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	Mechanical and superhydrophobic stabilities of two-scale surfacial structure of lotus leaves
	Yu, Yang ; Zhao, Zhi-Hua ; Zheng, Quan-Shui
	2010-05-07 ; 2010-05-07
关键词	SUPER-HYDROPHOBIC SURFACES ROUGH SURFACES WATER REPELLENCY PLANT-SURFACES TOPOGRAPHY TRANSITION BEHAVIOR LENGTH STATES Chemistry, Physical
中文摘要	To understand why lotus leaf surfaces have a two-scale structure, we explore in this paper two stability mechanisms. One is the stability of the Cassie-Baxter wetting mode that generates the superhydrophobicity. A recent quantitative study (Zheng et al., Langmuir 2005, 21, 12207) showed that the larger the slenderness ratio of the surface structures was, the more stable the Cassie-Baxter wetting mode would be. On the other hand, it is well-known that more slender surface structures can only sustain lower critical water pressures for structure buckling, or Euler instability, while in the natural environments, the water pressure impacting on the lotus surface can reach a fairly high value (10(5) Pa in a heavy rain). Our analysis reveals that the two-scale structure of the lotus leaf surfaces is necessary for keeping both the structure and the superhydrophobicity stable. Furthermore, we find that the water-air interfacial tension makes the slender surface structure more instable and the two-scale structure a necessity.
语种	英语 ; 英语
出版者	AMER CHEMICAL SOC ; WASHINGTON ; 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
内容类型	期刊论文
源URL	[http://hdl.handle.net/123456789/15942]
专题	清华大学
推荐引用方式 GB/T 7714	Yu, Yang,Zhao, Zhi-Hua,Zheng, Quan-Shui. Mechanical and superhydrophobic stabilities of two-scale surfacial structure of lotus leaves[J],2010, 2010.
APA	Yu, Yang,Zhao, Zhi-Hua,&Zheng, Quan-Shui.(2010).Mechanical and superhydrophobic stabilities of two-scale surfacial structure of lotus leaves..
MLA	Yu, Yang,et al."Mechanical and superhydrophobic stabilities of two-scale surfacial structure of lotus leaves".(2010).

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