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	Tuning wettability and getting superhydrophobic surface by controlling surface roughness with well-designed microstructures
	Zhu, Liang ; Feng, Yanying ; Ye, Xiongying ; Zhou, Zhaoying
	2010-05-10 ; 2010-05-10
会议名称	SENSORS AND ACTUATORS A-PHYSICAL ; 13th International Conference on Solid-State Sensors, Actuators and Microsystems ; Seoul, SOUTH KOREA ; Web of Science
关键词	superhydrophobic surface roughness wettability micromaching FILMS Engineering, Electrical & Electronic Instruments & Instrumentation
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 x 9.45 mu m x 16 mu m (width x width x 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. (c) 2005 Elsevier B.V. All rights reserved.
会议录出版者	ELSEVIER SCIENCE SA ; LAUSANNE ; PO BOX 564, 1001 LAUSANNE, SWITZERLAND
语种	英语 ; 英语
内容类型	会议论文
源URL	[http://hdl.handle.net/123456789/19354]
专题	清华大学
推荐引用方式 GB/T 7714	Zhu, Liang,Feng, Yanying,Ye, Xiongying,et al. Tuning wettability and getting superhydrophobic surface by controlling surface roughness with well-designed microstructures[C]. 见:SENSORS AND ACTUATORS A-PHYSICAL, 13th International Conference on Solid-State Sensors, Actuators and Microsystems, Seoul, SOUTH KOREA, Web of Science.

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