Resolving the nanoscale adhesion of individual gecko spatulae by atomic force microscopy
Resolving the nanoscale adhesion of individual gecko spatulae by atomic force microscopy
复制标题
DOI：
10.1098/rsbl.2004.0254
复制
发表时间：
2005-03-01
期刊：
影响因子：
3.3
通讯作者：
Arzt, E
中科院分区：
文献类型：
--
作者：
Huber, G;Gorb, SN;Arzt, E
能够贴着墙壁和在天花板上行走的动物将这种能力归功于微米和纳米级的附着元素。壁虎的附着力最高，它们已经形成了复杂的层次结构，包括脚趾（毫米尺寸）、薄片（400-600 μ m尺寸）、刚毛（微米尺寸）和抹刀（类似于200 nm尺寸）。附着力：不同基板上的刚毛的力先前已经通过微机电系统技术测量。在这里，我们报告的第一个成功的实验中，力-位移曲线确定为个别抹刀原子力显微镜。壁虎附着系统的这些最小元件的附着力可重复地发现为约10 nN。这种方法揭示了附着的纳米机制，并将有助于人工附着系统的合理设计。
Animals that cling to walls and walk on ceilings owe this ability to micrometre and nanoscale attachment elements. The highest adhesion forces are encountered in geckoes, which have developed intricate hierarchical structures consisting of toes (millimetre dimensions), lamella (400-600 mu m size), setae (micrometre dimensions) and spatulae (similar to 200 nm size). Adhesion: forces of setae on different substrates have previously been measured by a micro-electromechanical system technique. Here we report the first successful experiments in which the force-displacement curves were determined for individual spatulae by atomic force microscopy. The adhesion force for these smallest elements of the gecko's attachment system is reproducibly found to be about 10 nN. This method sheds new light on the nanomechanisms of attachment and will help in the rational design of artificial attachment systems.