Effects of surface wettability on gecko adhesion underwater

CORC > 力学研究所 > 中国科学院力学研究所 > 非线性力学国家重点实验室

	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.
刊名	COLLOIDS AND SURFACES B-BIOINTERFACES
	2014-10-01
卷号	122 页码:662-668
关键词	Gecko Adhesion Surface Wettability Nano-bubble Capillary Force
ISSN号	0927-7765
产权排序	[Peng, Z. L.; Wang, C.; Chen, S. H.] Chinese Acad Sci, Inst Mech, LNM, Beijing 100190, Peoples R China
英文摘要	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.
学科主题	Biophysics ; Chemistry ; Materials Science
分类号	二类/Q1
URL标识	查看原文
语种	英语
WOS记录号	WOS:000343612900083
资助机构	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.
公开日期	2014-11-27
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/49314]
专题	力学研究所_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.