Electrokinetic instability flow in nanofilm-coated microfluidic channels

Wei Chih Chen, Ting Fu Hong, Wen Bo Luo, Chang Hsien Tai, Chien Hsiung Tsai, Lung Ming Fu

研究成果: Conference contribution

摘要

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.

原文English
主出版物標題Micro and Nano Technology - 1st International Conference Society of Micro/Nano Technology, CSMNT
發行者Trans Tech Publications
頁面330-333
頁數4
ISBN(列印)0878493395, 9780878493395
DOIs
出版狀態Published - 2009
事件Micro and Nano Technology - 1st International Conference Society of Micro/Nano Technology, CSMNT - Beijing, China
持續時間: 2008 十一月 192008 十一月 22

出版系列

名字Advanced Materials Research
60-61
ISSN(列印)1022-6680

Other

OtherMicro and Nano Technology - 1st International Conference Society of Micro/Nano Technology, CSMNT
國家/地區China
城市Beijing
期間08-11-1908-11-22

All Science Journal Classification (ASJC) codes

  • 工程 (全部)

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