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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); Peng, ZL (reprint author), Chinese Acad Sci, Inst Mech, LNM, Beijing 100190, Peoples R China
Source PublicationPhysical Review E
2011
Volume83Issue:5Pages:51915
ISSN1539-3755
AbstractInspired 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.
KeywordEmbedded-atom Potentials Elastic Solids Dispersion Forces 130 Nm Gecko Friction Contact Attachment Detachment Substrate
Subject AreaPhysics
DOI10.1103/PhysRevE.83.051915
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Indexed BySCI ; EI
Language英语
WOS IDWOS:000290722200015
WOS KeywordEMBEDDED-ATOM POTENTIALS ; ELASTIC SOLIDS ; DISPERSION FORCES ; 130 NM ; GECKO ; FRICTION ; CONTACT ; ATTACHMENT ; DETACHMENT ; SUBSTRATE
WOS Research AreaPhysics
WOS SubjectPhysics, Fluids & Plasmas ; Physics, Mathematical
Funding OrganizationThe 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.
DepartmentLNM仿生材料与固体的微尺度力学
Classification一类
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Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/44928
Collection非线性力学国家重点实验室
Corresponding AuthorPeng, ZL (reprint author), Chinese Acad Sci, Inst Mech, LNM, Beijing 100190, Peoples R China
Recommended Citation
GB/T 7714
Peng ZL,Chen SH,Peng, ZL . 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,&Peng, ZL .(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.
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