Autonomously Probing Viscoelasticity in Disordered Suspensions.
Phys Rev Lett
; 125(25): 258002, 2020 Dec 18.
Article
em En
| MEDLINE
| ID: mdl-33416358
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.
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01-internacional
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MEDLINE
Idioma:
En
Ano de publicação:
2020
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Article