Microchannels: In Situ Realization of Asymmetric Ratchet Structures within Microchannels by Directionally Guided Light Transmission and Their Directional Flow Behavior (Adv. Mater. 17/2014)

Authors

  • Won-Gyu Bae,

    1. School of Mechanical & Aerospace Engineering, Seoul National University, Seoul, Republic of Korea
    2. Interdisciplinary Program of Bioengineering, Seoul National University, Seoul, Republic of Korea
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  • Sang Moon Kim,

    1. School of Mechanical & Aerospace Engineering, Seoul National University, Seoul, Republic of Korea
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  • Se-Jin Choi,

    1. MCNet Co., Ltd., Dangjeong-dong, Gunpo-si, Gyeonggi-do, Korea
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  • Sang Geun Oh,

    1. School of Mechanical & Aerospace Engineering, Seoul National University, Seoul, Republic of Korea
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  • Hyunsik Yoon,

    Corresponding author
    1. Department of Chemical & Biomolecular Engineering, Seoul National University of Science & Technology, Seoul, Republic of Korea
    • Hyunsik Yoon, School of Mechanical & Aerospace Engineering===, Seoul National University===, Seoul=== 151-742=== Republic of Korea=== ===

      Kookheon Char, Interdisciplinary Program of Bioengineering===, Seoul National University===, Seoul=== 151-742=== Republic of Korea=== ===

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  • Kookheon Char,

    Corresponding author
    1. The National Initiative Creative Research Center for Intelligent Hybrids & the World Class, University Program for Chemical Convergence for Energy & Environment, School of Chemical & Biological Engineering, Seoul National University, Seoul, Republic of Korea
    • Hyunsik Yoon, School of Mechanical & Aerospace Engineering===, Seoul National University===, Seoul=== 151-742=== Republic of Korea=== ===

      Kookheon Char, Interdisciplinary Program of Bioengineering===, Seoul National University===, Seoul=== 151-742=== Republic of Korea=== ===

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  • Kahp Y. Suh

    1. School of Mechanical & Aerospace Engineering, Seoul National University, Seoul, Republic of Korea
    2. Interdisciplinary Program of Bioengineering, Seoul National University, Seoul, Republic of Korea
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Abstract

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On page 2665, K. Char, H. Yoon, and co-workers present a direct and facile method to realize programmed asymmetric structures within microchannels. A photo-polymerization with the directional transmission through an optically asymmetric film is exploited to fabricate asymmetric ratchets. Two examples to control the fluid speed, as well as the rate-dependent channel filling, showing different dwell times in a split channel, are demonstrated.

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