Past Events

May 24, 2016
Event: MRSEC Seminar
Speaker: Prof. Debashish Chowdhury, Indian Institute of Technology, Kanpur, India
Title: TIP for grip, catch or slip: rupture force and lifetime of microtubule-"receptor" attachments
Abstract: A microtubule (MT) is nature's nano-tube. Because of the unusual kinetics of its polymerization and depolymerization, a MT can "search" for various types of "receptors". In a mitotic spindle, the machinery for chromosome segregation, the searching plus end of MT gets "captured" by a special receptor complex called kinetochore that is bound to one of sister chromatids. In contrast, the plus end of the astral MTs get captured by the cell cortex with the participation of +TIPs like EB1. Using simple theoretical models of (a) the MT-kinetochore attachments, and (b) MT-cortex attachments,  we study the nature of the grip of a MT on these two distinct types of receptors. More specifically, we calculate (i) the mean lifetime of the attachments under force clamp conditions, and (ii) the mean rupture force under force-ramp conditions. The MT-kinetochore attachments exhibit a catch-bond-like behavior that arises from force-dependence of the depolymerization kinetics whereas the MT-cortex attachment is like a slip bond.





May 23, 2016
Event: IRG 2
Speaker: Yi Fan, Breuer Lab, Brown University
Title: Simultaneous 3D tracking of passive tracers and microtubules in active matter








May 19, 2016
Event: MRSEC Seminar
Speaker: Yoav Lahini, Research Associate Harvard
Title: Non-monotonic slow relaxations and memory effects in disordered mechanical systems
Abstract: Many disordered systems that are far from equilibrium exhibit a range of similar physical phenomena, such as logarithmic relaxations, aging, and memory effects. Yet, in spite of many studies that have been conducted on these recurring motifs across a broad range of systems, identifying the mechanisms underlying the unusual out-of-equilibrium dynamics of disordered systems remains an outstanding problem in condensed matter physics. Here, I will describe several disordered soft-matter systems that exhibit a similar repertoire of far-from-equilibrium behavior, including non-monotonic relaxation towards equilibrium and the ability to hold a memory of previous external conditions that can last hours. At the same time, each one of these systems offers a way to track the evolution of its internal structure, presenting an opportunity to reveal and compare the underlying mechanisms across different systems.






May 13, 2016
Event: MRSEC Social Hour, TGITacos
*Grad students and postdocs only*





May 12, 2016
Event: MRSEC Seminar
Speaker: Prof. Scott Milner, Penn State
Title: "Mobility, correlation lengths, and structural entropy in glass-forming hard-sphere liquids:  
new simulation results for an old system"
Abstract: We can relate geometry and mobility in a glass-forming hard-sphere liquid by a purely geometric criterion:  “T1-active” particles, which can gain or lose a Voronoi neighbor by moving within their free volume with other particles fixed.  We use a “crystal-avoiding” MD method, which suppresses crystallization without altering the dynamics, to obtain geometrical and dynamical properties for monodisperse hard-sphere fluids with 0.40 < \phi < 0.64 .  We find the percolation threshold of T1-inactive particles is essentially identical to the commonly identified hard-sphere glass transition, \phi_g = 0.585.  
We can obtain correlation lengths in glass-forming hard-sphere liquids, from the response of dynamical properties (diffusion coefficient D and structural relaxation time \tau_\alpha) to a regular array of pinned particles. Dynamics slow dramatically as the correlation length becomes comparable to the spacing of the pinned array.  By assuming a scaling form, our results collapse onto a master curve, from which relative correlation lengths can be extracted.  The length obtained from dynamical property Q scales as log Q ~ \xi^\psi, with \psi \approx 1.
When a fluid glassifies, ergodicity is lost; configuration space is partitioned into many disconnected basins.  Each basin is a structurally distinct configuration of the glass; the structural entropy of a glass is the log of the number of such configurations.  We measure this entropy for glassy hard disks, by using the neighbor graph to identify configurations, and counting topologically distinct graphs for subsystems of increasing size.  We find the number of basins for N disks grows as e^{sN}, with s of order unity.


May 10, 2016
Event: MRSEC Executive Committee




May 10, 2016
Event: IRG 1
Speaker: Charlotte Kelley, Rodal Lab, Brandeis University
Title: "Bending bubbles: using giant vesicles and water droplets to study membrane remodeling proteins"








May 5, 2016
Event: MRSEC Seminar
Speaker: Prof. Kinneret Keren, Technion Israel Institute of Technology
Title: Actin turnover in motile cells
Abstract: Actin turnover is the central driving force underlying cell motility. The molecular components involved are largely known, and their properties have been studied extensively in vitro. However, a comprehensive quantitative picture of actin turnover in vivo is still missing. We focus on lamellipodial fragments from fish epithelial keratocytes, which lack the cell body but retain the ability to crawl with speed and persistence similar to whole cells. The geometric simplicity of fragments and the absence of additional actin structures allow us to characterize the spatio-temporal actin organization in their lamellipodium with unprecedented detail. These experimental measurements serve to guide the development of a predictive quantitative model of actin turnover in motile lamellipodia. Our results indicate that the bulk of the cytoplasmic actin pool is not available for polymerization, allowing diffusion to recycle actin effectively and facilitate steady cell migration, while maintaining the cell’s ability to generate rapid focused acceleration when needed.
April 21, 2016
Event: MRSEC Seminar
Speaker: Prof. Zhenkun Zhang, Nankai University
Title: What can Chemistry do in the self-assembly of rodlike colloidal particles
Abstract: Non-covalent interactions between building blocks ranging from molecules to colloidal particles are normally responsive for the assembling such units. Physics often play dominant roles in determining the hierarchical structure of the end assemblies. Chemistry, in most of cases, is only responsible for construction of the building blocks. However, chemistry sometimes can be explored to fine tune the non-covalent interactions such that reconfigurable assembly can be realized. In this talk, we shall summarize some of our works in the past five years to demonstrate how we have applied simple chemistry to influence the self-assembly of rodlike colloidal particles. We focus on two systems: the cholesteric liquid crystal (CLC) phase of rodlike viruses and side-by-side assembly of polymeric ellipsoids at fluid interfaces. In the former case, we shall show that chemical modifications of the virus building blocks can be exploited to fine-tune the ordering of the virus in the LC phases. The CLC phase of the re-functioned viruses can be responsive to external chemical information via in situ dynamic bond formation, which might be used as sensors. Several kinds of end-functionalized polymers have been designed in our groups and grafted to the rodlike virus which can further control the intervirus interactions, leads to stimuli- responsive LC phase and hydrogels with inherent internal chiral structure. In the case of ellipsoidal particles at 2D fluids, we shall show how chemistry is used to craft the surface properties and make the surface-deformation induced capillary attractions stand out and drive the ellipsoids assembly into well-defined ellipsoidal worms. 






April 14, 2016
Event: MRSEC Seminar
Speaker: Prof Rene Van Roij, Utrecht University, The Netherlands
Title: Blue energy and (other) sustainable heat-to-power conversion
Abstract: More than 2 kJ of (free) energy is getting dissipated with every liter of river water that flows into the sea. This energy, which is equivalent to a waterfall of 200 meter, can nowadays be efficiently harvested with devices based on modern nanomaterials such nanoporous electrodes and ion-selective membranes. For instance, a water-immersed supercapacitor composed of nanoporous carbon electrodes (with a km2/kg surface area) has recently been used to harvest this so-called “blue energy” through a fourfold charging-desalination-discharging-resalination cycle [1] that bears astrong resemblance to the expansion-cooling-compression-heating cycle of a classical Stirling heat engine [2]. We will discuss this analogy and present calculations to show that the harvested blue energy per liter can be doubled if the fresh water is warm (50C) rather than cold (10C), where the elevated temperature should stem from waste heat [3]. We will also briefly discuss another recent heat-to-power converter that is based on a supercapacitor filled with an ionic liquid [4], and a device that converts small mechanical vibrations into electricity using deformable water droplets between a vibrating parallel-plate capacitor [5]. In all these cases ubiquitous gradients and sources are used to sustainably harvest electric energy using a variable capacitance.
[1] D. Brogioli, Phys. Rev. Lett. 103, 058501 (2009).
[2] N. Boon and R. van Roij, Mol. Phys. 109, 1229 (2011).
[3] M. Janssen, A. Härtel, and R. van Roij, Phys. Rev. Lett. 113, 268501 (2014).
[4] A Härtel, M Janssen, D Weingarth, V Presser, R van Roij, Energy & Envir. Science 8, 2396 (2015).
[5] M. Janssen, B. Werkhoven, and R. van Roij, RSC Advances 6, 20485 (2016).







April 11, 2016
MRSEC Executive Committee


April 8, 2016
MRSEC Social Hour, TGITacos
*Grad students and postdocs only*





April 7, 2016
Event: MRSEC Seminar
Speaker:  Alex Klotz, MIT
Title: DNA Polymer Physics with Complex Geometry (and Topology)
Abstract: Single DNA molecules are used as model polymers due to their mesoscopic length scales, their monodispersity, and the availability of single-molecule imaging techniques. Nanofluidic confinement is a powerful tool to study single-molecule dynamics with DNA, both as a tool to probe the underlying physics governing polymer confinement and as stepping-stone to the development of genomics technologies. Here, I discuss my work studying DNA confined in a complex nanofluidic device featuring a nanofluidic slit embedded with an array of cavities, that causes molecules to partition contour between regions of varying confinement, such that they look like pieces from the video game Tetris. By examining the equilibrium DNA partitioning under different geometric conditions, I can investigate the competing effects of entropy, self-exclusion, and semi-flexibility on a single-molecule basis. I will also discuss recent work examining the behavior of knotted DNA molecules under extensional flow.





March 31, 2016
Event: MRSEC Seminar
Speaker: Lutz Maibaum, University of Washington
Title: Spatial organization of the plasma membrane
 and peripheral membrane proteins
Abstract: Cellular membranes are complex organelles composed of phospholipids, sterols and proteins, among others. The spatial organization of these components affects its biological function. Our work uses computer simulations and modeling to study two mechanisms that lead to the emergence of spatial order: the phase behavior of multicomponent lipid bilayers and the effect of membrane-induced interactions on membrane-bound proteins.  Lipid composition heterogeneities have attracted much attention recently as they might form the basis for lipid rafts, small domains rich in sterols that corral membrane proteins. We study the phase behavior of multicomponent bilayers using simulations of coarse-grained molecular and general field-theory based models. We find a wide range of membrane systems that exhibit composition correlations over nanometer length scales. A different type of lateral structure can be induced by proteins binding to the membrane, which restricts the latter’s intrinsic fluctuations. This gives rise to an interaction between proteins that is transmitted by the membrane’s elastic properties. We develop a hybrid model that combines a continuum description of the membrane with a particle representation of the proteins, and show that the membrane-induced interaction gives rise to an effective attraction between proteins that can act on length scales much larger than typical intermolecular forces.
March 29, 2016
Event: MRSEC Seminar
Speaker: Simon Merminod, Université Paris Diderot
Title: Order-disorder transitions in a driven magnetic granular monolayer
Abstract: In an experiment at the human scale, we can observe with the naked eye phenomena involved in the shaping of matter at the molecular scale, resulting from the competition between thermal disordered motion and non-contact interactions between particles. 
Soft ferromagnetic particles are placed inside a horizontal, quasi-two-dimensional cell and are vertically vibrated, so that they perform a horizontal quasi-Brownian motion. When immersed in a transverse magnetic field, the particles become magnetized and thus interact according to a dipolar repulsive law. 
Ordered and disordered phases are observed depending on the particle area fraction, the ratio of the magnetic energy to the kinetic energy, and the processing pathway. 
At low particle area fraction, we show that, prior to the complete solidification of the disordered granular gas into a crystalline state, the typical properties of this dissipative out-of-equilibrium granular gas are progressively lost, to approach those expected for a usual gas at thermodynamic equilibrium. 
Surprisingly, at a higher area fraction, the system solidifies into a large-scale disordered labyrinthine phase mostly constituted of randomly oriented chains of particles in contact, despite the magnetic repulsion. We characterize quantitatively this transition and explain the formation of these chains using a simple model. Moreover, by studying the aging properties of the labyrinthine phase, we show that it exhibits slow dynamics, which occurs typically in out-of-equilibrium disordered systems such as structural glasses.
March 28, 2016
MRSEC Seminar
Speaker: Arvind Baskaran, Postdoc candidate
Title: Entropic Stabilization of Strain-Driven Morphological Instabilities in Thin Film Growth
Abstract: Heteroepitaxial growth is the layer-by-layer growth of one crystalline material on a substrate of another. Popular film/substrate combinations include semiconductors such as Ge/Si and InGaAs/GaAs. When the film and substrate species are lattice mismatched the film introduces a strain in the substrate. This leads to a morphological instability where the film undergoes a transition from layer by layer growth to island formation known as the Stranski-Krastanov transition. These self-assembled islands can serve as quantum dots and are of great practical importance in construction of optoelectronic devices. The morphological characteristics of the islands determine the electronic properties of the quantum dots.  One key morphological feature is that this transition occurs after the deposition of a certain critical thickness of the film. Further the islands are observed to sit on top of a wetting layer of film atoms of a certain thickness. This talk will discuss the mechanisms that lead to the various features of the morphological transition. The talk will outline an atomistic kinetic Monte Carlo approach to model this system. Then through systematic numerical exploration a theory based on entropic stabilization mechanisms for this growth mode will be detailed. The relationship between growth conditions and the morphology will also be discussed. This work was done in collaboration with Peter Smereka.









March 21, 2016
MRSEC Executive Committee
Time: 9:30 am





March 11, 2016
MRSEC Social Hour, TGITacos
*Grad students and postdocs only*
 





March 10, 2016
MRSEC Seminar
Speaker: Mohamed Gharbi, McGill University, Canada
Title: Elasto-capillarity: A new toolkit for directed assembly of advanced materials
Abstract: The opportunities for guiding assembly using elastic energy stored in soft matter are wide open. The emerging scientific frontiers in this field show an exceptional promise for significant new applications. Since soft materials can be readily reconfigured, there are unplumbed opportunities to make responsive devices including smart windows for energy efficiency, and responsive optical structures. In the other hand, the trapping of colloidal objects at interfaces between immiscible fluids has proven to exhibit incredible abilities to template the arrangement of particles into rich ordered structures. These structures are controlled by lateral forces that compete with capillary forces. However, these interactions are still unexplored when particles are trapped at the interface of an ordered fluid. In this talk, I will present recent progress in understanding the mechanisms that govern interactions between particles at liquid crystal interfaces. I will report how the resulting potential induced by the interplay between elasticity and capillarity could lead to new opportunities for genuine spontaneous self-assembly and create new strategies for making new generation of advanced materials that may find relevance in many applications in the field of energy technology.


March 3, 2016
Room: Abelson 229
Time: 4 pm
Event: MRSEC Seminar
Speaker: Baptiste Blanc, Fraden Lab
Title: Electroosmosis at liquid interfaces
Abstract: Electrokinetic (EK) transport couples hydrodynamics and electrostatics at liquid interfaces. In particular, it is possible to generate a flow near a charged interface in a liquid by applying an electric field, due to the drag force exerted on counter ions near the interface, a phenomenon referred to as electro-osmosis (EO). We propose here to use EO in the context of liquid foams, the charges being carried by the surfactants used to stabilize the foam. The main challenge of the project is to achieve a complete understanding of EK transport in a 3D liquid foam. To do so, we used a multiscale approach combining experimental and theoretical (molecular dynamics (MD) simulation) tools. In this article, we present our newest results on this general project.








February 22, 2016
MRSEC Executive Committee
Time: 9:30 am




February 18, 2016
MRSEC Seminar
Speaker: Madison Krieger, Brown University
Title: Locomotion in liquid crystals
Abstract: Swimming at the micron scale is a topic that is nearly a century old, yet has seen renewed interest as novel swimming mechanisms, fluid backgrounds, fluid-structure- and collective-effects have been discovered. Recent theoretical attention has been payed to swimming in rotationally-isotropic viscoelastic fluids and gels, and also to active nematics, which are inherently anisotropic. A phenomenon that lies between these two extremes is that of a single motile microorganism immersed in a nematic liquid crystal, where the nematogens are not active but the viscous and elastic anisotropy gives rise to several interesting swimming behaviors. We discuss some aspects of this locomotion problem in its own right and also seat it between these existing literatures as an active phase known as a "living liquid crystal." 









February 12, 2016
Event: MRSEC Social Hour, TGITacos
*Grad students and postdocs only*
Click here to view poster.
 



February 9, 2016
MRSEC Seminar
Speaker: Marilia Barros, Carnegie Mellon
Title: Revealing the Molecular and Structural Basis of Retroviral Assembly and Endolysin PlyC Membrane Translocation
Abstract: Numerous biological processes are either triggered by or result in the formation of protein-lipid complexes at the membrane.  The study on the interactions between lipids and proteins is fundamental to gaining insights into the physical aspects of biological processes. We investigated molecular-scale aspects of such membrane interactions using sparsely-tethered lipid bilayer membranes (stBLMs). Applying complementary surface-sensitive techniques such as surface plasmon resonance (SPR) and neutron reflectometry, we  examined  the  details  of  two-stage interaction - surface adsorption and bilayer insertion - and demonstrate the first steps towards a mechanistic understanding of how the endolysin PlyC binding domain, PlyCB, initiates membrane translocation. We also assessed the specific roles of electrostatic, hydrophobic and lipid-specific contributions to HIV-1 matrix (MA) membrane coupling aiming to understand the mechanisms that lead to the recruitment of specific lipids into the viral shell. The impact of MA myristoylation was evaluated and the role of cholesterol was assessed in promoting protein affinity to the bilayer. The molecular level details reported here provide a better understanding of the lipid interactions of MA and their implications for proper Gag membrane association and retroviral particle assembly.








January 28, 2016
Event: MRSEC IRG Progress Report
Speaker: Xuewen Du, Xu Lab
Title: Self-assembled Molecular Nanofibers Promiscuously Interact with Cell Surface Death Receptors




January 25, 2016
Event: MRSEC Executive Committee





January 21, 2016
Event: MRSEC Seminar
Speaker: Johannes Zwanniken, UMass Lowell
Title: Electrolytes at the interface: charge stabilization in colloids, emulsions and polymer blends
Abstract: Electrolytes play a vital role in numerous biological processes, and are key to the stability of many systems in Soft Condensed Matter, such as colloids, emulsions, and solutions of charged macromolecules. Since the work of Gouy, Chapman, Debye, Kirkwood et al., it is well known that ions 'screen' the interactions between charged solutes, and that elevated salt concentrations can induce aggregation, an effect also known as 'salting-out'. About three decades ago, however, it became clear that this picture is too simplistic after simulations and experiments had indicated that ions can also induce attractions between like-charged solutes.
I will discuss that ion-ion correlations are an important missing factor in the classical picture, and that the ignored 'cohesion' of the ion cloud can induce effects opposite to basic screening. We study ions in a narrow confinement with simulations (Car-Parrinello Molecular Dynamics), and with liquid state theory (Ornstein-Zernike with the anisotropic HNC closure), and find strong density oscillations and a liquid-like structure of ions for parameters that correspond to aqueous solutions of ~ 0.1 M concentrations [1]. Ion-induced interactions between colloidal particles are calculated, and are found to be repulsive or attractive, depending on the specific ion parameters and dielectric properties of the colloids.
In a similar fashion, one can shift the phase diagram of polyelectrolyte blends and block-copolymers in multiple directions by changing the ionic properties, as concluded from a hybrid Liquid-State Self-Consistent Field Theory (LS-SCFT) [2,3].
These correlational effects can be interpreted as the consequence of two 'thermal forces' that originate from direct interaction and the brownian motion of the ions. A generalization of these concepts to driven systems, and solutions with 'memory' could be most relevant for the development of soft ionic materials. Inspiration can be gleaned from recent developments in the field of Active Matter.




December 17, 2015
Brandeis University
IRG Progress Report
Speaker: Cong Qiao, Hagan group
Title: Viral genome structures and viral capsid assembly on a curved surface





Monday, December 14, 2015
Time: 9:30 am
Location: Abelson 307, Brandeis University
Executive Committee
Thursday, December 10, 2015
Brandeis University
IRG Progress Report
Speaker: Kunta Wu, Dogic Lab
Title: Self-pumping Active Gel





Friday, December 4, 2015
Brandeis University
Linkedin for Scientists: Profile‐Building & Advanced Networking
Host: Sabrina Woods
Thursday. December 3, 2015

Brandeis University
MRSEC Seminar
Speaker: Rizal F. Hariadi, Harvard University 
Title:Tuning the collective behavior of molecular motor ensembles using DNA origami scaffolds and DNA nanotubes







Monday, November 23, 2015
Brandeis University
MRSEC Seminar
Speaker: Arvind Baskaran, NIST
Title: The Physics of Nano-crystal Inks, Slushy and Ice Cream
Abstract: The equilibrium theory of solid-liquid phase transitions is well understood. However the non-equilibrium aspects and approach to equilibrium are still not clear. One such non-equilibrium phenomenon is the effect of melt flow on the freezing transition. This is the effect that stabilizes a slushy as a co-existence of crystal and melt due to the flow of the liquid. The phenomenon is of importance in many applications like the liquid phase synthesis of nano-crystals. This talk will present a theory to characterize the effect of flow on freezing. A non-local hydrodynamic theory of freezing derived from the revised Enskog kinetic theory will be presented. This theory will be shown to take the form of a time dependent density functional theory. Numerical exploration of the theory and simulations characterizing the effect of flow on solid-liquid phase transitions will be presented.






Thursday, November 19, 2015
Brandeis University
IRG Progress Meeting
Speaker: Abhijit Ghosh
Title: Phase Behavior of Three Component Viral Membranes : Continuum Theory





Monday, November 16, 2015
Brandeis University
MRSEC Annual Retreat



Monday, November 16, 2015
Brandeis University
Executive Committee





Thursday, November 12, 2015
Brandeis University
MRSEC Seminar
Speaker: Selcuk Yasar, PhD Student with Adrian Parsegian at UMass Amherst, Guest of Prof. Ben Rogers
Title: Order and Ordering Transitions  in Columnar DNA Aggregates: Duplexes, Triplexes, and G-quadruplexes
Abstract: We think of DNA as double stranded helices (duplex) encoding life, but the polymer exists in many conformations indeed; several triplex and quadruplex structures can be formed in laboratory settings and exist in nature. I will start with a description of the nature of the order in phase-separated arrays of duplex DNA under biologically relevant molecular crowding conditions. Then I will compare the duplex DNA mesophases, under PEG-induced crowding conditions, with the corresponding liquid crystalline phase behavior of the triplex and G-quadruplex DNA analogues. In particular, I will focus on G-quadruplexes. Observed in the folds of guanine-rich oligonucleotides, G-quadruplex structures are based on G-quartets formed by hydrogen bonding of guanosines. In dilute 5'-guanosine monophosphate (GMP) solutions, G-quartets form by the self-assembly of four GMP nucleotides. We use x-ray diffraction to investigate the columnar liquid-crystalline mesophases in concentrated solutions of various G-quadruplexes. We then probe the mesophase transitions by varying the PEG solution osmotic pressure. Using the GMP-quadruplex, built by the stacking of G-quartets with no covalent linking between them, as the baseline, we report the liquid- crystalline phase behaviors of two other related G-quadruplexes: (i) the intramolecular parallel-stranded G-quadruplex formed by the 22-mer four-repeat human telomeric sequence AG3(TTAG3)3 and (ii) the intermolecular parallel-stranded G-quadruplex formed by the TG4T oligonucleotides.
Thursday, November 12, 2015
Brandeis University
IRG Progress Meeting
Speaker: Jessica Henty-Ridilla
Title: Role of mDia1-CLIP-170 interactions in coordinating the actin and microtubule cytoskeletons






Friday, November 6, 2015
Brandeis University
Get Your Thoughts in Order: Approaching Your Science Writing
Host: Kimberly Stewart


Tuesday, November 3, 2015
Brandeis University
There’s a Scientist in my Classroom 
Host: Anique Olivier-Mason




Thursday, October 29, 2015
Brandeis University
IRG Progress Meeting
Speaker: Adam Johnston
Title: Accelerated treadmilling of a filamentous actin network



Friday, October 23, 2015
Brandeis University
Writing Your Teaching Philosophy Statement Workshop
Host: Anique Olivier-Mason and Suzanne Paradis 






Thursday, October 22, 2015
Brandeis University
IRG Progress Meeting
Speaker: Mahsa Siavashpouri 
Title: Helices Of Helices





Thursday, October 22, 2015
Brandeis University
MRSEC Seminar
Speaker: Roland Winkler, Institute of Complex Systems
Title: Microswimmer: From swimming bacteria to collective behaviors of active Brownian particles 
Abstract: Locomotion is a major achievement of biological evolution. Microorganisms, such as bacteria, algae, and sperm cells are equipped with flagella and are able to exploit drag for their propulsion. Two prominent swimming mechanisms are rotating helical flagella, exploited by many bacteria, and snake-like or whip-like motion of eukaryotic flagella, utilized by sperm and algae. Thereby, hydrodynamic interactions play a major role in the swimming motion.
In assemblies of motile microorganisms, cooperativity plays a major role as they exhibit highly organized movements with remarkable large-scale patterns such as networks, complex vortices, or swarms. To unravel the emergent behaviors often simplified models such as active Brownian particles (ABPs) are considered. The generic approaches provide valuable insight into the non-equilibrium statistical aspects of active matter.
In the talk, theoretical and computer simulation results will be presented for the swimming behavior of E. coli bacteria, both in bulk and at surfaces. Moreover, the cooperative dynamics of ABPs will be discussed and a link will be established to the non-equilibrium pressure equation of state.   
Host: M. Hagan




Monday, October 19, 2015
Brandeis University
Executive Committee





Thursday, October 15, 2015
Brandeis University
IRG Progress Meeting
Speaker: Elias Putzig
Title: Active Nematics


Thursday, October 15, 2015
Brandeis University
MRSEC Seminar
Speaker: Mike Norton
Title: GROWTH AND TRANSPORT OF NANOBUBBLES IN TAPERED CHANNELS OBSERVED VIA ELECTRON MICROSCOPY
Abstract: Bubbles adhered to substrates and confined within structures are ubiquitous in natural and designed systems. The recent development of micro-fabricated, hermetically sealed liquid-cells has made it possible to observe the growth, and transport of such bubbles at unprecedented magnifications using electron microscopy. In this talk, bubbles (tens to hundreds of nanometers in radius) created by electron beam-induced decomposition of water will be discussed. The bubbles are observed emanating at regular intervals from preferential locations upon the silicon-nitride windows of the liquid cell. When the bubbles grow large enough to contact both membranes, they migrate due to confinement gradients. The growth dynamics are found to depart substantially from the classical mass-transfer driven growth theory of Epstein and Plesset (EP). A model including contact line dissipation valid in the limits of zero capillary and bond numbers is proposed to explain both migration and growth dynamics. 2D and 3D models are constructed around the Blake-Haynes mechanism, which relates the local dynamic contact angle to the instantaneous contact line velocity. Both 2D and 3D models predict that in order for a confined bubble to grow in a super-saturated solution it must first increase its curvature; this is in contrast to a free-floating bubble whose curvature always decreases with the addition of mass/volume. For a gaseous bubble, surface concentration is proportional to the internal pressure of the bubble; thus, this non-monotonic geometric change temporarily regulates the growth of the bubble. The model predicts growth rates like those observed experimentally that are several orders of magnitude lower than EP theory. The framework developed is also used to explore the impact of partial contact line pinning on the geometry of growing bubbles. Additional phenomena unique to electron microscopy of liquids will be presented such as spontaneous local thickening of liquid films during observation, surface instabilities of films, and self-sustaining oscillations of the contact line under steady beam conditions. 




Tuesday, October 6, 2015
Brandeis University
IRG Progress Meeting
Speaker: Derek Wood
Title: Binding of Gold Nanoparticles to a Lipid Bilayer Membrane: Investigating the Role of Membrane Tension and Nanoparticle Size



Tuesday, September 29, 2015
Brandeis University
IRG Progress Meeting
Speaker: Sudhir N Pathak
Title: Active Nematics




Monday, September 28, 2015
Brandeis University
Executive Committee




Tuesday, September 15, 2015
Brandeis University
Membrane IRG Progress Report
Speaker: Dan Chen
Title: Rheology of active gels
 





Tuesday, September 8, 2015
Brandeis University
Membrane IRG Progress Report
Speaker: Joia Miller
Title: Raft interactions in colloidal membranes



Tuesday, September 1, 2015
Brandeis University
Active Matter IRG
Speaker: Bernard Hishamunda
Title: Confinement of active materials




Monday, August 31, 2015
Brandeis University
MRSEC Executive Committee 


Tuesday, August 25, 2015
Brandeis University
Membrane IRG 
Speaker: Leroy Jia
Title:  A Minimal Model for the Force vs. Extension of a Colloidal Membrane





Thursday, August 20, 2015
Brandeis University
MRSEC Seminar
Speaker: Ariel Amir, Harvard



Tuesday, August 18, 2015
Brandeis University
Active Matter IRG 
Speaker: Yaouen Fily
Title: Confined active particles

Wednesday, August 5, 2015

Brandeis University
MRSEC Summer Seminar Series
Speaker: Josiah Herzog, Paradis Lab
Title: Neurons Seeking Neurons - Get Connected, Stay Connected
Abstract: The central nervous system is composed of billions of cells that talk to each other by forming trillions of connections. These connections, or synapses, allow neurons to pass on information from one cell to the next in effort to transmit a signal, sometimes across a great distance. Forming these connections and maintaining them is vital in development and livelihood. In neurodegenerative diseases like Alzheimer’s Disease, Amyotrophic Lateral Sclerosis, and Frontotemporal Lobar Degeneration neurons atrophy resulting in aberrant connectivity. Little is known about what changes occur inside the cell that cause these neurons to alter their morphology. We are looking at genes that have been implicated in these diseases to understand what molecular players are involved and how they become dysfunctional.
Speaker: Vivekanand Pandey Vimal, Ashton Graybiel Spatial Orientation Lab
Title: Gravitational Cues and Balancing
Abstract: Within the churning breath of the universe, that is slowly exhaled between the cycles of life and death, is the intrinsic dance of balance.  In my experiment I follow the journey of humans strapped inside a machine programmed to behave like an inverted pendulum. Deprived of vision, audition, and the use of their peripheral reflexes, these humans are asked to balance the machine while using a joystick.  I also minimize the gravitational cues that they receive and then I watch them ride this beast of turbulence.  What will happen to these humans?  Will they be able to learn to balance in this dark, confusing and womb-like world...or will they endlessly tumble into an unforgiving oblivion?




Tuesday, August 4, 2015
Brandeis University
MRSEC Active Matter IRG
Speaker:  Feodor Hilitski 
Title: Extensile Microtubule Bundles



Tuesday, July 28, 2015
Brandeis University
MRSEC Membrane IRG
Speaker: Andrew Balchunas
Title: Using a microfluidic device to explore nonequilibrium states of colloidal membranes




Thursday, July 23, 2015
Brandeis University
MRSEC Seminar
Speaker: Ian Morrison, Harvard
Title: Measurements on particles to “predict” liquid-particle interactions
Abstract: For over 200 hundred years, we’ve known that measuring the contact angle of liquids on solids is a start to understanding liquid-particle interactions. However, contact angles can only be measured on large, preferably flat, surfaces (even though some publications claim otherwise). Possibly interesting progress has been made by combining (1) a thermodynamic derivation by Gibb’s with (2) some separate suggestions by Derjaguin and by deGennes, and (3) Lifshitz’s physics on the stability of thin films.  If useful, then the measurement of gas adsorption of a few of organic gases, with the usual linear free energy relations used in physical chemistry, gives a predictive method for the interaction of other liquids or polymers  (similarly characterized) with those particles.
 
Wednesday, July 22, 2015
Brandeis University
MRSEC Summer Seminar
Speaker: Jacqueline McDermott
Title: Synapse Development: Using Semaphorin4D as a Tool to Form Connections Within the Brain
Abstract: The cells in your brain form a number of different types of connections, or synapses. These synaptic connections must be made correctly in order for the proper development of the nervous system, as well as to avoid the manifestation of neurological disorders. I specifically use Semaphorin4D (Sema4D) as a tool in order to rapidly drive the development of a specific type of synapse: the inhibitory GABAergic synapse. In this way, Sema4D can be used in order to initiate and study the process of how inhibitory connections form within the mammalian brain.

Speaker: Adriane Otopalik
Title: Probing Nervous Systems, Big and Small, with Photo-Activatable Molecules
Abstract: Single neurons must integrate diverse chemical signals through time and space, and respond appropriately. How neurons accomplish this task remains a puzzle.  In this short talk, I will discuss how photo-activatable molecules allow for tightly-controlled spatial and temporal experimental manipulations. With these optical tools, we can gain a better understanding of how single neurons and neuronal circuits manage their dynamic chemical milieus.


Tuesday, July 21, 2015
Brandeis University
MRSEC Membrane IRG
Speaker: Feodor Hilitski
Title: Extensile Microtubule Bundles
Thursday, July 16, 2015
Brandeis University
MRSEC Seminar
Speaker: Matthew Webber, MIT
"Molecular Engineering of Peptide and Protein Therapeutics"
Abstract: Through molecular engineering, it is possible to address complexities associated with the deficiencies and dynamics of diseases, such as ischemia and diabetes, in order to engineer improved therapies. The biological relevance of peptides, and the ability to precisely engineer supramolecular interactions through directional assembly and organized hydrogen bonding, enables the generation of platforms that can be utilized as new therapeutic materials. These bio-inspired materials interface with biology and physiology in a mimetic and active way. Self-assembling peptides can be used to present potent bioactive signals at high density to mimic the effects of angiogenic growth factors, or to prepare favorable niches for stem and progenitor cell therapeutics. This facilitates injectable strategies to regenerate blood vessels in models of peripheral ischemia, with improvements in microcirculation, limb necrosis, and motor function. Molecular interactions can additionally be leveraged to alter therapeutic dynamics and afford aspects of biologically relevant sensing in molecularly engineered protein therapies. Diabetes, and the complexities associated with glycemic control, present a significant engineering challenge in the design of therapies to recapitulate and replace the dynamics of native insulin signaling. Through covalent modification of insulin with molecular recognition motifs and aliphatic groups, the kinetics of insulin activity can be modulated by glucose-mediated intermolecular interactions, resulting in biomimetic insulin therapy. Specifically, this approach facilitates glucose-triggered insulin activity and responsiveness to glucose challenge mirroring that of a healthy functioning pancreas. An alternative strategy would endeavor to leverage supramolecular excipient-only approaches to modulating insulin stability and function. In sum, these findings point to a new era of rationally engineered therapies rooted in predictable, biomimetic, tunable, and dynamic intermolecular and supramolecular interactions.




Tuesday, July 14, 2015
Brandeis University
MRSEC Membrane IRG
Speaker: Xuewen Du
"Enzymatic Transformation of Phosphate Decorated Magnetic Nanoparticles Selectively Sort and Inhibit Cancer Cells"
 







Thursday, July 9, 2015

Brandeis University
MRSEC Seminar
Speaker: Nikta Fakhri, MIT
"Active stochastic fluctuations stir the interior of the cell & remodel the networks"
Abstract: Active processes in cells and tissues create a novel class of non-equilibrium materials composed of molecularly interwoven structural elements and force generators that individually consume energy and collectively generate motion or mechanical stresses. Active systems exhibit a wealth of intriguing properties, including anomalous fluctuations, non-equilibrium phase transitions and unusual mechanical and rheological properties. In this talk, I will discuss two different systems in which cytoskeletal motors create complex dynamics.
I will first present a quantitative study of molecular motions in the cytoskeleton of adherent cells over times from milliseconds to hours. Noninvasive tracking is accomplished by imaging near-infrared luminescent single-walled carbon nanotubes (SWNTs) targeted to kinesin-1 motor proteins in COS-7 cells. We discover active "stirring'' driven by cytoplasmic myosin as an intermediate random mode of transport, clearly distinguishable from both thermal diffusion and ballistic directed kinesin motor activity.
The cortical actin cytoskeleton is a quasi 2-D active material in which dynamics are dominated by rapid actin turnover and myosin-driven contractility. In the second part, I present a reconstituted model system that emulates these processes in artificial cell-like compartments. By tuning physical and chemical parameters, we induce a non-equilibrium state transition. We characterize the local dynamics of these reconstituted cortices by tracking embedded SWNTs. We find evidence that connectivity percolation drives transitions between different non-equilibrium steady states.







Wednesday, July 8, 2015
Brandeis University
MRSEC Summer Seminar
Speaker: Josef Clask
"The Capacity of Target Silencing by Drosophila PIWI and piRNAs"
Abstract: Piwi proteins and piwi-interacting RNAs (piRNAs) actively silence transcribed transposable elements (TEs), but the mechanism is not fully understood. This silencing mechanism may involve Piwi binding nascent RNA transcripts and then recruiting chromatin modifying proteins. To dissect the Piwi-mediated transcriptional silencing mechanism of TEs, we developed a reporter assay platform in the OSS cell culture system. We are able to show that siRNA induced knockdown of Piwi protein can allow for transcriptional derepression of reporter plasmid proportional to the density of piRNAs binding the transposon sequence within nascently transcribed RNA. Furthermore, this reporter system has allowed us to examine the requirements of Drosophila chromatin silencing factors, as well as factors involved in transcriptional dynamics. Our data suggests that Piwi-dependent deposition of silent histone marks, as well as a slowing of transcription may induce more efficient silencing of our piRNA-targeted reporters. Further experiments will dissect the mechanism that is required for Piwi-mediated transcriptional gene silencing of TE loci.
Speaker: Raunak Sakhardande
Title: Chiral Rafts in Colloidal Membranes
Abstract: In contrast to bulk liquids or crystals clusters of finite size are rare and their assembly usually requires sophisticated engineering. Recent experiments conducted on monolayer membranes composed of two species of chiral rodlike molecules leads to the spontaneous formation of thermodynamically stable, rafts with a well-defined finite size. To understand the fundamental forces driving this self-limited assembly, we combine Monte Carlo simulations and a mean field theory to explore the phase diagram of a monolayer of bidisperse rodlike molecules as a function of interparticle interactions and chirality.  The simulations demonstrate that differences in chirality between the two rod species can stabilize finite-sized rafts.  We present a phase diagram which predicts parameter ranges over which finite-sized rafts are stable.
Wednesday, July 8, 2015
Brandeis University
MRSEC Executive Committee 





Friday, June 26, 2015
Brandeis University
MRSEC Seminar
Speaker:  Xixiang Zhang, KAUST
"Magneto transport properties of three-dimensional flexible and conductive interconnected graphene networks"
Abstract: A new type of graphene material, three-dimensional flexible and conductive interconnected graphene networks (graphene foam ) has been synthesized using chemical vapour deposition with Ni foam as a template [1]. This material exhibit interesting properties and has found a number a applications, such as, flexible lithium ion batteries with ultrafast charge and discharge rates [2], electromagnetic interference(EMI) shielding materials [3]. In this work we presents the study of magneto-transport properties of the three-dimensional flexible and conductive interconnected graphene networks. The magnetoresistance (MR) as a function of applied magnetic field was measured in different configurations: a) magnetic field being perpendicular to both the foam plane and the current; b) magnetic field being parallel the foam plane and the current; and c) magnetic field being perpendicular to the current, but angle between the magnetic field and normal direction of the foam plane being changed. As large as 300% of magnetoresistance was observed in two both configurations of (a) and (b). More importantly, the observed MR is not only very large, but also nearly temperture independent over the whole temperature range. This characteristics of the MR qualifies the graphene foam as a potential material candidate for the field sensors operating in both wide temperture range and with magnetic field range. Another very interesting observation is that an anisotropic MR was observed in the third configuration, which was not expected for three dimensional nature of the material. All the above observation indicate that this novel material opens a wide possibility not only for applications but also for the fundamental research.
Thursday, June 25, 2015
Brandeis University
MRSEC Outreach
"Career Pathways Networking Lunch"
Abstract: A lunch for grad students and postdocs with individuals from different career paths ready to discuss their work and advise how a recently minted PhD can get their foot in the door.
Thursday, June 25, 2015
Brandeis University
MRSEC Outreach
"2015 Summer Undergraduate Science Symposium"
Abstract: This year, the MRSEC (Materials Research Science and Engineering Center) Student Committee and Education Director are planning the Undergraduate Mini Symposium. This special career-planning event is for undergraduates doing research at Brandeis over the summer to learn about the variety of careers open people with a science background. During the full day event, students will hear inspirational stories from faculty and students about their personal journeys into science and pose questions to a faculty panel on the graduate admissions process. Students will also participate a new interactive speed-networking event with twelve guests from a variety of career paths. Most of the guests are Brandeis alumni or former postdocs.
Wednesday, June 24, 2015
Brandeis University
MRSEC Summer Seminar
Speaker: Mahsa Siavashpouri/ Joseph Rauch
"Hierarchical self-assembly of DNA origami rods/ The evolution and maintenance of cooperation"
Abstract: The connection between the macroscopic properties of a liquid crystalline material and the microscopic features of the constituent molecules is the essential theme that permeates the field of liquid crystals. Previous studies have shown that in presence of attractive interactions mediated by non-absorbing polymers, monodisperse rod-like colloids such as filamentous bacteriophage self-assemble into twisted ribbons and monolayer membranes. The microscopic properties of the colloidal particles play an important role in determining the physical properties of these mesoscopic assemblages. Using structural DNA nanotechnology, we present the design and structure of DNA origami six-helix bundles with tunable microscopic properties, which can be used as a new building block for the self-assembly of rod-like colloidal particles. We demonstrate that formation of higher order structures from the assembly of colloidal rods is universal. By tuning the chirality, aspect ratio and flexibility of the DNA origami particles we can control the physical properties of the entire self-assembled structures.
=====
Cooperation seems to pose an evolutionary dilemma in light of natural selection. Generally, natural selection states the fittest species will survive, however, cooperation, which by definition involves a cooperator raising another’s fitness while often lowering their own, is found abundantly in nature.  Over the last half century or so, there as been an outpouring of research devoted to understanding this dilemma; how does cooperation originate and how is it maintain in a population?  Here I present several mechanisms capable of maintaining cooperation  and the conditions under which they are applicable.




Thursday, June 18, 2015
Brandeis University
MRSEC Seminar
Speaker: Jin-Gyu Park, Harvard 
"Self-assembly of colloidal particles for structural coloration"
Abstract: Structural colors arise from interference rather than absorption. This pigmentation scheme is common in nature such as blue birds, beetles, chameleons, and some seashells, where reflected light by the nanostructures constructively interfere at certain wavelengths of visible range. This talk will present a convenient way to achieve such non-fading structural colors using colloidal particles as building blocks of nanostructures. The structurally colored materials could potentially replace dyes and pigments in paints, cosmetics, smart optical sensors, and reflective color displays. 






Wednesday, June 17, 2015
Brandeis University
MRSEC Outreach
Speaker: Seila Selimovic
"Science Policy: Science for Policy or Policy for Science?"
Abstract: As a AAAS Science and Technology Policy Fellow in Washington, DC, Dr. Selimovic has been involved in a range of projects: from attending the UN's IAEA General Conference in Vienna as member of the US delegation, to setting up international innovation and scientific cooperation programs, to piloting education coursework on nuclear energy, and finally preparing analyses and papers for administration principals. Dr. Selimovic will speak about her path to the AAAS Fellowship and her experiences as a Fellow working on science policy. In some of her projects she focused on using scientific data to draft or support policy goals, while in others she relied on her policy and diplomacy skills to effect improvements in scientific communication and outreach. Last, not least, Dr. Selimovic will reflect on how a scientist can weather the shift from academia to policy and use her analytical and research skills and expertise to excel in this new environment.
Monday, June 15, 2015
Brandeis University
MRSEC Outreach
Speaker: Anique Olivier-Mason and Steven Karel
"Career Discovery Workshop: an IDP (Individual Development Plan) Introduction"
Abstract: A 90-minute workshop for grad students and postdocs on how an Individual Development Plan can enhance your training at Brandeis today and ensure you land your dream job tomorrow. Facilitated by Drs. Steven Karel and Anique Olivier-Mason.





Thursday, June 11, 2015

Brandeis University
MRSEC Seminar
Speaker: Simone Dussi, Utrecht University 
"Can entropy alone stabilize cholesterics? A proof from computer simulations"
Abstract: Hard particles have been used as indispensable models to elucidate the role of entropy in the stabilization mechanism of very many different thermodynamic phases. The effect of particle shape on the liquid crystalline phase behaviour was studied by Onsager in 1949, who predicted an entropy-driven isotropic-nematic transition for infinitely long and hard rods. In 1976, Straley predicted that entropy alone could stabilize a cholesteric phase of infinitely long, weakly chiral hard rods. Our theoretical predictions confirm that also for finite hard helices cholesterics are stable, even if in this case the relation between micro- and macro-chirality is far from being trivial [1,2]. However, despite an extensive simulation study on the phase behaviour of hard helices [3], arguably the simplest chiral hard-particle model, no evidence of a cholesteric phase has been observed in computer simulations yet. In this talk, I will consider a novel particle model for chiral hard rods and present the first simulations of a cholesteric phase that is purely entropy-driven. 
Monday, June 8, 2015
Brandeis University
MRSEC Executive Committee






Thursday, June 4, 2015
Brandeis University
MRSEC Seminar
Speaker: Michael Clarage, Brainsell Technologies
"Electric Double Layers and Birkeland currents in Astronomy"
Abstract: Electric fields and electric currents have been traditionally under emphasized in astrophysics. Over the past several decades in-situ satellite measurements and improved remote sensing techniques have revealed many electric phenomena around all planets, between planets and moons, on stars, and even at the galactic level. This talk uses the fundamental plasma physics models of electric double layers and Birkeland currents as a starting point for an electric vocabulary in astrophysics.  






Tuesday, May 26, 2015
Brandeis University
MRSEC Seminar
Speaker: George Nounesis, Biomolecular Physics Laboratory National Centre for Scientific Research “Demokritos”
"Nanoparticles dispersed in liquid crystals: Adaptive targeting of topological defects"







Thursday, May 7, 2015
Brandeis University
MRSEC Seminar
Speaker: Wesley Wong, Children's Hospital Harvard 
"Mechanical Force in Nanoscale Biology: From hemostasis to single-molecule centrifugation"






Wednesday, May 6, 2015

Brandeis University
MRSEC Executive Committee Meeting







Thursday, April 30, 2015
Brandeis University
MRSEC Seminar
Speaker: Manis Chaudhuri, SEAS Harvard
"Exploring strong coupling phenomena in classical many body systems: from dusty plasma to colloids"





Monday, April 20, 2015
Brandeis University
MRSEC Seminar
Speaker: Silke Henkes, University of Aberdeen, Dept of Physics
"Active matter, curvature and confinement"






Thursday, April 16, 2015
Brandeis University
MRSEC Seminar
Speaker: Tony Gao, Courant Institute, NYU
"Modeling and Simulation in Complex Fluids: From Passive to Active Systems"





Wednesday, April 8, 2015

Brandeis University
MRSEC Executive Committee Meeting





Thursday, April 2, 2015
Brandeis University
MRSEC Seminar
Speaker: Nesrin Senbil, UMASS Amherst Dept of Physics
"How contact line deforms around a sphere at a liquid interface: Effect of interface shape, roughness"




Thursday, March 19, 2015
Brandeis University
MRSEC Seminar
Speaker: Roy Ziblat, Wyss Institute at Harvard
"Determining the specificity of proteins to lipid compositions by combinatorial screening of lipid membranes"
Tuesday, March 10, 2015
Brandeis University
MRSEC Seminar
Speaker: Dr. Elizabeth Stewart, Chemical Engineering, University of Michigan, Ann Arbor
"Microstructure, Mechanics, and Self-assembly of Natural and Artificial Staphylococcal Biofilms"




Wednesday, February 11, 2015

Brandeis University
MRSEC Executive Committee Meeting






Wednesday, January 21, 2015

Brandeis University
MRSEC Executive Committee Meeting

Wednesday, December 17, 2014 
Brandeis University
Executive Committee Meeting




Thursday, December 4, 2014 
Brandeis University
MRSEC Seminar
Speaker: Michael Juniper, Brandeis Physics
"Dynamic mode locking in a driven colloidal system"




Monday, November 24, 2014 
Brandeis University
MRSEC Seminar
Speaker: Jayson Paulose, Dept. of Physics, Leiden University 
"Topological modes bound to lattice dislocations in mechanical metamaterials"




Friday, November 21, 2014 
Brandeis University
MRSEC On-Campus Retreat





Thursday, November 20, 2014 
Brandeis University
MRSEC Seminar
Speaker: Guillaume Duclos, Institute Curie
"Nematic order and defect dynamics in a fibroblast tissue"
Wednesday, November 19, 2014 
Brandeis University
Executive Committee Meeting




Friday, November 14, 2014 
Brandeis University
MRSEC PREM 




Friday, November 7, 2014 
Brandeis University
MRSEC Seminar
Speaker: David L. Hu, Dept. of Mechanical Engineering Georgia Tech
"Fire ant rafts assemble, morph and repair"




Thursday, October 16, 2014 
Brandeis University
MRSEC Seminar
Speaker: Thomas Miller, Dept of Chemistry, Caltech
"Regulation of Sec-Facilitated Protein Translocation and Membrane Integration"



Wednesday, October 15, 2014 
Brandeis University
Executive Committee Meeting




Friday, September 19, 2014

Brandeis University
New England Complex Fluids Workshop

Thursday, September 18, 2014 
Brandeis University
MRSEC Seminar
Speaker: Anupam Sengupta, Dept. of Civil and Environmental Engineering at MIT
"Towards Topological Microfluidics: Harnessing surface, elastic and viscous interactions at micro-scales"
 




Monday, September 15, 2014 
Brandeis University
Chemistry Seminar
Speaker: Jonathan Wilker, Purdue University
"Chemistry at the Beach:  Characterization, Synthetic Mimics, and Applications of Shellfish Adhesives"





Thursday, September 4, 2014 
Brandeis University
MRSEC Seminar
Speaker: Douglas Brumley, MIT Dept of Civil and Environmental Engineering
"Flagellar Synchronization Through Direct Hydrodynamic Interactions"






Thursday, August 28, 2014 
Brandeis University
MRSEC Seminar
Speaker: Chandan Dasgupta, Indian Institute of Science, Bangalore
"Complex Rheology of Nematogenic Fluids: Connection to Elastic Turbulence"




Thursday, August 21, 2014 
Brandeis University
MRSEC Executive Committee Meeting
Wednesday, August 20, 2014 
Brandeis University
MRSEC Summer Seminar
Speaker: Joia Miller
"Chirality and Raft Formation in 2D Colloidal Membranes"
Speaker: Charlotte Kelley
"Self-assembly of Nwk drives F-BAR domain mediated membrane remodeling"




Thursday, August 14, 2014 
Brandeis University
MRSEC Seminar
Speaker: Yaouen Fily, Brandeis University
"Active particles under strong boundary confinement"


Wednesday, August 6, 2014 
Brandeis University
MRSEC Summer Seminar
Speaker: Gabriel Redner
"More for Less:  Enhanced Sampling Techniques in Simulation"
Speaker: Stephen DeCamp
"Directed Motion in an Active Matter System"


Thursday, July 24, 2014 
Brandeis University
MRSEC Seminar
Speaker: Tim Still, Dept. of Physics at University of Pennsylvania
"Colloidal Hydrogel Particles, Glass Transition, Jamming, and Friction"




Wednesday, July 23, 2014
Brandeis University
MRSEC Summer Seminar (Mechanisms of Genetic Maintenance)
Speaker: Vinay Eapon (Haber Lab)
"DNA Damage Response and Cell Cycle Control"
Speaker: Cara Pina (Lovett Lab)
"Cellular DNA organization and the problem of keeping rope tangle free"





Thursday, July 17, 2014 
Brandeis University
MRSEC Seminar
Speaker: Alfredo Alexander-Katz, Department of Materials Science and Engineering at MIT
"A New Path for Nanoparticles: Toward Fully Synthetic Protein Mimics and Beyond"





Thursday, July 17, 2014 
Brandeis University
MRSEC Executive Committee Meeting





Friday, July 11, 2014 
Brandeis University
MRSEC Seminar
Speaker: Jean-Francois Joanny, ESPCI
"Physics of Epithelial Tissue layers"




Wednesday, July 9, 2014 
Brandeis University
MRSEC Summer Seminar
Speaker: Sandeep Choubey, Kondev Group
"Deciphering transcriptional dynamics in vivo by counting nascent RNA molecules"
Speaker: Larry Tetone, Gelles Group
"Reprogramming a macromolecular machine: How GreB interacts with RNA polymerase"





Thursday, July 3, 2014
Brandeis University
MRSEC Seminar
Speaker: Jerald Dumas, Hampton University
"Protease sensitive technologies for rapid cancer detection and tissue engineered models of bone metastases"


 
Thursday, June 26, 2014 
Brandeis University
MRSEC Executive Committee Meeting




Thursday, June 26, 2014 
Brandeis University
MRSEC Seminar
Speaker: Bryan Chen, Instituut-Lorentz for Theoretical Physics, Leiden University
"Topological soft matter: from linkages to kinks"




Wednesday, June 25, 2014
Brandeis University
MRSEC Summer Seminar Series
(Molecular Engineering for Active Materials and Self Assembly)
Speaker: Ye Zhang, Brandeis University
"Bottom-up Molecular Engineering for Active Materials"
Speaker: Junfeng Shi, Brandeis University
"Pericelluar Hydrogelation of D-peptide to Inhibit Cancer Cell"




Thursday, June 19, 2014 
Brandeis University
MRSEC Seminar
Speaker: Adrian Serohijos, Dept. of Chemistry at Harvard University
"Interplay between protein biophysics and population demography in evolution"


Thursday, June 12, 2014 
Brandeis University
MRSEC Seminar
Speaker: Ye Zhang, Brandeis University, Dept. of Chemistry
"Smart Materials Built on Ru(bipy)3 Derivatives"



Wednesday, June 11, 2014
Brandeis University
MRSEC Summer Seminar Series
(Maintaining the size of cellular structures. An example from the yeast cytoskeleton.)
Speaker: Julian Eskin, Brandeis University
"Formin regulation controls budding yeast actin cable length and shape"
Speaker: Lishibanya Mohapatra, Brandeis University
"How do cells build structures of a particular size?"


Thursday, June 5, 2014 
Brandeis University
MRSEC Seminar
Speaker: Arvind Murugan, Harvard University
"Design principles for heterogeneous materials synthesis: Lessons from biology"



Thursday, May 29, 2014 
Brandeis University
MRSEC Seminar
Speaker: Nate Tompkins, Brandeis University, Dept. of Physics
"Testing Turing's Theory of Morphogenesis in Chemical Cells (How the Leopard Got Its Spots)"
Friday, May 16, 2014 

Brandeis University
Research Elevator Talks and Grad Student Social



Thursday, May 15, 2014 
Brandeis University
MRSEC Seminar
Speaker: Tony Dinsmore, Dept. of Physics, UMASS Amherst
"Fluid membranes and proteins: binding and bending under tension"



Wednesday, May 7, 2014
Brandeis University
Olin/Brandeis MRSEC Engineering Project Presentations
Speaker: Elliott Donlon, Suzy Hong, Kathryn Lau, Avery Louie, Katherine Stegner, Markus Ludwig, Alison Wu
"Collaborative Senior Capstone Project with Olin College of Engineering: Rapid Prototyping of Microfluidic Foil Chips"



Friday, May 2, 2014 
Brandeis University
MRSEC Executive Committee Meeting


Thursday, April 24, 2014 
Brandeis University
MRSEC Seminar
Speaker: Baris Avsaroglu, Brandeis University
"Polymer model of a genetic switch: Chromosome folding-mediated DNA recombination during yeast mating type switch"



Wednesday, April 9, 2014 
Brandeis University
MRSEC Executive Committee Meeting


Thursday, April 3, 2014 
Brandeis University
MRSEC Seminar
Speaker: Catherine Kuo, Dept. of Biomedical Engineering at Tufts
"Mechanical Regulation of Tenogenesis: Instructions from the Embryo"
 

Thursday, March 27, 2014 
Brandeis University
MRSEC Seminar
Speaker:  Kenny Breuer, Division of Engineering at Brown University
"Viscosity, Elasticity and Bacterial Motility"




Tuesday, March 25, 2014 
Brandeis University
MRSEC Executive Committee Meeting



Thursday, March 20, 2014 
Brandeis University
MRSEC Seminar
Speaker:  Yao Lin, University of Connecticut, Dept. of Chemistry
"Supramolecular Polymerizations: Incorporating Cooperativity into Macromolecule and Macromolecular Assemblies"



Thursday, March 13, 2014

Brandeis University
MRSEC Seminar
Speaker: Jeff Urbach, Dept. of Physics at Georgetown University 
"Mechanical and structural sensitivity of axon growth"



Thursday, February 27, 2014
 
Brandeis University
MRSEC Seminar
Speaker: Lyderic Bocquet, MIT
"Nanofluidic Transport in nanotubes: applications to osmotic energy harvesting"
 
Thursday, February 20, 2014 
Brandeis University
MRSEC Seminar
Speaker: Thomas Waigh, Dept. of Physics at Univ. of Manchester
"Microrheology of Complex Fluids"




Thursday, February 13, 2014 
Brandeis University
MRSEC Seminar
Speaker: Randall Erb, Dept. of Mechanical & Industrial Engineering, Northeastern University 
"Manufacturing Ordered Composites with Colloidal Assembly"


Thursday, February 6, 2014 
Brandeis University
MRSEC Seminar
Speaker:  Zhigang Suo, Harvard University, SEAS
"Soft Materials and Soft Machines"



Monday, February 3, 2014

Brandeis University
MRSEC Executive Committee Meeting




Tuesday, January 28, 2014

Brandeis University
MRSEC-Sponsored Physics Colloquium
Speaker: Leif Ristroph, Courant Institute at New York University
"Learning aerodynamics from insects and dreaming up new ways to fly"




Thursday, January 23, 2014
Brandeis University
MRSEC Seminar
Speaker:  Jerome Fung, Brandeis University
"Measuring the 3D Dynamics of Multiple Colloidal Particles with Holographic Microscopy and Electromagnetic Scattering Solutions"
 




Thursday, December 12, 2013 
Brandeis University

MRSEC Seminar

Speaker:  Jason Perlmutter, Brandeis University

“Simulations of Capsid Assembly around Polyelectrolytes or Nucleic Acids”




Wednesday, December 11, 2013 
Brandeis University

Collaborative Senior Capstone Project with Olin College of Engineering Mid-Year Update

Presenters: Elliott Donlon, Suzy Hong, Kathryn Lau, Avery Louie, Katherine Stegner and Markus Ludwig

“Rapid Prototyping of Microfluidic Foil Chips”



Thursday, December 5, 2013
                         
Brandeis University
MRSEC Seminar
Speaker:  Isaac Krauss, Brandeis University, Chemistry 
"Clustering Carbohydrates on DNA and Peptides to Mimic HIV"




Monday, December 2, 2013 

Brandeis University
MRSEC Executive Committee Meeting



Tuesday, November 26, 2013 
Brandeis University
MRSEC Seminar
Speaker: Alex Evilevitch, Department of Physics, Carnegie Mellon University
"Solid-to-Fluid DNA Transition in Viruses Facilitates Infection"



Monday, November 25, 2013 

Brandeis University
MRSEC Seminar
Speaker: Charles Reichhardt, Los Alamos National Laboratory, Theoretical Division  
"Self-Organization, Fluctuation Forces and Transport of Active Matter On Disordered Landscapes"



Friday, November 22, 2013

Brandeis University
MRSEC On-Campus Retreat




Thursday, November 21, 2013

Brandeis University
MRSEC Seminar
Speaker: Tom Powers, Division of Engineering and Department of Physics at Brown University
Swimming in Complex Fluids”




Thursday, November 14, 2013
Brandeis University
MRSEC Seminar
Speaker: Berengere Abou, CNRS and Paris Diderot University 
"Microrheology in the beetle secretion"


                        
Thursday, November 7, 2013

Brandeis University
MRSEC Seminar
Speaker: Moumita Das, Department of Physics at Rochester Institute of Technology
"The cell cytoskeleton as a composite: mechanics and force transmission"


                         


Wednesday, November 6, 2013 

Brandeis University
MRSEC Executive Committee Meeting




Tuesday, November 5, 2013
 
Brandeis University
MRSEC-Sponsored Physics Colloquium
Speaker: Efi Efrati, University of Chicago
"Orientation dependent handedness and chiral design"



Thursday, October 31, 2013
 
Brandeis University
MRSEC Seminar
Speaker: John Lisman, Brandeis University
"A Potential Solution to the Mechanism of Memory Storage in the Brain"



Thursday, October 24, 2013     
                   

Brandeis University
MRSEC Seminar
Speaker:  Dirk Albrecht, WPI, Department of Biomedical Engineering 
"Microtechnologies for high-content, high-throughput neuroscience"



Thursday, October 17, 2013
                   

Brandeis University
MRSEC Seminar
Speaker: John Pojman, Louisiana State University, Dept. of Chemistry
"Fabrication and Characterization of Stable Hydrophilic Microfluidic Devices Using Acrylate Chemistry"



Wednesday, October 16, 2013 
  

Brandeis University
MRSEC Executive Committee Meeting





Friday, October 11, 2013 

Brandeis University
MRSEC Seminar
Speaker:  Prerna Sharma, Brandeis University
"Self-Assembly of Colloidal Rafts"




Thursday, October 3, 2013 

Brandeis University
MRSEC Seminar
Speaker: Martin Loose, Department of Systems Biology at Harvard Medical School 
"The bacterial cell division proteins FtsA and FtsZ self-organize into dynamic cytoskeletal patterns"



Thursday, September 26, 2013
Brandeis University
MRSEC Seminar
Speaker: Alberto Perez Muñuzuri, Univ. de Santiago de Compostela, Department of Physics
"Pattern formation in liquid reaction-diffusion systems, coupling with hydrodynamic instabilities"



Thursday, September 19, 2013 

Brandeis University
MRSEC Seminar
Speaker: Niels Holten-Andersen, MIT, Department of Materials Science Engineering 
"Metal-coordination: Using one of Nature’s tricks in new polymer material design"



Tuesday, September 17, 2013 

Brandeis University
MRSEC-Sponsored Physics Colloquium
Speaker: Robert Holyst, Polish Academy of Sciences
"Biologistics:Mobility in cytoplasm of the eukaryotic and prokaryotic cells"



Thursday, September 12, 2013 

Brandeis University
MRSEC Seminar
Speaker: James Puckett, Yale University, Department of Mechanical Engineering
"Interactions in insect swarms: beyond attraction and repulsion"




Monday, September 9, 2013    

Brandeis University
MRSEC Executive Committee Meeting


Tuesday, August 27, 2013 

Brandeis University
MRSEC Seminar
Speaker: Sindy Tang, Stanford University, Department of Mechanical Engineering 
"Leaky Droplets"



Thursday, August 15, 2013

Brandeis University
MRSEC Seminar
Speaker: Roy Beck Barkai, School of Physics and Astronomy, Tel-Aviv University
"Order and disorder in biological complexes"


Monday, August 12, 2013

Brandeis University
MRSEC Seminar
Speakers: Iskra Staneva, Cambridge University; Naomi Chayen, Imperial College
"How simulations can explain aspects of protein crystallization"; "Smart Materials for Protein Crystallization"



Tuesday, August 6, 2013
Harvard University
Microfluidics Mini-Symposium over Dinner 
Dr. Ramses Martinez, Harvard University: “Paper-Based Microfluidics”
Dr. Mehmet Dokmeci, Harvard Medical School: “Microfabrication and Microfluidics Technologies for Tissue Engineering”
Dr. Brian Hutchinson, RainDance Technologies: “Droplet Microfluidics Technology Enabling Single-Molecule Interrogation for Cancer Research”
Prof. Seth Fraden, Brandeis University: “Less is Better than More in Microfluidics”



Thursday, August 1, 2013

Brandeis University
MRSEC Seminar
Speaker: Dan Chen, Brandeis University
"Tangled up in goo: mechanics and rheology of motorized filamentous materials"

Monday, July 15, 2013    

Brandeis University
MRSEC Executive Committee Meeting


Friday, July 12, 2013                         

Brandeis University
MRSEC Seminar
Speaker: Richard Sear, University of Surrey
"‘Chaos is a friend of mine’: How random is the nucleation of crystals?"


Tuesday, June 11, 2013  

Brandeis University
MRSEC Seminar
Speaker: Cristian Micheletti, International School for Advanced Studies (SISSA)
"DNA knotting inside viral capsids"

Thursday, June 6, 2013  

Brandeis University
MRSEC Seminar
Speaker: Mo Khalil, Dept. of Biomedical Engineering, Boston University
Programmable biology: circuits for programming the inside and outside of cells”




Thursday, May 30, 2013

Brandeis University
MRSEC Seminar
Speaker: Cristian Staii, Dept. of Physics and Astronomy, Tufts University
"Cytoskeletal dynamics of living neurons measured by combined fluorescence and atomic force microscopy"


Wednesday, May 29, 2013

Brandeis University
MRSEC Executive Committee Meeting




Thursday, May 9, 2013                     

Brandeis University
MRSEC Seminar
Speaker: Patrick Underhill, Dept. of Chemical and Bilogical Engineering, RPI
"Collective behavior in suspensions of swimming microorganisms"



Monday, May 6, 2013

Brandeis University
Speaker: Olin SCOPE Team
Olin Capstone MRSEC Final Project Presentation



Thursday, May 2, 2013

Brandeis University
MRSEC Seminar
Speaker: Greg Grason, Dept. of Polymer Science & Eng., UMASS Amherst
"Frustration & Optimal Packing in Soft Assemblies:  from Spherical Crystals to Twisted Filaments Bundles (and back again)"


Sunday, April 28, 2013

Discovery Museum Visit in Acton
Part of upcoming workshop "Indiana Jones and the Temple of Science

Thursday, April 25, 2013

Brandeis University
MRSEC Seminar
Speaker: Sarah Olson, Dept. of Mathematical Sciences, WPI
"Integrative models of sperm motility"



Wednesday, April 24, 2013

Brandeis University
MRSEC Executive Committe Meeting



April 18, 2013

Brandeis University
MRSEC Seminar
Speaker: Tim Atherton, Tufts University
"The role of geometry of in directing self-assembly"



April 17, 2013

Brandeis University
Art of Science Lecture series
Speaker: Debbie Chacra, Professor, Olin College of Engineering
Chacra's work in material science and biometrics


 

April 10, 2013

Brandeis University
MRSEC Seminar
Joseph Paulsen, Dept. of Physics, University of Chicago
"Things Come Together: Experiments on Liquid Drop Coalescence"


March 13, 2013

Brandeis University
Art of Science Lecture Series
Dianna Dabby, Professor, Olin College of Engineering
"Creating Musical Variation - from Chaos"
Additional info at: http://www.brandeis.edu/programs/wgs/news/womeninscience.html




March 07, 2013

Brandeis University
Sukho Park, Chonnam University, Korea
"Microrobots for biomedical application"
February 28, 2013

Brandeis University
Carole Perry, Dept. of Chemistry, Nottingham Trent University
"Understanding chemical interactions at the bio-nanomaterial interface - progress towards the development of new materials"



 
February 21, 2013

Brandeis University
Lisa Burton, Dept. of Mechanical Engineering, MIT
"How to move: The dynamics and kinematics of swimming"
February 20, 2013

Brandeis University
Azadeh Samadani, Dept. of Physics, Brandeis University
Active Matter Workshop




February 14, 2013

Brandeis University
Jane' Kondev, Dept. of Physics, Brandeis University
"Do cells care about entropy?"
February 06, 2013

Brandeis University
Ed Banigan, Dept of Phyisics, Univ. of Pennssylvania
"Repelling invasion: cell motility and the immune defenses"
January 31, 2013

Brandeis University
 Shima Parsa, Dept. of Physics, Wesleyan University
"Rotation and alignment of rods in fluid flows"
December 24 , 2012

Brandeis University
Peter Yunker, Dept. of Physics, Harvard University
"Effects of Particle Shape on Evaporating Drops of Colloidal Suspensions: From Uniform Coatings to Universal Growth Processes"
December 20 , 2012

Brandeis University
Yeng-Long Chen, Institute of Physics, Academia Sinica, Taiwan
"Conformation and dynamics of polymers and soft particles in micro- and nano-fluidic channels"
December 13 , 2012

Brandeis University
Christian Santangelo, Dept. of Physics, UMass Amherst
"Using growth and folding to shape elastic sheets"
December 12 , 2012

Brandeis University
Brandeis-Olin College Joint Project Presentation
Speakers: Scope Team: Lillian Tseng, Benjamin Smith, Torie Hamilton, Jeff Hart, Camille Girabawe (Brandeis)
Title: Brandeis/Olin Mid-Year presentation: "Drop-on-Demand Microfluidics Platform"
Sponsored by: NSF/MRSECept. of Applied Physics and Molecular Cell Biology, Harvard University
December 06 , 2012

Brandeis University
Daniel Needleman, Dept. of Applied Physics and Molecular Cell Biology, Harvard University
"The Metaphase Spindle as an Active Liquid Crystal"




November 29 , 2012

Brandeis University
Tuomas Knowles, Dept. of Chemistry, Cambridge University
"Biophysics of protein aggregation"  
November 18 , 2012

Brandeis University
Melissa Kosinski-Collins, Brandeis University
"Pirate Science at the Acton Discovery Museum"  
Brandeis MRSEC group hosted "Pirate Science Day" at the Acton Discovery Museum.  They sponsored a series of engineering and physics activities for elementary school children.  Also sponsored 5 stations of hands-on activities asking students to build, construct and engage in the science of the pirate age. 
November 15 , 2012

Brandeis University
Raymond Samuel, Dept. of Chemical Engineering, Hampton University 
"Atypical growth behavior of DNA multilayer thin films"
November 7 , 2012

Brandeis University
Raghunath Chelakkot,  Dept. of Physics, Brandeis University 
"Flagella-like beating of connected, self-propelled, Brownian particles"




November 1 , 2012

Brandeis University
Alfred Redfield,  Emeritus, Dept. of Physics, Brandeis University 
"Sub-Tesla Nuclear Spin Relaxation in Complex Fluids: Accomplishments and Speculations"
October 25 , 2012

Brandeis University
Michael Giver, Brandeis University 
"Patterns and Oscillations in Noisy Reaction-Diffusion systems"
October 11-12 , 2012

Brandeis University                       
NSF site visit schedule

Abelson sessions open to MRSEC PIs only
Lunch for students by invitation
Poster sessions open to all (Shapiro Science Atrium)




October 12 , 2012

Brandeis University   
Fall FEST Science Fest                    
The fall fest committee took students and their families to the Museum of Science in Boston on Friday, October 12th of the Fall Fest weekend. Before leaving, MRSEC students were asked to greet the families and have demonstrations and exhibits on the work they do in the lab from 3-4 pm in the SSC atrium. Headed by Melissa Konsinski-Collins.




October 04 , 2012

Brandeis University
Jay Tang, Dept. of Physics, Brown University 
"Trapped at the surface: How a flagellated bacterium probes molecular absorption and viscosity at the air-liquid interface"
September 26, 2012

Brandeis University
Heinrich Jaeger, Dept of Physics, U. Chicago
"Self-Assembled Nanoparticle Membranes"   




September 20, 2012

Brandeis University
Andela Saric, Dept. of Chemistry, Columbia University
"Deformable Surfaces as a Platform for Particle Self-assembly"     
   


September 14, 2012

Brandeis University
External Advisory Board Meeting (open to all MRSEC members)    
    


September 13, 2012

Brandeis University
Anindita Basu, Dept of Physics, Harvard University   
" Shear deformation in polymer gels and dense collodial suspensions"  



September 04, 2012

Brandeis University
Venkatranmanan P. R., Raman Research Instituten  
" A modulated phase in smectic-C liquid crystals and the structure of the TGB-C phase"
 



August 20, 2012

Brandeis University
Sebastian Seiffert, Helmholtz-Zentrum Berlin and Freie Universitat Berlin  
" Small but Smart: Sensitive ans Supramolecular Microgels"
 



August 9, 2012

Brandeis University
Jong-Oh Park, Dr.-Ing., Director, Robot Research Initiative [RRI] , Professor, School of Mechanical Systems Engineering, Chonnam National University 
" Current RRI Research Issues in Biomedical Robotics" 



July 23 , 2012

Brandeis University
Marcus Hauser, Dept. of Physics, Otto-von-Guericke-Universität Magdeburg
"Characteristics of the vein network of the slime mould Physarum polycephalum"




July 11, 2012

Brandeis University
Ullrich Steiner, Cavendish Laboratory, Cambridge University
"Biological, bio-inspired and biomimetic nano- and micro-structured materials"




June 25, 2012
Brandeis University
Ranjini Bandyopadhyay, Raman Research Institute
"Scaling behavior in the convection-driven Brazil nut effect"




June 15, 2012

Brandeis University
Francesc Sagués from the University of Barcelona, Dept. of Chemical Physics
"Photosensitive Langmuir monolayers: Chiral selection and liquid crystals patterning"
June 14, 2012

Brandeis University
 Christopher Harrison, Schlumberger-Doll Research, Cambridge
"Schlumberger:Microfluids in the oilfield"
June 07, 2012

Brandeis University
Jianhua Xing, Virginia Tech, Dept of Bilogical Sciences
"Learn how to design a nanomachine from bacteria"
May 24, 2012

Brandeis University
Hunter King, UMASS, Amherst , Dept. of Physics
"Wrinkling and Crumpling of Supported Thin Sheets"




May 10, 2012

Brandeis University
Viktor Horvath,  Dept. of Chemistry, Brandeis University
"Dynamic behavior of pulse-coupled chemical oscillators"




May 09, 2012

Brandeis University
Olin College Students, Olin College
Final Presentation
"Interrogation, merging, and sorting of microfluid droplets"




May 03, 2012

Brandeis University
Erkan Tuzel, Dept. of Physics, Worcester Polytechnic Institute
"The transport and deformations of cargo tracks in cells" 



April 26, 2012

Brandeis University
Rennie Mirollo, Dept. of Mathematics, Boston College
"Applications of Möbius group methods to the Kuramoto and other coupled oscillator models"
April 19, 2012

Brandeis University
Bin Liu,  Dept of Mechanical Eng., Brown University
"Helical swimming in complex fluid media"
April 05, 2012

Brandeis University
Silke Henkes, Dept of Physics, Syracuse University
"Active Glasses: Self-propelled particles at high density" 
April 03, 2012

Brandeis University
Joint MRSEC/Martin Weiner Colloquium
Michael Shelley,  NYU
"Biological Flow and Mechanics"
March 30, 2012

Brandeis University
Trush Majimudar, Courant Institute, NYU
"Experiments and theory of Undulatory Locomotion in Structured Media" 
March 27, 2012

Brandeis University
Joint MRSEC/Martin Weiner Lecture Series Colloquium
Jonathan Fisher, The Rockerfeller University
"Light and Sound: An optical approach for illuminating the elusive mechanics of hearing in the mammalian cochlea" 
March 22, 2012

Brandeis University
Sujit Datta, Dept. of Physics, Harvard University
"Between a Rock and a Pore Space: Imaging Multiphase Flow in 3D Porous Media"
March 15, 2012

Brandeis University
Thomas Butler, MIT
"Fluctuation driven Turing Patterns"
March 08, 2012

Brandeis University
Homin Shin, Dep. of Material Science, UIUC
"Self-assembly into "unusual" order or morphology: from patchy colloids to polymer vesicles"



February 23, 2012

Brandeis University
 Ning Li,  Dept. of Physics, Brandeis University
"Coupled oscillations in a  1D emulsion of Belousov-Zhabotinsky droplets"



February 09, 2012

Brandeis University
Sean Ling, Dept. of Physics, Brown University
"Nanopore DNA Sequencing: making a  Solid-State "Nanoporase" for Active Kinetc Proofreading"
February 02, 2012

Brandeis University
Shirley Ao, Chief Engineer, GE Sensing
"High Accuracy Ultrasonic Flow Measurement"

January 26, 2012

Brandeis University
Sridhar Seshan, Depts. of Physics & Chemistry, Brandeis University
"Controlling spatial patterns in excitable media (A tale of disease, dynamics, and doctorate)"
January 24, 2012

Brandeis University
Joint MRSEC/Martin Weiner Lecture Series Colloquium
William Irvine, University of Chicago
"Knotted Fields"



December 19, 2011
Brandeis University
Jin Seob Kim, Dept. of Biochemistry, John Hopkins University
"Modeling the Self-Organization of Keratin Intermediate Filaments"



December 15, 2011

Brandeis University
Yaouen Fily, Dept. of Physics, Syracuse University
"Self-propelled particles at high density"
December 14, 2011

Brandeis University
Olin College Scope Students, Oilin College
"Interrogation, merging, and sorting of microfluid droplets" 
December 09, 2011

Brandeis University
Jason Perlmutter, Dept. of Biomedical Eng., Univ. of Minnesota
"Computational Molecular Modelling of Membranes and Membrane Proteins"
December 08, 2011

Brandeis University
Romain Grossier, Dept of Mtl. Science and Engineering, MIT
"Microdroplets as confined systems: unusual access to nucleation"



December 01, 2011

Brandeis University
Joint MRSEC/Neuroscience Seminar
Shimon Marom, Faculty of Medicine, Haifa, Israel
"Interpretations of response fluctuations: neurons, networks, and simple behavior"



November 30, 2011

Brandeis University
 Brandeis MRSEC External Advisory Meeting
November 17, 2011

Brandeis University
Narayanan Menon, Dept. of Physics, UMass, Amherst
 "Emergence of shape in thin elastic sheets" 
November 10, 2011

Brandeis University
Prerna Sharma, Dept. of Physics, Brandeis University
"Dynamics of Interfaces"


November 4, 2011

Brandeis University
Paul Garrity, Dept of Biology, Brandeis University
"Overheated and highly irritated: thermal and chemical sensing from the Cambrian to the sushi bar"


October 7, 2011

Brandeis University
Biochemistry-Biophysics Pizza Talk


September 01, 2011

Brandeis University
 Jian Liu, NIH (Laboratory of Computational Biology)
"Mechanochemistry of endocytosis"


August 26, 2011

Brandeis University
Shashi Thutupalli, Max Planck Institute for Dynamics and Self-Organization"
"Swarming behavior of simple model squirmers"


August 24, 2011

Brandeis University
Professor Annette Zeppelius, Univ. of Gottingen, Germany
"Structure and elasticity of anisotropic macromolecular networks"
August 12, 2011

Brandeis University
Jure Dobnikar, University of Cambridge
"Self-assembly and emergent dynamics of magnetic colloids" 
July 21, 2011

Brandeis University
 Taniki Yanagishima, Cavindish Laboratory, Cambridge (UK)
"Real time monitoring of complex  moduli from micro-rheology"  
July 15, 2011

Brandeis University
Prof. Richard Sear, Dept. of Physics, Univ. of Surrey (UK)
"Dynamics of the Muscular-Dystrophy Protein in Muscle Fiber Cells"  
July 13, 2011

Brandeis University
MRSEC BZ Bootcamp Workshop
Attendance was by invitation
All day event
Hosts: S. Fraden, I. Epstein
June 16, 2011

Brandeis University
Lawrence Wilson, Roland Institute (Harvard)
Title:  "Quantitative Hi-speed Imaging of Mobile Microorganisms"


June 8, 2011

Brandeis University
Dibyendu Das, Assoc. Professor (Physics Dept), IIT, Bombay, India
Pedagogical lectures meant for graduate students
Title:  "Lectures on Stochastic Processes"
 

June 7, 2011

Brandeis University
Dibyendu Das, Assoc. Professor (Physics Dept), IIT, Bombay, India
Title:  "A model for collective cell migration"
June 6, 2011

Brandeis University
Prof. Abraham Atta Ogwu, Thin Film Centre, Univ. of West Scotland, UK
Title:  "International Education development and biomaterials research at the Kigali Institute of Science and Technology, Rhuanda"
May 20, 2011

Brandeis University
Dr Rene van Roij, Institute for Theoretical Physics Leuvenlaan 4 (Netherlands)
Title:  "Liquid crystals in colloidal mixtures: how flexible needles become obese and biaxial rods schizophrenic"

 
April 28, 2011
Brandeis University
Anand Bala Subramanian, Harvard University
Title:  "Lipid membrane biophysics on topographically patterned and glycan-coated surfaces"
April 21, 2011

Brandeis University
Yuan Gao
Title:  "Molecular Self-Assembly for Making Gels Outside and Inside Cells"

April 14, 2011
Brandeis University
Prof. Greg Huber, University of Connecticut Health Center
Title:  "Membranes, curvature, and ER"


March 18, 2011

Brandeis University
Victor Rühle, Max Planck Institute for Polymer Research (Germany)
Title:  "A multiscale description of charge transport in organic semiconductors"
March 17, 2011

Brandeis University
Meredith Betterton, Univ. of Colorado (at Boulder)
Title: "Coupled aggregation and liquid-crystalline order: Theory and Monte Carlo Simulation"
March 10, 2011

Brandeis University
Cristina Berciu, Brandeis University
Title: "Introduction to Correlative Light and Electron Microscopy"
February 24, 2011

Brandeis University
Dr Apala Majumdar, University of Oxford
Title: "The Mathematics of Liquid Crystals - Analysis, Computation, and Applications"
February 17, 2011

Brandeis University
Jennifer Schwartz, Syracuse University
Title: "Modeling the actin cytoskeleton at the leading edge of a crawling cell: Lamellipodia and Filopodia"
December 9, 2010

Brandeis University
Adam Cohen, Harvard University
Title: "Controlling Molecules with Electromagnetic Fields"
December 3, 2010

Brandeis University
MRSEC/Biophysics Joint Seminar
Pankaj Mehta, Boston University
Title: "Communication and Collective Behavior in Unicellular Organisms"
December 2, 2010

Brandeis University
MRSEC EternalAdvisory Board Meeting
EAB Members:
Rama Bansil, BU
Alan Hurd, Los Alamos National Lab
Arjun Yodh, U. Penn
Nicholas Abbot, U. Wisconsin  

November 18, 2010
Brandeis University
Hector Gonzalez-Ochoa, Brandeis University
Title:  "Active Emulsions: Coupled Chemical Photosensitive Oscillators"


November 17, 2010
Brandeis University
Luncheon with MRSEC Director, Robert Meyer
Faculty Club  
November 15, 2010
Brandeis University
Elisabetta Matsumoto,University of Pennsylvania
Title:  "Defects in Smectics A: From Focal Conics Domains to the Helical Nanofilament Phase"  
November 4, 2010

Brandeis University
Madhavi Krishman, Technische Hochscule Zürich
Title:  "Geometry-induced electrostatic trapping, levitation, and assembly of nanometric objects in a fluid"  


October 14, 2010

Brandeis University
Shashi Murthy, Northeastern University
Title:  "Bio-adhesive Microfluidic Channels in Clinical Medicine & Basic Science"  


October 7, 2010

Brandeis University
Melick C. Demirel, Ph.D., Visiting Scholar at Wyss Institute, Harvard University
Associate Professor, Pennsylvania State University
Title:  "A Bio-inspired Nanofilm with Unidirectional Properties"  


Sept 13, 2010

Brandeis University
Prof. Adrian Parsegian, Univ. MA, Amherst, Dept. of Physics
MRSEC / Chemistry Combined Seminar
Title:  "Big Molecules in small places --packing and pushing of flexible polymers in concentrated solutions and in protein channels"  


Sept 9, 2010

Brandeis University
Zahera Jabeen, Brandeis University
MRSEC Seminar
Title:  "Universal Scaling Dynamics in perturbed granular gas"  


Sept 3, 2010

Brandeis University
Prof. Peter D. Olmsted, School of Physics and Astronomy, Univ of Leeds, UK
MRSEC Seminar
Title:  "Membrane interactions with surfaces, soaps, and proteins"  


Sept 2, 2010

Brandeis University
Dieter W. Heermann, University of Heidelberg
MRSEC Seminar
Title:  "Ring Polymers, Entropy and Confinement"  


July 30, 2010

Brandeis University
Arvind Gopinath, MIT
MRSEC Seminar
Title:  "Getting Stuck"  


July 29, 2010

Brandeis University
David Kong, MIT
MRSEC Seminar
Title:  "Microfluidic Synthesis of Membrane Proteins for an Olfactory Receptor-Based Odorant Biosensor"


July 27, 2010

Brandeis University
Magdaleno Medina, Institute of Physics (San Luis Potosi, Mexico)
MRSEC Seminar
Title:  "Glass Transition, irreversible Processes, and Aging in Collodial Suspensions"

July 21, 2010

Brandeis University
Daniel Tien-Nang Chen
MRSEC Seminar
Title:  "Microrheology of Soft Matter"


July 15, 2010
Brandeis University
Sirsish Kaushik Lakkaraju, Texas A & M University
MRSEC Seminar
Title:  "Elasticity of α-helices and coiled-coils: Role in Tropomyosin and the stalk of Kinesin-14 Ncd"

       


July 13, 2010
Brandeis University
Christian Hentrich, EMBL, Heidelburg Germany
MRSEC Seminar
Title:  "How crosslinking mitotic kinesins organize microtubules in vitro"       
June 17, 2010
Brandeis University
Yue Hu, Wellesley College
MRSEC Seminar
Title:  ""The role of surfactants in suppressing aging to silica-PDMS gels"      
June 10, 2010
Brandeis University
Mark Williamson, Northeastern University
MRSEC Seminar
Title:  "Force-induced DNA interactions: From small molecules to viral replication      


June 3, 2010
Brandeis University
Anna Balazs, Univ. of Pittrsburgh
MRSEC Seminar
Title:  "Self-Oscillating Gels as Mechano-responsive Materials"    


May 18, 2010
Brandeis University
Laurence Navailles, CRPP (Centre de Recherche Paul Pascal) , France
MRSEC Seminar
Title:  "Confinement Induced Phase Transition in a DNA-Lipid Hydrated Complex"    


May 13, 2010
Brandeis University
Jingshan Zhang, Research Associate, Harvard University
MRSEC Seminar
Title:  "Optimality in Affinity Maturation of antibodies"   


May 6, 2010
Brandeis University
Daan Frenkel, Cambridge University
MRSEC Seminar
Title:  "Dense packing and beyond" 


May 5, 2010
Brandeis University
Andrew Spakowitz, Chemical Engineering, Stanford University
MRSEC Seminar
Title:  "Physical Mechanisms for the Reading and Storage of Genomic DNA"Dense packing and beyond" 
April 30, 2010
Brandeis University
Olin College Scope Team
MRSEC Seminar
Title:  "Imaging Platform for Control and Measurement of Microfluidic Applications"
 
April 28, 2010
Brandeis University
Thomas Gibaud & Nadir Kaplan, Brandeis University
MRSEC Seminar
Title:  " The Effect Chirality on Self-Assembly of attractive rod-like particles"
 
April 14, 2010
Brandeis University
Prof. Leonid Mirny, MIT
MRSEC Seminar
Title:  "Biophysics of Protein-DNA Recognition and DNA Folding" 


April 9, 2010
Brandeis University
Madan Rao, Raman Research Institute/National Center for Biological Sciences, India
MRSEC Seminar
Title: "Active Clustering, Fluctuations and Stresses in Living Cells"


March 24, 2010
Brandeis University
Hyunmim Yi, Dep. of Chemical and Bilogical Engineering, Tufts University
MRSEC Seminar
Title: " Viral Templated Palladium Nanocatalysis"


March 18, 2010
Brandeis University
Shomeek Mukhopadhyay, Dept. of Chemistry, Columbia University
MRSEC Seminar
Title: " Packing Soft Spheres: From Jamming to Faceting"


March 15, 2010
Brandeis University
Sankha Bhowmick, U Mass Dartmouthy
MRSEC Seminar
Title: " Dessication Preservation of Mammalian Cells at Ambient Temperature: Experience in Bovine and Murine Sperm Model"
March 11, 2010
Brandeis University
Yoshiaki Uchida, Harvard University, Kyoto University
MRSEC Seminar
Title: " Paramagnetic Liquid Crystals without Metals"
March 5, 2010
Brandeis University
Younan Xia, Dept of Biomedical Eng., Washington University
MRSEC Seminar
Title: " Putting Nanomaterials to Work for Biomedical Research"


February 25, 2010
Brandeis University
Pascaline Mary, Harvard University
MRSEC Seminar
Title: " Microfluidic Stickers: An alternative to PDMS devices"


January 28, 2010
Brandeis University
Robert V. Lange, Brandeis University
MRSEC Seminar
Title: " An Organic Relationship: Materials Research and Projects for Health, Environmental Conservation, and Poverty Reduction in Africa"


January 14, 2010
Brandeis University
Peter Weigele, Staff Scientist, New England Biolabs, Inc
MRSEC Seminar
Title: " Biobatteries: Electricity from Microbes and Compost"
January 13, 2010

Brandeis University
Rob Shaw, ProtoLife Inc (S.F. , California)
MRSEC Seminar
Title: " Diffusion, Osmosis, and Parking Problems from Local Constraints to Macroscopic Transport"
December 17, 2009
 Brandeis University
Gautam Menon (IMSC, Chennai, India)
MRSEC Seminar
Title: " Stretching Fluctuations  and Loop Formation in Short Double-Stranded DNA Molecules"
December 10, 2009

Brandeis University
Luca Giomi, Brandeis University
MRSEC Seminar
Title: " Active Systems: Past and Future"


December 3, 2009
 Brandeis University
Marina Ruths, Dept. of Chemistry, University of Mass Lowell
MRSEC Seminar
Title: " Tribology of Confined Molecularly Thin Films"

December 2, 2009

Brandeis University
Erwin Frey. Ludwig-Maximilians-Universität München
MRSEC Seminar
Title: " Biopolymer Conformations and Dynamics"

November 19, 2009

Abelson 333, Brandeis University
Thomas Gibaud, Brandeis University
MRSEC Seminar
Title: " Yielding Dynamics of a Colodial Gel"

November 12, 2009

Brandeis University
Daniel Reeves, Brandeis University
MRSEC Seminar
Title: " Effect of rapid rebinding on biochemical rates: Theory and single molecule experiments"


October 22, 2009

Brandeis University
Chris Henley, Cornell University (visting Boston University)
MRSEC Seminar
Title: " Possible Mechanisms for Initiating Macroscopic Left-Right Symmetry in Animals and Plants"


October 15, 2009

Brandeis University
Oren Elrad, Brandeis University
MRSEC Seminar
Title: " Dynamic Encapsidation of Polymers by Icosahedral Viruses"

October 10, 2009

Brandeis University
Zvonomir Dogic, Brandeis University
Ce'sar A. Hidalgo, Harvard University
Christian Santangelo, UMass, Amherst
Patrick T. Underhill, Rensselaer Polytechnic Institute
Seminar
Title: "11th Annual greater Boston Area Statistical Mechanics Meeting"


October 1, 2009

Brandeis University
Patrick T. Underhill, Rensselaer Polytechnic Institute
MRSEC Seminar
Title: "Correlation in Suspensions of Swimming Microrganisms: Theory and Simulation"


September 18, 2009

Shapiro Theatre, Brandeis University
Complex Fluid Workshop
Jeremy Agresti, Harvard University  -  Aparna Baskaram, Syracuse University  -   Chris Santangelo, UMass Amherst    -  Wesley Wong, Rowland Institute@Harvard
Topics: active matter, droplet microfluids, self-folding origami, protein folding  with laser tweezers


Thursday, Sep 03, 2009

Brandeis University
MRSEC Seminar
Rumi De, Brown University
Title: "Dynamics of Cellular Response to Mechanical Stress"


Thursday, Aug 14, 2009

Brandeis University
MRSEC Seminar
J.F. Joanny, Institut Curie, Paris
Title: "Active Gels"


Thursday, Aug 13, 2009

Brandeis University
MRSEC Seminar
Stephen Hicks, Cornell University
Title: "Two Stories of Virus Assembly"


Thursday, Aug 6, 2009

Brandeis University
MRSEC Seminar
Joshua Blouwolff
Staff Scientist, US Genomics
Title: Us Genomics Direct Linear Analysis: DNA Mapping Using Microfluidic-Based, Single-Molecule Detection"
Host:  Host: Seth Fraden


Thursday, July 30, 2009

Brandeis University
MRSEC Seminar
Jorge Delgado
Brandeis University
Title: Simple Theories further away in wormlike micelles under shear
Host:  Host: Seth Fraden


Thursday, July 20, 2009

Brandeis University
MRSEC Seminar
Thibaut Divoux
Ecole Normale Superieure de Lyon, France
Title: On Creeping Flows in Complex Fluids
Host:  Host: Seth Fraden


Thursday, July 16, 2009

Brandeis University
MRSEC Seminar
Catherine Klapperich
Boston University
Title: Molecular Diagnostics in Plastic Microfluidics
Host:  Host: Seth Fraden


Thursday, May 21, 2009

Brandeis University
MRSEC Seminar
Eric Akkermans
http://physics.technion.ac.il/%7eeric
Yale University
Title: Dicke superradiance and Anderson localization of photons
Host:  Host: Seth Fraden


Thursday, May 14, 2009

Brandeis University
MRSEC Seminar
Jeffrey W . Ruberti
Northeastern University
Smart Matrix Theory. Is collagen a brilliant string or a dumb rope?
Host: Seth Fraden


Friday, May 8, 2009

Brandeis University 
MRSEC meeting
Schlumberger reps. meeting with Brandeis MRSEC Investigators
Host: Bulbul Chakraborty


Thursday, May 7, 2009

Brandeis University
Monthly MRSEC Meeting
Groups: Samadani, Dogic, Kondev
Subject: Confined Polymers


Wednesday, May 6, 2009

Brandeis University
MRSEC Seminar
Sean Calvo, Leif Jentoft
Olin College
"Automated Imaging Platform for Microfluidic Applications"
Host: Dongshin Kim


Thursday, April 30, 2009

Brandeis University
MRSEC Seminar
Eli Sloutskin
Harvard University
"Entropy in Crystal Nucleation of Hard Spheres"
Host: Seth Fraden


Thursday, April 23, 2009

Brandeis University
MRSEC Seminar
Wesley P. Wong
Harvard University
"Probing Single-molecule Kinetics with Optical Tweezers Techniques"
Host: Zvonomir Dogic


Friday, March 13, 2009

Brandeis University
MRSEC Seminar
David Lacoste
Laboratoire PCT, ESPCI (France)
"Active fluctuations in biology: single actin/microtubules filaments and active membranes"
Host: Bulbul Chakraborty


Thursday, March 12, 2009

Brandeis University
Monthly MRSEC Meeting
Subject: "Chiral Assembly"


Tuesday , March 3, 2009

Brandeis University
"Response and Fluctuations in Active Systems"
Andy Lau, Florida Atlantic University


Thursday , February 26, 2009

 Brandeis University
"Vibrational dynamics and heat conduction in amorphous solids."
Vincenzo Vitelli, University of Pennsylvania


Tuesday , February 24, 2009

Brandeis University
"Bacteria as a fluid: Applying the materials physics paradigm to biology"
Aparna Baskaran, Syracuse University


Friday, February 13, 2009

Brandesis University
"Defective ground states of toroidal crystals"
Luca Giomi, Syracuse University


Thursday, February 12, 2009

Brandeis University
"Swimming in viscoelastic fluids and gels"
Henry Fu, Brown University


Thursday, February 5, 2009

Brandeis University
MRSEC Seminar
"Frustrated phenomena in physics and biology:  From supercooled liquids and glasses to protein folding dynamics."
Gregg Lois


Thursday, December 18, 2008

Brandeis University
MRSEC Seminar
"A thermodynamic mechanism for the agglomeration of DNA-looping proteins"
Sumedha Sumedha, Brandeis University


Friday, December 12, 2008

 Brandeis University
MRSEC Seminar
"Senior Design Project: Microfluids Imaging Systems--Concept Design"
Leif Jentoft, Oilin College of Engineering


Thursday, December 11, 2008

Brandeis University
MRSEC  Seminar
"About the Parrondo's Paradox"
Rafael "Phoenix Waterman" Aguade, Brandeis University


Tuesday, December 9, 2008

 Brandeis University
MRSEC Seminar
"Self-assembly of rod-like polyelectrolytes: from materials to cystic fibrosis"
Erik Luijten, University of Illinois


Thursday, December 4, 2008

Brandeis University
MRSEC Seminar
"Examination of Nonliquidlike Behaviors in Molten Polymer Films"
Ophelia K.C. Tsui, Boston University


Monday, November 24, 2008

Brandeis University
MRSEC Seminar
"Modeling, Crowding, and Confinement: Toward a quantitative understanding of cellular environments"
Huan-Xiang Zhou, Florida State University


Friday, November 21, 2008

Brandeis University
MRSEC Seminar/Condensed Matter Theory Seminar
"Active Fluids, Films, and Filaments"
Sriram Ramaswamy, Indian Institute of Science, Bangalore


Thursday, November 20, 2008

Brandeis University
MRSEC Seminar
"Self Assembly of Colloidal Particles of Small Numbers"
Guangnan Meng, Harvard University