TY  - JOUR
AU  - Wagner, Martin
AU  - Roca, Sergi
AU  - Ripoll, Marisol
TI  - Collective behavior of thermophoretic dimeric active colloids in three-dimensional bulk
JO  - The European physical journal / E
VL  - 44
IS  - 3
SN  - 1292-895X
CY  - Heidelberg
PB  - Springer
M1  - FZJ-2021-01777
SP  - 43
PY  - 2021
AB  - Colloids driven by phoresis constitute one of the main avenues for the design of synthetic microswimmers. For these swimmers, the specific form of the phoretic and hydrodynamic interactions dramatically influences their dynamics. Explicit solvent simulations allow the investigation of the different behaviors of dimeric Janus active colloids. The phoretic character is modified from thermophilic to thermophobic, and this, together with the relative size of the beads, strongly influences the resulting solvent velocity fields. Hydrodynamic flows can change from puller-type to pusher-type, although the actual flows significantly differ from these standard flows. Such hydrodynamic interactions combined with phoretic interactions between dimers result in several interesting phenomena in three-dimensional bulk conditions. Thermophilic dimeric swimmers are attracted to each other and form large and stable aggregates. Repulsive phoretic interactions among thermophobic dimeric swimmers hinder such clustering and lead, together with long- and short-ranged attractive hydrodynamic interactions, to short-lived, aligned swarming structures.
LB  - PUB:(DE-HGF)16
C6  - 33772651
UR  - <Go to ISI:>//WOS:000634829900001
DO  - DOI:10.1140/epje/s10189-021-00043-8
UR  - https://juser.fz-juelich.de/record/891857
ER  -