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Molecular pumping and separation in a symmetric channel

Published online by Cambridge University Press:  01 February 2011

D. Fleishman ,
A.E. Filippov  and
M. Urbakh
D. Fleishman
Affiliation:
School of Chemistry, Tel Aviv University, 69978 Tel Aviv, Israel.
A.E. Filippov
Affiliation:
Donetsk Institute for Physics and Engineering of NASU, 83144, Donetsk, Ukraine.
M. Urbakh
Affiliation:
School of Chemistry, Tel Aviv University, 69978 Tel Aviv, Israel.
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Abstract

A mechanism responsible for directed transport and molecular separation in a symmetric channel is proposed. We found that under the action of spatial harmonic oscillations of the channel, the system exhibits a directed transport in either direction, presenting multiple current reversals as the amplitude and/or frequency of the oscillations are varied. The particles of different masses may be forced to move with different velocities in the same or in the opposite directions by properly adjusting driving parameters. The directed transport can be produced in both directions even in the absence of thermal noise, the latter can speed up or slow down the transport depending on the system parameters.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 790: Symposium P – Dynamics in Small Confining Systems–2003 , 2003 , P7.1
Copyright
Copyright © Materials Research Society 2004

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