Autonomously Probing Viscoelasticity in Disordered Suspensions
Soft Condensed Matter
2020-12-22 v1
Abstract
Recent experiments show a strong rotational-diffusion enhancement for self-propelled microrheological probes in colloidal glasses. Here, we provide microscopic understanding using simulations with a frictional probe-medium coupling that converts active translation into rotation. Diffusive enhancement emerges from the medium's disordered structure and peaks at a second-order transition in the number of contacts. Our results reproduce the salient features of the colloidal glass experiment and support an effective description that is applicable to a broader class of viscoelastic suspensions.
Cite
@article{arxiv.2012.10654,
title = {Autonomously Probing Viscoelasticity in Disordered Suspensions},
author = {Clara Abaurrea-Velasco and Celia Lozano and Clemens Bechinger and Joost de Graaf},
journal= {arXiv preprint arXiv:2012.10654},
year = {2020}
}
Comments
5 pages, 4 figures