Particle separation by external fields on periodic surfaces

doi:10.1088/0953-8984/17/49/010

Particle separation by external fields on periodic surfaces

J M Sancho et al 2005 J. Phys.: Condens. Matter 17 S4151-S4163 doi: 10.1088/0953-8984/17/49/010

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J M Sancho^1,4, M Khoury¹, K Lindenberg² and A M Lacasta³
¹ Departament d'Estructura i Constituents de la Matèria, Facultat de Física, Universitat de Barcelona, Diagonal 647, E-08028 Barcelona, Spain
² Department of Chemistry and Biochemistry 0340, and Institute for Nonlinear Science, University of California, San Diego, La Jolla, CA 92093-0340, USA
³ Departament de Física Aplicada, Universitat Politècnica de Catalunya, Avinguda Doctor Marañon 44, E-08028 Barcelona, Spain
⁴ Author to whom any correspondence should be addressed
E-mail: jmsancho@ecm.ub.es

Abstract. Particles moving on perfect periodic surfaces under the influence of external forces may move along directions that deviate from that of the force. We briefly recall previous results for transport of particles on surfaces with periodic traps or periodic obstacles driven by a constant external force, and present new results for particles moving in a harmonic periodic potential. The sorting properties are explored as a function of a number of control parameters, specifically the friction, force amplitude and direction, temperature, and lattice constants.

Print publication: Issue 49 (14 December 2005)
Received 19 July 2005, in final form 28 September 2005
Published 25 November 2005

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Particle separation by external fields on periodic surfaces

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