Electroosmotic pumping using porous anodic alumina membranes

Yu Feng Chen*, Ming Chia Li, Wen Jeng Chang, Chi-Chuan Wang, C. P. Chen

*Corresponding author for this work

研究成果: Conference contribution同行評審

摘要

This study demonstrated electroosmotic pumping with high flow rate per unit area at a rather low applied voltage through an alumina nano-porous membrane driven by Platinum mesh electrodes. The electrode was placed perpendicular to, and had direct contact with nano-channel inlet to reduce the electric voltage drop in the reservoir. The complete set of the Poisson-Nernst-Planck equations for electrical potential and ionic concentration, coupled with the Navier-Stokes equation were solved for the purpose of a full understanding of the ionic transport and flow characteristics of EOF in nano-fluidics capillaries. The measured flowrate versus electrolyte (KCI) concentration reveals that the flowrate is usually high in low concentration (10-5 M∼10 -7 M) regime in which a maximum value also occurs. In addition, a remarkable surge of flow rate is observed when the concentration surpasses below 10-4 M. The maximum flowrate achieved from this study is 0.09 mL min-2V-1 cm-2 and the energy transfer efficiency is 0.43% at an operation voltage of 20V. The flowrates investigated in this study are comparable to other existing results whereas the corresponding operation voltage used this study is about one to two order lower than most existing results. Numerical results exhibit correct trends for nano flows involving strong overlap of electrical double layers. Comparisons of numerical and experimental results were made and discussed.

原文English
主出版物標題2008 Proceedings of the ASME Micro/Nanoscale Heat Transfer International Conference, MNHT 2008
頁面139-146
頁數8
DOIs
出版狀態Published - 20 八月 2008
事件1st ASME Micro/Nanoscale Heat Transfer International Conference, MNHT08 - Tainan, Taiwan
持續時間: 6 一月 20089 一月 2008

出版系列

名字2008 Proceedings of the ASME Micro/Nanoscale Heat Transfer International Conference, MNHT 2008
PART A

Conference

Conference1st ASME Micro/Nanoscale Heat Transfer International Conference, MNHT08
國家Taiwan
城市Tainan
期間6/01/089/01/08

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