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

Madanchi, A ; Sharif University of Technology | 2021

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  1. Type of Document: Article
  2. DOI: 10.1039/d0sm02039g
  3. Publisher: Royal Society of Chemistry , 2021
  4. Abstract:
  5. 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. This journal is © The Royal Society of Chemistry
  6. Keywords:
  7. Cryogenic liquids ; Glass ; Molecular dynamics ; Supercooling ; Dynamical behaviors ; Friction dynamics ; Heterogeneous structures ; Local mechanical properties ; Microrheology ; Molecular dynamics simulations ; Structural heterogeneity ; Supercooled liquids ; Friction
  8. Source: Soft Matter ; Volume 17, Issue 20 , 2021 , Pages 5162-5169 ; 1744683X (ISSN)
  9. URL: https://pubs.rsc.org/en/content/articlelanding/2021/sm/d0sm02039g