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Why a Lotus-like Superhydrophobic Surface Is Self-Cleaning? An Explanation from Surface Force Measurements and Analysis  
Why a Lotus-like Superhydrophobic Surface Is Self-Cleaning? An Explanation from Surface Force Measurements and Analysis
資料類型: PDF文件
關鍵詞: Superhydrophobic  Surface  Lotus  effect  force  
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簡介:
The unique self-cleaning feature of lotus-like superhydrophobic (SH) surface attracted world-wide interests in recent years. However, the mechanism of the self-cleaning phenomena remains unclear. Here, we attempt to provide a comprehensive understanding of why self-cleaning of the particles with a broad range of size can be realized on the lotus-like SH surfaces. After measurements and analysis of the force involved at the interface, we conclude that there are four main preconditions for self-cleaning: 1) CA > 90°; 2) Low enough sliding angle; 3) Low enough adhesion force; and 4) Proper particle size. However, as far as the lotus-like SH surface and typical dust are concerned, all the preconditions will be satisfied automatically. We also observe that, the particles with a broad range of size (from submicron level to the millimeter level) and density (virtually no limit) can be driven by water droplet on the lotus-like SH surface. This interesting finding may be helpful for the design of novel engineering system at the micron-millimeter scale in the future.
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上傳時間: 2015-04-02 9:48:56
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