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Title: Ratcheting of driven attracting colloidal particles: temporal density oscillations and current multiplicity
Authors: Pototsky, Andrey
Archer, Andrew J.
Savel'ev, Sergey
Thiele, Uwe
Marchesoni, Fabio
Issue Date: 2011
Publisher: © American Physical Society
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.
Abstract: We 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.
Description: This article was published in the journal, Physical Review E [© American Physical Society].
Version: Published
DOI: 10.1103/PhysRevE.83.061401
URI: https://dspace.lboro.ac.uk/2134/12682
Publisher Link: http://dx.doi.org/10.1103/PhysRevE.83.061401
ISSN: 1539-3755
Appears in Collections:Published Articles (Maths)

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