期刊
JOURNAL OF ADHESION SCIENCE AND TECHNOLOGY
卷 25, 期 6-7, 页码 627-642出版社
TAYLOR & FRANCIS LTD
DOI: 10.1163/016942410X525849
关键词
Directional; mobility; adhesion; superhydrophobic; paper; plasma; etching; lab-on-paper; 2D microfluidics
资金
- Institute for Paper Science and Technology (IPST) at Georgia
Directional mobility and controlled adhesion of water drops were obtained on superhydrophobic paper surfaces by generating high surface energy ink patterns using commercial desktop printing. By changing the curvature/shapes of the ink patterns, geometrical constraints were imposed on the movement of the three-phase liquid/solid/vapor contact line. With proper design of pattern shapes, the critical sliding angle of water drops was manipulated with respect to different directions. Adhesion tunability of water drops on superhydrophobic paper was established by design of chemical heterogeneity. Printing of 'checker' ink patterns with appropriate area fraction and feature dimensions allowed variation in the critical sliding angle of water drops. The manipulation of directional mobility and adhesion of water drops on superhydrophobic paper surfaces allows the design of novel components such as 2D flow paths, gates/diodes, junctions and drop size filters for emerging 2D paper-based microfluidics technology for biomedical diagnostic applications. (C) Koninklijke Brill NV, Leiden, 2011
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