Bulletin of the American Physical Society
APS March Meeting 2022
Volume 67, Number 3
Monday–Friday, March 14–18, 2022; Chicago
Session Q26: Microscale Non-Newtonian and Complex Flows I
3:00 PM–6:00 PM,
Wednesday, March 16, 2022
Room: McCormick Place W-187B
Sponsoring
Units:
DSOFT DPOLY GSNP
Chair: Ivan Christov, Purdue University
Abstract: Q26.00005 : Local deformation fields in active soft matter induced by internal stresses*
4:12 PM–4:24 PM
Presenter:
Mehdi Molaei
(University of Chicago)
Authors:
Mehdi Molaei
(University of Chicago)
Steven A Redford
(University of Chicago)
Wen-hung Chou
(University of Chicago)
Danielle Scheff
(University of Chicago)
Margaret Gardel
(University of Chicago)
We first start by showing how active stresses propagate in a 2d liquid crystal formed by short actin filaments. We then show how deformation fields in disordered actin networks change with network viscoelasticity. Finally, we measure the local strain fields of stress fibers in single cells, which are induced by myosin mini-filaments and F-actin retrograde flow. The convoluted feedback loops in the cells can be better understood by performing these measurements while perturbing multiple controlling pathways of the actomyosin cytoskeleton, including those that alter the active stresses and the viscoelasticity of the network.
*Mrsec at Univetsity of Chicago
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