Tuning wettability and getting superhydrophobic surface by controlling surface roughness with well-designed microstructures | |
Yanying Feng ; Liang Zhu ; Xiongying Ye ; Zhaoying Zhou | |
2010-05-10 ; 2010-05-10 | |
关键词 | Practical Experimental/ contact angle drops microfluidics micromachining monolayers self-assembly surface roughness wetting/ wettability property superhydrophobic surface surface roughness solid surface square micropillar silicon micromachining self-assembled monolayer contact angle 26.34 micron 9.45 micron 16 micron/ A0710C Micromechanical devices and systems A6820 Solid surface structure A6810C Fluid surface energy (surface tension, interface tension, angle of contact, etc.) A8116D Self-assembly in nanofabrication A6817 Monolayers and Langmuir-Blodgett films B2575D Design and modelling of micromechanical devices B2575F Fabrication of micromechanical devices/ distance 2.634E-05 m size 9.45E-06 m size 1.6E-05 m |
中文摘要 | We proposed a method to tune the wettability of a solid surface by changing its roughness. With specific designed micro square pillar arrays, the apparent contact angle of a hydrophobic surface can be continuously adjusted from the intrinsic contact angle. The samples were fabricated by combining silicon micromachining and self-assembled monolayer modification. The experimental results were closer to Cassie's theoretical predictions on the superhydrophobic surfaces than that by Wenzel's. The apparent contact angle (CA) can be tuned from the intrinsic CA to a superhydrophobic CA. The largest apparent CA in our experiments can be up to 162 degrees , with pillars of 9.45 mu m*9.45 mu m*16 mu m (width*width*height), and the spacing of 26.34 mu m. By controlling the size and layout of the square micropillars, we also formed a surface with a certain roughness gradient, on which spontaneous movement of a droplet has been observed. [All rights reserved Elsevier]. |
语种 | 英语 ; 英语 |
出版者 | Elsevier ; Switzerland |
内容类型 | 期刊论文 |
源URL | [http://hdl.handle.net/123456789/24983] ![]() |
专题 | 清华大学 |
推荐引用方式 GB/T 7714 | Yanying Feng,Liang Zhu,Xiongying Ye,et al. Tuning wettability and getting superhydrophobic surface by controlling surface roughness with well-designed microstructures[J],2010, 2010. |
APA | Yanying Feng,Liang Zhu,Xiongying Ye,&Zhaoying Zhou.(2010).Tuning wettability and getting superhydrophobic surface by controlling surface roughness with well-designed microstructures.. |
MLA | Yanying Feng,et al."Tuning wettability and getting superhydrophobic surface by controlling surface roughness with well-designed microstructures".(2010). |
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