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Issue 20, 2021
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Dynamical time scales of friction dynamics in active microrheology of a model glass

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Abstract

Owing to the local/heterogeneous structures in supercooled liquids, after several decades of research, it is now clear that supercooled liquids are structurally different from their conventional liquid counterparts. Accordingly, an approach based on a local probe should provide a better understanding about the local mechanical properties as well as heterogeneous structures. Recently, the superiority of active microrheology over global rheology has been demonstrated [Yu et al., Sci. Adv., 2020, 6, 8766]. Here, we elaborate this new avenue of research and provide more evidence for such superiority. We report on the results of an extensive molecular dynamics simulation of active microrheology of a model glass. We identify several time scales in time series of friction, and detect a transition in dynamical behavior of friction. We discuss the possible relation to structural heterogeneities—a subject of considerable interest in glass physics.

Graphical abstract: Dynamical time scales of friction dynamics in active microrheology of a model glass

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Article information


Submitted
16 Nov 2020
Accepted
19 Mar 2021
First published
22 Mar 2021

Soft Matter, 2021,17, 5162-5169
Article type
Paper

Dynamical time scales of friction dynamics in active microrheology of a model glass

A. Madanchi, J. W. Yu, W. B. Lee, M. R. Rahimi Tabar and S. H. E. Rahbari, Soft Matter, 2021, 17, 5162 DOI: 10.1039/D0SM02039G

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