Volume 29, Issue 5 p. 994-1005
Microfluidics and Miniaturization

Effect of Joule heating on electrokinetic transport

Barbaros Cetin

Barbaros Cetin

Department of Mechanical Engineering, Vanderbilt University, Nashville, TN, USA

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Dongqing Li Dr.

Corresponding Author

Dongqing Li Dr.

Department of Mechanical Engineering, Vanderbilt University, Nashville, TN, USA

Department of Mechanical Engineering, Vanderbilt University, VU Station B 351592, Nashville, TN 37235, USA Fax: +1-615-343-6687===Search for more papers by this author
First published: 27 February 2008
Citations: 91

Abstract

The Joule heating (JH) is a ubiquitous phenomenon in electrokinetic flow due to the presence of electrical potential gradient and electrical current. JH may become pronounced for applications with high electrical potential gradients or with high ionic concentration buffer solutions. In this review, an in-depth look at the effect of JH on electrokinetic processes is provided. Theoretical modeling of EOF and electrophoresis (EP) with the presence of JH is presented and the important findings from the previous studies are examined. A numerical study of a fused-silica capillary PCR reactor powered by JH is also presented to extend the discussion of favorable usage of JH.