TY  - JOUR
AU  - Qi, Kai
AU  - Westphal, Elmar
AU  - Gompper, Gerhard
AU  - Winkler, Roland G.
TI  - Enhanced Rotational Motion of Spherical Squirmer in Polymer Solutions
JO  - Physical review letters
VL  - 124
IS  - 6
SN  - 1079-7114
CY  - College Park, Md.
PB  - APS
M1  - FZJ-2020-01363
SP  - 068001
PY  - 2020
AB  - The rotational diffusive motion of a self-propelled, attractive spherical colloid immersed in a solution of self-avoiding polymers is studied by mesoscale hydrodynamic simulations. A drastic enhancement of the rotational diffusion by more than an order of magnitude in the presence of activity is obtained. The amplification is a consequence of two effects, a decrease of the amount of adsorbed polymers by active motion and an asymmetric encounter with polymers on the squirmer surface, which yields an additional torque and random noise for the rotational motion. Our simulations suggest a way to control the rotational dynamics of squirmer-type microswimmers by the degree of polymer adsorption and system heterogeneity.
LB  - PUB:(DE-HGF)16
C6  - pmid:32109107
UR  - <Go to ISI:>//WOS:000513240600010
DO  - DOI:10.1103/PhysRevLett.124.068001
UR  - https://juser.fz-juelich.de/record/874315
ER  -