Directional imbibition on a chemically patterned silicon micropillar array
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A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
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Authors
Date
2016
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Mcode
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Language
en
Pages
7
1100-1106
1100-1106
Series
Soft Matter, Volume 12, issue 4
Abstract
Directional imbibition of oils (hexadecane, tetradecane, and dodecane) and water is demonstrated on a chemically patterned silicon micropillar array. Four different directional imbibition types are shown: unidirectional, two types of bidirectional and tridirectional imbibition. The surfaces consist of a silicon micropillar array with an overlaid surface chemistry pattern. This configuration leads to anisotropic wetting behaviour into various directions of the advancing meniscus. Due to the free energy landscape obtained, the advancing meniscus gets pinned in some directions (determined by the surface chemistry pattern) while it is free to move to the remaining directions. The conditions for directional imbibition and design criteria for the surfaces are derived and discussed.Description
Keywords
WETTING PROPERTIES, SURFACES
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Citation
Jokinen, V 2016, ' Directional imbibition on a chemically patterned silicon micropillar array ', Soft Matter, vol. 12, no. 4, pp. 1100-1106 . https://doi.org/10.1039/c5sm01746g