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Micromachines 2016, 7(9), 165;

Development of a Multi-Stage Electroosmotic Flow Pump Using Liquid Metal Electrodes

Key Laboratory of Cryogenics, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, 29 Zhongguancun East Road, Haidian District, Beijing 100190, China
This paper is an extended version of our paper presented in the 2016 International Conference of Microfluidics, Nanofluidics and Lab-on-a-Chip, Dalian, China, 10–12 June 2016.
Author to whom correspondence should be addressed.
Academic Editors: Yongxin Song, Junsheng Wang and Dongqing Li
Received: 27 July 2016 / Revised: 28 August 2016 / Accepted: 7 September 2016 / Published: 14 September 2016
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Injection of liquid metal into a polydimethylsiloxane (PDMS) channel can provide a simple, cheap, and fast method to fabricate a noncontact electrode for micro electroosmotic flow (EOF) pumps. In this study, a multi-stage EOF pump using liquid metal noncontact electrodes was proposed and demonstrated for high-flow-velocity applications. To test the pumping performance of this EOF pump and measure the flow velocity, fluorescent particles were added into deionized (DI) water to trace the flow. According to the experimental results, the pump with a five-stage design can drive a water flow of 5.57 μm/s at 10 V, while the PDMS gap between the electrode and the pumping channel is 20 μm. To provide the guidance for the pump design, parametric studies were performed and fully discussed, such as the PDMS gap, pumping channel dimension, and stage number. This multi-stage EOF pump shows potential for many high-flow-velocity microfluidic applications. View Full-Text
Keywords: electroosmotic flow pump; liquid metal electrodes; microfluidics electroosmotic flow pump; liquid metal electrodes; microfluidics

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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Gao, M.; Gui, L. Development of a Multi-Stage Electroosmotic Flow Pump Using Liquid Metal Electrodes. Micromachines 2016, 7, 165.

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