Frequency dependent AC electroosmotic flow in nanochannels

Author

van den Beld, Wesley T. E. ; Sparreboom, W. ; van den Berg, A. ; Eijkel, Jan C. T.

Author_Institution

BIOS Lab.-on-a-Chip Group, Twente Univ., Enschede, Netherlands

fYear

2014

fDate

26-30 Jan. 2014

Firstpage

1067

Lastpage

1070

Abstract

We report frequency-dependent bidirectional AC electroosmotic flow (AC-EOF) in a nanochannel with double layer overlap. This work follows our report in μTas 2008 of unidirectional AC-EOF in nanochannels [1]. Observed is a bidirectional pumping behavior; simulations of the low frequency pumping confirm a direction opposite to that of AC-EOF in microchannels. By this frequency-dependent bidirectional pumping, nanochannel AC-EOF behaves in fundamentally different way than microchannel AC-EOF. Generally, the results are of importance for the understanding of ion and liquid transport in nanoconfinement.

Keywords

electrohydrodynamics; electrophoresis; flow simulation; microchannel flow; nanofluidics; osmosis; double layer overlap; frequency-dependent bidirectional AC electroosmotic flow; frequency-dependent bidirectional pumping; ion transport; liquid transport; low frequency pumping confirm simulation; microchannel AC-EOF; nanochannel AC-EOF; nanoconfinement; unidirectional AC-EOF; Arrays; Electrodes; Frequency measurement; Geometry; Ions; Liquids; Microchannel;

fLanguage

English

Publisher

ieee

Conference_Titel

Micro Electro Mechanical Systems (MEMS), 2014 IEEE 27th International Conference on

Conference_Location

San Francisco, CA

Type

conf

DOI

10.1109/MEMSYS.2014.6765829

Filename

6765829