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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.
Source PublicationCOLLOIDS AND SURFACES B-BIOINTERFACES
2014-10-01
Volume122Pages:662-668
ISSN0927-7765
AbstractRecent 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.
KeywordGecko Adhesion Surface Wettability Nano-bubble Capillary Force
Subject AreaBiophysics ; Chemistry ; Materials Science
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Indexed BySCI ; EI
Language英语
WOS IDWOS:000343612900083
Funding OrganizationThe 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.
DepartmentLNM仿生材料与固体的微尺度力学
Classification二类/Q1
Citation statistics
Cited Times:10[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/49313
Collection非线性力学国家重点实验室
Corresponding AuthorChen, SH (reprint author), Chinese Acad Sci, Inst Mech, LNM, Beijing 100190, Peoples R China.
Recommended Citation
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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