Computations in Science Seminars
Apr 2024
17
Wed 12:15
Peter Bolhuis, University of Amsterdam
Host: Aaron Dinner ()
Organizer: Martin Falk ()
Activating self-assembled patchy particle architectures

Patchy particles have become a standard model in soft matter physics to investigate complex molecular behavior, from proteins to large colloidal systems. Synthetic colloidal particles with specific directional interactions can act as a playground to deeper understand their molecular counterparts (such as proteins and smaller molecules), but also open up avenues in the design of novel materials, and even mimic active, living matter. A particularly sensitive way of experimentally controlling the attraction between the patches is by critical Casimir interactions, which allows colloids to assemble into various superstructures, such as chains and networks. To understand and explore the behavior of these Casimir systems, we developed a quantitatively accurate potential model. Using these optimized potentials in large-scale simulations we can predict the phase behavior of mixtures of patchy particles, understand the relaxation behavior of colloidal molecules, and explain the experimentally observed anomalous excess of monomers. Next, we take the system out of equilibrium by including self-propelled active particles, causing rings and chains in the network to undergo breakage and rearrangement. Experiments and simulation show that even a low activity already induces dramatic changes into the dynamical behaviour of these colloidal networks. Such activated viscoelastic architectures can possibly act as model for understanding the behavior of living matter.

Apr 2024
24
Wed 12:15
Luís A. N. Amaral, Northwestern Univeristy
Host: Arvind Murugan ()
Organizer: Carlos Floyd ()
May 2024
1
Wed 12:15
Gautam Reddy, Princeton University
Host: Arvind Murugan ()
Organizer: Daniel Seara ()
May 2024
8
Wed 12:15
S. Furkan Ozturk, Harvard University
Host: Arvind Murugan ()
Organizer: Carlos Floyd ()
May 2024
15
Wed 12:15
Stanislav Y. Shvartsman, Princeton University
Host: Neil Shubin ()
Organizer: Martin Falk ()
May 2024
22
Wed 12:15
OPEN
May 2024
29
Wed 12:15
OPEN