Effects of surface wettability on gecko adhesion underwater

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	Effects of surface wettability on gecko adhesion underwater
	Peng ZL(彭志龙); Wang C(王琮); Chen SH(陈少华); Chen, SH (reprint author), Chinese Acad Sci, Inst Mech, LNM, Beijing 100190, Peoples R China.
发表期刊	COLLOIDS AND SURFACES B-BIOINTERFACES
	2014-10-01
卷号	122 页码:662-668
ISSN	0927-7765
摘要	Recent experiments have shown that gecko adhesion underwater depends significantly on surface wettability. Theoretical models of a gecko seta adhering on different substrates are firstly established in order to disclose such an adhesion mechanism. The results show that the capillary force induced by nano-bubbles between gecko seta and the substrate is the mainly influencing factor. The capillary force exhibits an attractive feature between gecko setae and hydrophobic surfaces underwater. However, it is extremely weak or even repulsive on hydrophilic surfaces underwater. A self-similarly splitting model is further considered to simulate multiple gecko setae on substrates underwater. It is interesting to find that the total capillary force depends significantly on the number of nano-bubble bridges and wettability of substrates. The total force is attractive and increases monotonically with the increase of the splitting number on hydrophobic substrates underwater. However, it decreases drastically or even becomes repulsive on hydrophilic substrates underwater. The present result can not only give a reasonable explanation on the existing experimental observations but also be helpful for the design of novel biomimetic adhesives. (C) 2014 Elsevier B.V. All rights reserved.
关键词	Gecko Adhesion Surface Wettability Nano-bubble Capillary Force
学科领域	Biophysics ; Chemistry ; Materials Science
URL	查看原文
收录类别	SCI ; EI
语种	英语
WOS记录号	WOS:000343612900083
项目资助者	The work reported here is supported by NSFC through Grants #11302228, #11125211, #11372317 and the 973 Nano-project (2012CB937500). In addition, the authors give their thanks to the two anonymous reviewers for their helpful and professional suggestions.
课题组名称	LNM仿生材料与固体的微尺度力学
论文分区	二类/Q1
引用统计	被引频次：18[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://dspace.imech.ac.cn/handle/311007/49313
专题	非线性力学国家重点实验室
通讯作者	Chen, SH (reprint author), Chinese Acad Sci, Inst Mech, LNM, Beijing 100190, Peoples R China.
推荐引用方式 GB/T 7714	Peng ZL,Wang C,Chen SH,et al. Effects of surface wettability on gecko adhesion underwater[J]. COLLOIDS AND SURFACES B-BIOINTERFACES,2014,122:662-668.
APA	Peng ZL,Wang C,Chen SH,&Chen, SH .(2014).Effects of surface wettability on gecko adhesion underwater.COLLOIDS AND SURFACES B-BIOINTERFACES,122,662-668.
MLA	Peng ZL,et al."Effects of surface wettability on gecko adhesion underwater".COLLOIDS AND SURFACES B-BIOINTERFACES 122(2014):662-668.

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