| 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.
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| Source Publication | COLLOIDS AND SURFACES B-BIOINTERFACES
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| 2014-10-01 | |
| Volume | 122Pages:662-668 |
| ISSN | 0927-7765 |
| Abstract | 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. |
| Keyword | Gecko Adhesion Surface Wettability Nano-bubble Capillary Force |
| Subject Area | Biophysics ; Chemistry ; Materials Science |
| URL | 查看原文 |
| Indexed By | SCI ; EI |
| Language | 英语 |
| WOS ID | WOS:000343612900083 |
| Funding Organization | 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. |
| Department | LNM仿生材料与固体的微尺度力学 |
| Classification | 二类/Q1 |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://dspace.imech.ac.cn/handle/311007/49313 |
| Collection | 非线性力学国家重点实验室 |
| Corresponding Author | Chen, 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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| IMCAS-J2014-283.pdf（2147KB） | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | View Download | |
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