Issue 10, 2009

A travelling wave dielectrophoretic pump for blood delivery

Abstract

The travelling wave dielectrophoretic pump studied here is essentially a rectangular straight micro-channel with an electrode array on part of its wall, and operated under an ac voltage with phase shift at neighbouring electrodes. The travelling wave dielectrophoretic force drives the cells, which drag the plasma, and after some sophisticated interaction between conventional dielectrophoresis, travelling wave dielectrophoresis and fluid mechanics, the whole blood is delivered. The pump was fabricated using MEMS techniques and studied in details for different parameters. It is found that the pumping velocity is maximized at an intermediate frequency around 20–30 MHz (varies with phase shift), and at an intermediate channel height at about 40 µm. The quasi-static average cell velocity can reach 15 µm s−1 for a pump with 1 mm length and 16 electrodes (total array length 465 µm) operated at 5 V and 20 MHz with 90° phase shift.

Graphical abstract: A travelling wave dielectrophoretic pump for blood delivery

Supplementary files

Article information

Article type
Paper
Submitted
19 Dec 2008
Accepted
12 Mar 2009
First published
30 Mar 2009

Lab Chip, 2009,9, 1349-1356

A travelling wave dielectrophoretic pump for blood delivery

U. Lei, C.W. Huang, J. Chen, C.Y. Yang, Y.J. Lo, A. Wo, C.F. Chen and T.W. Fung, Lab Chip, 2009, 9, 1349 DOI: 10.1039/B822809D

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