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	Hierarchical capillary adhesion of microcantilevers or hairs
	Jian-Lin Liu ; Xi-Qiao Feng ; Re Xia ; Hong-Ping Zhao
	2010-10-12 ; 2010-10-12
关键词	Theoretical or Mathematical/ adhesion beams (structures) cantilevers capillarity contact angle elastic moduli micromechanical devices wetting/ capillary adhesion microcantilevers capillary forces animal hairs carbon nanotubes carbon nanowires randomly distributed array hierarchical structures wetting contact angle elastic modulus potential energy minimization microbeams/ A6810G Fluid interface activity, spreading A6810C Fluid surface energy (surface tension, interface tension, angle of contact, etc.) A6810E Fluid interface elasticity, viscosity, and viscoelasticity A0710C Micromechanical and nanomechanical devices and systems B2575D Design and modelling of MEMS and NEMS devices
中文摘要	As a result of capillary forces, animal hairs, carbon nanotubes or nanowires of a periodically or randomly distributed array often assemble into hierarchical structures. In this paper, the energy method is adopted to analyse the capillary adhesion of microsized hairs, which are modelled as clamped microcantilevers wetted by liquids. The critical conditions for capillary adhesion of two hairs, three hairs or two bundles of hairs are derived in terms of Young's contact angle, elastic modulus and geometric sizes of the beams. Then, the hierarchical capillary adhesion of hairs is addressed. It is found that for multiple hairs or microcantilevers, the system tends to take a hierarchical structure as a result of the minimization of the total potential energy of the system. The level number of structural hierarchy increases with the increase in the number of hairs if they are sufficiently long. Additionally, we performed experiments to verify our theoretical solutions for the adhesion of microbeams.
语种	英语
出版者	IOP Publishing Ltd. ; UK
内容类型	期刊论文
源URL	[http://hdl.handle.net/123456789/79081]
专题	清华大学
推荐引用方式 GB/T 7714	Jian-Lin Liu,Xi-Qiao Feng,Re Xia,et al. Hierarchical capillary adhesion of microcantilevers or hairs[J],2010, 2010.
APA	Jian-Lin Liu,Xi-Qiao Feng,Re Xia,&Hong-Ping Zhao.(2010).Hierarchical capillary adhesion of microcantilevers or hairs..
MLA	Jian-Lin Liu,et al."Hierarchical capillary adhesion of microcantilevers or hairs".(2010).

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