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    Superhydrophobic Cylindrical Nanoshell Array
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    Department of Electrical Engineering, KAIST, Daejeon 305-701, Republic of Korea
    *To whom correspondence should be addressed. E-mail: [email protected]. Telephone: +82-42-350-3477. Fax: +82-42-350-8565.
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    Langmuir

    Cite this: Langmuir 2010, 26, 11, 7661–7664
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    https://doi.org/10.1021/la100911s
    Published May 4, 2010
    Copyright © 2010 American Chemical Society
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    Abstract

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    A superhydrophobic property was demonstrated on a cylindrical poly crystalline silicon nanoshell array due to its geometrical properties, even without a hydrophobic coating. The proposed structure showed superior water-repellency compared to a conventional pillar structure with an identical structural dimension. This superhydrophobic property is attributed to an air pillar that exists in the nanoshell. Through the calculation of capillary pressure, the stability of the air pillar was confirmed. Furthermore, a droplet impinging test was conducted on the fabricated cylindrical nanoshell array to verify the robust Cassie state of the proposed structure under a dynamic condition.

    Copyright © 2010 American Chemical Society

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    Supporting Information

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    Measured CA and CAH values of a cylindrical nanoshell array with sidewall thicknesses of 30 and 400 nm are provided to observe the relationship between CAH and the nanoshell thickness. A SEM image for cylindrical nanoshell array with each of the thickness is provided as well. Also, the detailed calculation of Gibbs free energy for the Cassie state and Wenzel state is provided to predict the CA value. This material is available free of charge via the Internet at http://pubs.acs.org.

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    Cited By

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    Langmuir

    Cite this: Langmuir 2010, 26, 11, 7661–7664
    Click to copy citationCitation copied!
    https://doi.org/10.1021/la100911s
    Published May 4, 2010
    Copyright © 2010 American Chemical Society
    Request reuse permissions

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