Search for tag: "matter"
Ordered and disordered motion in dense active materials - Ludovic BerthierWe discuss how the non-equilibrium driving forces introduced by the natural biological activity or by physical self-propulsion mechanisms generically affect the structure, dynamics and phase…
From Katie Gentilello
53 plays
0
|
|
Local and global avalanches in sheared granular materials - Aghil Abed ZadehWe perform a stick-slip experiment to characterize avalanches for granular materials. In our experiment, a constant speed stage pulls a slider which rests on a vertical bed of circular photoelastic…
From Katie Gentilello
55 plays
0
|
|
Exploiting disorder - Sid NagelWe are taught to understand solids by considering ideal crystals. This approach becomes untenable as the amount of disorder increases; for a glass with no well-defined long-range order, a crystal is…
From Katie Gentilello
14 plays
0
|
|
The Topological Character of Smectics - Randy KamienThough the systematic use of topology to understand defects in ordered matter is now nearly 50 years old, the original work failed to completely characterize systems with broken translational order,…
From Katie Gentilello
32 plays
0
|
|
Symmetry Breaking during the Synthesis of Nanoparticles - Younan XiaSymmetry breaking is a ubiquitous phenomenon that occurs spontaneously when a system is subjected to variations in size and/or perturbations in terms of thermodynamic parameters. As a stochastic…
From Katie Gentilello
68 plays
0
|
|
Fracturing of marginally stable structures: fiber networks and topological metamaterials - Xiaoming MaoWhen conventional brittle materials break, long cracks form due to stress focusing at crack tips: a phenomenon explained by Griffith in the 1920s. In this talk, we will discuss two types of systems…
From Katie Gentilello
29 plays
0
|
|
Mechanics of Active Networks – Lessons from Fire Ant Aggregations - Shankar Lalitha SridharBiological assemblies in nature are seen as active matter due to their ability to perform intelligent collective motion based on neighbor interactions and sometimes without any centralized control…
From Katie Gentilello
32 plays
0
|
|
"Cellular packing, mechanical stress and the evolution of multicellularity - Shane JacobeenThe evolution of multicellularity set the stage for sustained increases in organismal complexity. However, a fundamental aspect of this transition remains largely unknown: how do simple clusters of…
From Katie Gentilello
9 plays
0
|
|
Cell contraction induces long-ranged stress stiffening in the extracellular matrix - Pierre RoncerayAnimal cells in tissues are supported by biopolymer matrices, which exhibit highly nonlinear mechanical properties. Here we show that this nonlinearity allows living contractile cells to generate a…
From Katie Gentilello
12 plays
0
|
|
Some universal features of soft random solids - Paul GoldbartThe aim of this talk is to look at soft random solids through the lens of condensed matter theory, and to explore how their core features -- most notably their random structure and elasticity…
From Katie Gentilello
15 plays
0
|
|
Quantifying hidden order out of equilibrium - Paul ChaikinWhile the equilibrium properties, states, and phase transitions of interacting systems are well described by statistical mechanics, the lack of suitable state parameters has hindered the…
From Katie Gentilello
40 plays
0
|
|
Self–assembled DNA liquids: Properties and protein activation - Omar SalehBiomolecules can self-assemble into liquid phases, termed ‘membraneless organelles’ in the biological context, though also known as ‘coacervates’. I will discuss our efforts…
From Katie Gentilello
26 plays
0
|
|
Topology in Polar Flocking and Active Nematics - Mark BowickActive flocking on curved surfaces, such as the 2-sphere and the catenoid, exhibits dynamical symmetry breaking in the form of spontaneous flow, calculable inhomogeneous density patterns and…
From Katie Gentilello
29 plays
0
|
|
Highly efficient oil-water separation using surface-programmable membranes - Minxiang ZengThe challenge of separating emulsified oil from oil/water mixture has sparked enormous research interests in developing advanced membrane technology. One of the most crucial elements to achieve high…
From Katie Gentilello
41 plays
0
|
|
Why is Structural Hierarchy So Prevalent in Biological Materials? - Jonathan MichelStructural hierarchy, in which materials possess distinct features on multiple length scales, is ubiquitous in nature. Many biological materials, such as bone, cellulose, and muscle, have as many as…
From Katie Gentilello
53 plays
0
|
|
Geometric underpinnings of auxetic behavior - Ileana StreinuIn materials science, auxetic behavior is characterized by negative Poisson's ratios. We have recently developed a purely geometric theory of auxetic behavior for periodic framework materials.…
From Katie Gentilello
38 plays
0
|