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Design of shrinkage microvalve in microchannel with hydrophilic and hydrophobic walls

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Abstract

This paper presents a simple design of shrinkage microvalves which can be used to effectively stopping capillary flow inside a microchannel with hydrophilic and hydrophobic walls. Based on the relationship between capillary pressure and cross-section geometry of a microchannel, the microvalve is designed with a critical ratio of rectangular section. In order to verify the feasibility of the design rule, a couple of shrinkage microvalves with different aspect ratios of cross-section are fabricated by using PDMS bonded with glass wafer. The experiment demonstrates the stopping effect of the proposed design of shrinkage microvalve.

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Acknowledgments

This work is supported by the National High Technology Research and Development Programme (863 Program) of China (2007AA042102); China National Science fund (No. 50975272).

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Authors and Affiliations

  1. State Key Laboratory of Applied Optics, Changchun Institute of Optics, Fine Mechanics and Physics (CIOMP), Chinese Academy of Sciences, Changchun, 130033, China

    Ping Zhang, Yongbo Deng, Yongshun Liu & Yihui Wu

  2. Suzhou Institute of Biomedical Engineering and Technology, Chinese Academy of Sciences, Suzhou, 215163, China

    Ping Zhang, Yongshun Liu & Yihui Wu

  3. Graduate University of Chinese Academy of Sciences, Beijing, China

    Yongbo Deng & Yongshun Liu

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  1. Ping Zhang
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  2. Yongbo Deng
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  3. Yongshun Liu
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  4. Yihui Wu
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Correspondence to Ping Zhang or Yihui Wu.

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Zhang, P., Deng, Y., Liu, Y. et al. Design of shrinkage microvalve in microchannel with hydrophilic and hydrophobic walls. Microsyst Technol 17, 1491–1495 (2011). https://doi.org/10.1007/s00542-011-1339-2

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  • DOI: https://doi.org/10.1007/s00542-011-1339-2

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