Directional Wetting in Anisotropic Inverse Opals | Zendy

Katherine R. Phillips | Zendy; Nicolas Vogel | Zendy; Ian B. Burgess | Zendy; Carole C. Perry | Zendy; Joanna Aizenberg | Zendy

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Directional Wetting in Anisotropic Inverse Opals

Author(s) -

Katherine R. Phillips,

Nicolas Vogel,

Ian B. Burgess,

Carole C. Perry,

Joanna Aizenberg

Publication year - 2014

Publication title -

langmuir

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.042

H-Index - 333

eISSN - 1520-5827

pISSN - 0743-7463

DOI - 10.1021/la5015253

Subject(s) - wetting , anisotropy , microscale chemistry , isotropy , materials science , porous medium , inverse , percolation (cognitive psychology) , porosity , composite material , optics , geometry , physics , mathematics education , mathematics , neuroscience , biology

Porous materials display interesting transport phenomena due to restricted motion of fluids within the nano- to microscale voids. Here, we investigate how liquid wetting in highly ordered inverse opals is affected by anisotropy in pore geometry. We compare samples with different degrees of pore asphericity and find different wetting patterns depending on the pore shape. Highly anisotropic structures are infiltrated more easily than their isotropic counterparts. Further, the wetting of anisotropic inverse opals is directional, with liquids filling from the side more easily. This effect is supported by percolation simulations as well as direct observations of wetting using time-resolved optical microscopy.

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