Paper Title:
Electrokinetic Instability Flow in Nanofilm-Coated Microfluidic Channels
  Abstract

This paper presented a parametric experimental study of electrokinetic instability phenomena in a cross-shaped configuration microfluidic device with varying channel depths and conductivity ratios. The flow instability is observed when applied electric field strength exceeds a certain critical value. The critical electric field strength is examined as a function of the conductivity ratio of two samples liquid, microchannel depth, and the treatment of microchannel wetted surface. It is found that the critical electric field strengths for the onset of electrokinetic instability are strongly dependent on the conductivity ratio of two samples liquid, and decrease as the channel depths increasing of microfluidic devices. In the present study, the surface inside microchannels is treated utilizing hydrophilic and hydrophobic organic-based SOG (spin-on-glass) nanofilms for glass-based microchips. The experimental results indicate that no significant difference for the critical electric fields for the onset of electrokinetic instability phenomena in both hydrophilic and hydrophobic SOG coating in the surface of microchannels. The critical electric fields for the onset of electrokinetic instability phenomena are slightly lower in both SOG coated cases in compare with that of the non-coated microchannel.

  Info
Periodical
Advanced Materials Research (Volumes 60-61)
Edited by
Xiaohao Wang
Pages
330-333
DOI
10.4028/www.scientific.net/AMR.60-61.330
Citation
W. C. Chen, T. F. Hong, W. B. Luo, C. H. Tai, C. H. Tsai, L. M. Fu, "Electrokinetic Instability Flow in Nanofilm-Coated Microfluidic Channels ", Advanced Materials Research, Vols. 60-61, pp. 330-333, 2009
Online since
January 2009
Export
Price
$32.00
Share

In order to see related information, you need to Login.

In order to see related information, you need to Login.

Authors: Tijjani Adam, U. Hashim, T.S. Dhahi
Abstract:At a macro scale level, mixing is generally achieved by a turbulent flow, which makes possible of segregating the fluid in small domains,...
345
Authors: Jin Xian Wang, Zeng Wen, Song Jing Li
Chapter 4: Advanced Control Research and Application
Abstract:A pneumatic microvalve which can be used in pneumatic pressure control for lab-on-a-chip applications is presented in this paper. In order to...
244