Materials 2013, 6(8), 3598-3609; doi:10.3390/ma6083598

Drift in Diffusion Gradients

Department of Physics, University of Camerino, Camerino I-62032, Italy
Received: 27 June 2013; in revised form: 23 July 2013 / Accepted: 13 August 2013 / Published: 19 August 2013
(This article belongs to the Special Issue Diffusion in Micropores and Mesopores 2013)
PDF Full-text Download PDF Full-Text [393 KB, uploaded 19 August 2013 17:02 CEST]
Abstract: The longstanding problem of Brownian transport in a heterogeneous quasi one-dimensional medium with space-dependent self-diffusion coefficient is addressed in the overdamped (zero mass) limit. A satisfactory mesoscopic description is obtained in the Langevin equation formalism by introducing an appropriate drift term, which depends on the system macroscopic observables, namely the diffuser concentration and current. The drift term is related to the microscopic properties of the medium. The paradoxical existence of a finite drift at zero current suggests the possibility of designing a Maxwell demon operating between two equilibrium reservoirs at the same temperature.
Keywords: diffusion; Brownian transport; energy harvesting

Article Statistics

Load and display the download statistics.

Citations to this Article

Cite This Article

MDPI and ACS Style

Marchesoni, F. Drift in Diffusion Gradients. Materials 2013, 6, 3598-3609.

AMA Style

Marchesoni F. Drift in Diffusion Gradients. Materials. 2013; 6(8):3598-3609.

Chicago/Turabian Style

Marchesoni, Fabio. 2013. "Drift in Diffusion Gradients." Materials 6, no. 8: 3598-3609.

Materials EISSN 1996-1944 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert