TY - JOUR
T1 - Electrokinetically driven flow control using bare electrodes
AU - Wu, Chien Hsien
AU - Chen, Jia Kun
AU - Yang, Ruey Jen
N1 - Funding Information:
Acknowledgments The authors gratefully acknowledge the financial support provided to this study by the National Science Council of Taiwan under Grant No. NSC-94-2212-E-006-097 and by the National Nano Device Laboratories of Taiwan under Grant No. NDL-94S-C-022. The authors would also like to thank Mr. S.-B. Huang and Drs. G.-B. Lee and L.-M. Fu for their invaluable assistance throughout the course of this study.
PY - 2007/8
Y1 - 2007/8
N2 - This paper presents a novel technique for manipulating fluid flows within microchannels using bare electrodes. The electrodes, with a width of 100 μm, are fabricated using conventional photolithography techniques by etching the bulk flow channel into a glass substrate and then depositing Pt/Cr thin films within this channel. The application of an external voltage to these electrodes produces localized variations in the electrical potential distribution, which in turn induce changes in the velocity and direction of the flow within the microchannel. The effectiveness of the proposed control technique is investigated numerically using computational fluid dynamics simulations and experimentally using a fabricated microchip containing multiple bare electrode-pairs. The results demonstrate that the application of appropriate driving voltages to the bare electrode-pairs enables the microdevice to function as a nozzle, a diffuser, a mixer or a valveless valve.
AB - This paper presents a novel technique for manipulating fluid flows within microchannels using bare electrodes. The electrodes, with a width of 100 μm, are fabricated using conventional photolithography techniques by etching the bulk flow channel into a glass substrate and then depositing Pt/Cr thin films within this channel. The application of an external voltage to these electrodes produces localized variations in the electrical potential distribution, which in turn induce changes in the velocity and direction of the flow within the microchannel. The effectiveness of the proposed control technique is investigated numerically using computational fluid dynamics simulations and experimentally using a fabricated microchip containing multiple bare electrode-pairs. The results demonstrate that the application of appropriate driving voltages to the bare electrode-pairs enables the microdevice to function as a nozzle, a diffuser, a mixer or a valveless valve.
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U2 - 10.1007/s10404-006-0146-z
DO - 10.1007/s10404-006-0146-z
M3 - Article
AN - SCOPUS:34347376803
SN - 1613-4982
VL - 3
SP - 485
EP - 494
JO - Microfluidics and Nanofluidics
JF - Microfluidics and Nanofluidics
IS - 4
ER -