Effects of surface roughness and film thickness on the adhesion of a bioinspired nanofilm

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	Effects of surface roughness and film thickness on the adhesion of a bioinspired nanofilm
	Peng ZL(彭志龙); Chen SH(陈少华)
刊名	Physical Review E
	2011
通讯作者邮箱	chenshaohua72@hotmail.com
卷号	83 期号:5 页码:51915
关键词	Embedded-Atom Potentials Elastic Solids Dispersion Forces 130 Nm Gecko Friction Contact Attachment Detachment Substrate
ISSN号	1539-3755
通讯作者	Peng, ZL (reprint author), Chinese Acad Sci, Inst Mech, LNM, Beijing 100190, Peoples R China
产权排序	[Peng, ZL; Chen, SH] Chinese Acad Sci, Inst Mech, LNM, Beijing 100190, Peoples R China
中文摘要	Inspired by the gecko's climbing ability, adhesion between an elastic nanofilm with finite length and a rough substrate with sinusoidal roughness is studied in the present paper, considering the effects of substrate roughness and film thickness. It demonstrates that the normal adhesion force of the nanofilm on a rough substrate depends significantly on the geometrical parameters of the substrate. When the film length is larger than the wavelength of the sinusoidal roughness of the substrate, the normal adhesion force decreases with increasing surface roughness, while the normal adhesion force initially decreases then increases if the wavelength of roughness is larger than the film length. This finding is qualitatively consistent with a previously interesting experimental observation in which the adhesion force of the gecko spatula is found to reduce significantly at an intermediate roughness. Furthermore, it is inferred that the gecko may achieve an optimal spatula thickness not only to follow rough surfaces, but also to saturate the adhesion force. The results in this paper may be helpful for understanding how geckos overcome the influence of natural surface roughness and possess such adhesion to support their weights.
学科主题	Physics
分类号	一类
类目[WOS]	Physics, Fluids & Plasmas ; Physics, Mathematical
研究领域[WOS]	Physics
关键词[WOS]	EMBEDDED-ATOM POTENTIALS ; ELASTIC SOLIDS ; DISPERSION FORCES ; 130 NM ; GECKO ; FRICTION ; CONTACT ; ATTACHMENT ; DETACHMENT ; SUBSTRATE
收录类别	SCI ; EI
资助信息	The work reported here is supported by the NSFC through Grants No. 10972220, No. 10732050, and No. 11021262. In addition, the authors thank the two anonymous reviewers for their helpful and professional suggestions.
原文出处	http://dx.doi.org/10.1103/PhysRevE.83.051915
语种	英语
WOS记录号	WOS:000290722200015
公开日期	2012-04-01
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/44928]
专题	力学研究所_非线性力学国家重点实验室
推荐引用方式 GB/T 7714	Peng ZL,Chen SH. Effects of surface roughness and film thickness on the adhesion of a bioinspired nanofilm[J]. Physical Review E,2011,83(5):51915.
APA	彭志龙,&陈少华.(2011).Effects of surface roughness and film thickness on the adhesion of a bioinspired nanofilm.Physical Review E,83(5),51915.
MLA	彭志龙,et al."Effects of surface roughness and film thickness on the adhesion of a bioinspired nanofilm".Physical Review E 83.5(2011):51915.