From micro to nano contacts in biological attachment devices
From micro to nano contacts in biological attachment devices
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DOI：
10.1073/pnas.1534701100
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发表时间：
2003-09-16
影响因子：
11.1
通讯作者：
Spolenak, R
中科院分区：
文献类型：
--
作者：
Arzt, E;Gorb, S;Spolenak, R
体重差异很大的动物，如苍蝇、蜘蛛和壁虎，可以附着在垂直的墙壁甚至天花板上，并沿着移动。这种能力是由非常有效的附着机制引起的，其中图案化的表面结构与衬底的轮廓相互作用。一项广泛的显微镜研究表明，在这些连接装置中有很强的反比例效应。而微米尺寸的终端元件的刚毛是足够的苍蝇和甲虫，壁虎必须诉诸亚微米设备，以确保粘附。这种总的趋势是定量解释的接触力学的原理，根据分裂成更精细的子接触的接触增加粘附力。这一原理广泛应用于天然胶粘剂体系的设计，也可应用于实际应用。
Animals with widely varying body weight, such as flies, spiders, and geckos, can adhere to and move along vertical walls and even ceilings. This ability is caused by very efficient attachment mechanisms in which patterned surface structures interact with the profile of the substrate. An extensive microscopic study has shown a strong inverse scaling effect in these attachment devices. Whereas mum dimensions of the terminal elements of the setae are sufficient for flies and beetles, geckos must resort to sub-mum devices to ensure adhesion. This general trend is quantitatively explained by applying the principles of contact mechanics, according to which splitting up the contact into finer subcontacts increases adhesion. This principle is widely spread in design of natural adhesive systems and may also be transferred into practical applications.