Ratcheting of driven attracting colloidal particles.pdf (794.55 kB)
Ratcheting of driven attracting colloidal particles: temporal density oscillations and current multiplicity
journal contribution
posted on 2013-07-03, 14:32 authored by Andrey Pototsky, Andrew J. Archer, Sergey Savel'ev, Uwe Thiele, Fabio MarchesoniWe consider the unidirectional particle transport in a suspension of colloidal particles which interact with each
other via a pair potential having a hard-core repulsion plus an attractive tail. The colloids are confined within a
long narrow channel and are driven along by a dc or an ac external potential. In addition, the walls of the channel
interact with the particles via a ratchetlike periodic potential. We use dynamical density functional theory to
compute the average particle current. In the case of dc drive, we show that as the attraction strength between the
colloids is increased beyond a critical value, the stationary density distribution of the particles loses its stability
leading to depinning and a time-dependent density profile. Attraction induced symmetry breaking gives rise to the
coexistence of stable stationary density profiles with different spatial periods and time-periodic density profiles,
each characterized by different values for the particle current.
History
School
- Science
Department
- Mathematical Sciences
Citation
POTOTSKY, A. ... et al., 2011. Ratcheting of driven attracting colloidal particles: temporal density oscillations and current multiplicity. Physical Review E, 83 (6), 061401, 14 pp.Publisher
© American Physical SocietyVersion
- VoR (Version of Record)
Publication date
2011Notes
This article was published in the journal, Physical Review E [© American Physical Society].ISSN
1539-3755Publisher version
Language
- en