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    The modified Cassie’s equation and contact angle hysteresis

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    Type
    Article
    Authors
    Xu, Xianmin
    Wang, Xiaoping
    KAUST Grant Number
    SA-C0040/UK-C0016
    Date
    2012-08-29
    Online Publication Date
    2012-08-29
    Print Publication Date
    2013-02
    Permanent link to this record
    http://hdl.handle.net/10754/599938
    
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    Abstract
    In this paper, we derive a modified Cassie's equation for wetting on chemically patterned surfaces from a homogenization approach. The derivation reveals that effective contact angle is a local average of the static contact angle along the contact line which describes all possible equilibrium states including the local minimum of the free energy of the system. The usual Cassie's state which corresponds to the global minimum is only a special case. We then discuss the contact angle hysteresis on chemically patterned surfaces. © 2012 Springer-Verlag.
    Citation
    Xu X, Wang X (2012) The modified Cassie’s equation and contact angle hysteresis. Colloid and Polymer Science 291: 299–306. Available: http://dx.doi.org/10.1007/s00396-012-2748-1.
    Sponsors
    This publication was based on work supported in part by Award No SA-C0040/UK-C0016, made by King Abdullah University of Science and Technology (KAUST), Hong Kong RGC-CERG grants 603107 and 604209, Chinese NSFC project 11001260, and by National Center for Mathematics and Interdisciplinary Sciences, CAS.
    Publisher
    Springer Nature
    Journal
    Colloid and Polymer Science
    DOI
    10.1007/s00396-012-2748-1
    ae974a485f413a2113503eed53cd6c53
    10.1007/s00396-012-2748-1
    Scopus Count
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    Publications Acknowledging KAUST Support

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