We study the nonequilibrium dynamics of colloidal system with short-range depletion attraction and screened electrostatic repulsion on a disordered substrate. We find a growth-melting process of the clusters as the temperature is increased. By strengthening the screened electrostatic repulsion, a depinning transition from moving cluster to plastic flow is observed, which is characterized by a peak in threshold depinning force. The corresponding phase diagram is then mapped out. Due to the influences of disorder from substrate, the clusters are polarized by the strong external force, accompanied by the appearance of interesting orientational order parallel to the force and translational order perpendicular to the force. Under the condition of strong external force, the influences of density of pins and temperature are also studied.
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7 September 2011
Research Article|
September 01 2011
Dynamical phase of driven colloidal systems with short-range attraction and long-range repulsion
Jiang-Xing Chen;
Jiang-Xing Chen
a)
1Department of Physics,
Hangzhou Dianzi University
, Hangzhou 310018, China
3Chemical Physics Theory Group, Department of Chemistry,
University of Toronto
, Toronto, Ontario M5S 3H6, Canada
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Jun-Wen Mao;
Jun-Wen Mao
2Department of Physics,
HuZhou Teachers College
, HuZhou 313000, China
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Snigdha Thakur;
Snigdha Thakur
3Chemical Physics Theory Group, Department of Chemistry,
University of Toronto
, Toronto, Ontario M5S 3H6, Canada
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Jiang-Rong Xu;
Jiang-Rong Xu
1Department of Physics,
Hangzhou Dianzi University
, Hangzhou 310018, China
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Fu-yang Liu
Fu-yang Liu
1Department of Physics,
Hangzhou Dianzi University
, Hangzhou 310018, China
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Jiang-Xing Chen
1,3,a)
Jun-Wen Mao
2
Snigdha Thakur
3
Jiang-Rong Xu
1
Fu-yang Liu
1
1Department of Physics,
Hangzhou Dianzi University
, Hangzhou 310018, China
3Chemical Physics Theory Group, Department of Chemistry,
University of Toronto
, Toronto, Ontario M5S 3H6, Canada
2Department of Physics,
HuZhou Teachers College
, HuZhou 313000, China
a)
Electronic mail: [email protected].
J. Chem. Phys. 135, 094504 (2011)
Article history
Received:
February 11 2011
Accepted:
August 02 2011
Citation
Jiang-Xing Chen, Jun-Wen Mao, Snigdha Thakur, Jiang-Rong Xu, Fu-yang Liu; Dynamical phase of driven colloidal systems with short-range attraction and long-range repulsion. J. Chem. Phys. 7 September 2011; 135 (9): 094504. https://doi.org/10.1063/1.3629850
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