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Title: Frictional active Brownian particles
Authors: Nie, Pin
Chattoraj, Joyjit
Piscitelli, Antonio
Doyle, Patrick
Ni, Ran
Ciamarra, Massimo Pica
Keywords: Science::Physics
Issue Date: 2020
Source: Nie, P., Chattoraj, J., Piscitelli, A., Doyle, P., Ni, R., & Ciamarra, M. P. (2020). Frictional active Brownian particles. Physical Review E, 102(3), 032612-. doi:10.1103/physreve.102.032612
Project: MOE2017-T2-1-066
Journal: Physical Review E 
Abstract: Frictional forces affect the rheology of hard-sphere colloids, at high shear rate. Here we demonstrate, via numerical simulations, that they also affect the dynamics of active Brownian particles and their motility-induced phase separation. Frictional forces increase the angular diffusivity of the particles, in the dilute phase, and prevent colliding particles from resolving their collision by sliding one past to the other. This leads to qualitatively changes of motility-induced phase diagram in the volume-fraction motility plane. While frictionless systems become unstable towards phase separation as the motility increases only if their volume fraction overcomes a threshold, frictional systems become unstable regardless of their volume fraction. These results suggest the possibility of controlling the motility-induced phase diagram by tuning the roughness of the particles.
ISSN: 2470-0045
DOI: 10.1103/PhysRevE.102.032612
Rights: © 2020 American Physical Society (APS). All rights reserved. This paper was published in Physical Review E and is made available with permission of American Physical Society (APS).
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:SPMS Journal Articles

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