Jump to main content
Jump to site search

Issue 36, 2020
Previous Article Next Article

Translational and rotational dynamics of a self-propelled Janus probe in crowded environments

Author affiliations

Abstract

We computationally investigate the dynamics of a self-propelled Janus probe in crowded environments. The crowding is caused by the presence of viscoelastic polymers or non-viscoelastic disconnected monomers. Our simulations show that the translational as well as rotational mean square displacements have a distinctive three-step growth for fixed values of self-propulsion force, and steadily increase with self-propulsion, irrespective of the nature of the crowder. On the other hand, in the absence of crowders, the rotational dynamics of the Janus probe is independent of self-propulsion force. On replacing the repulsive polymers with sticky ones, translational and rotational mean square displacements of the Janus probe show a sharp drop. Since different faces of a Janus particle interact differently with the environment, we show that the direction of self-propulsion also affects its dynamics. The ratio of long-time translational and rotational diffusivities of the self-propelled probe with a fixed self-propulsion, when plotted against the area fraction of the crowders, passes through a minimum and at higher area fraction merges to its value in the absence of the crowder. This points towards the decoupling of the translational and rotational dynamics of the self-propelled probe at an intermediate area fraction of the crowders. However, such translational–rotational decoupling is absent for passive probes.

Graphical abstract: Translational and rotational dynamics of a self-propelled Janus probe in crowded environments

Back to tab navigation

Supplementary files

Article information


Submitted
26 Feb 2020
Accepted
05 Aug 2020
First published
05 Aug 2020

Soft Matter, 2020,16, 8482-8491
Article type
Paper

Translational and rotational dynamics of a self-propelled Janus probe in crowded environments

L. Theeyancheri, S. Chaki, N. Samanta, R. Goswami, R. Chelakkot and R. Chakrabarti, Soft Matter, 2020, 16, 8482
DOI: 10.1039/D0SM00339E

Social activity

Search articles by author

Spotlight

Advertisements