Various bio-inspired dry adhesive materials have been investigated. In this work, lithography and silicon deep etching method were used to fabricate bio-inspired micro-pillar dry adhesive materials of which the parameters, such as side length, Height to Side length Aspect Ratio (HSAR), and inter-pillar Distance to Side length Aspect Ratio (DSAR) were comprehensively studied to obtain a dry adhesive with high adhesion. An orthogonal array method was designed and a series of fabrication experiments were conducted to identify optimum parameters, which resulted in a high normal adhesion of 2.98 N·cm^‒2 and a shear adhesion of 9.59 N·cm^‒2. An adhesion and desorption device was further designed on basis of the optimum dry adhesive, which enables an Unmanned Aerial Vehicle (UAV) to successfully adhere on and detach from a ceiling. This would allow an UAV to stay aloft for prolonged time, which could be invaluable to many applications, such as energy conservation and aerial detection.

中文翻译：

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优化的仿生微柱干胶及其在无人飞行器上附着和脱离天花板的应用

已经研究了多种生物启发的干粘合剂材料。在这项工作中，使用光刻和硅深蚀刻方法来制造生物启发的微柱干胶材料，其参数包括边长，边长与边长的长宽比（HSAR）和柱间到边的距离等参数对长度长宽比（DSAR）进行了全面研究，以获得具有高附着力的干式粘合剂。设计了正交阵列方法，并进行了一系列制造实验以确定最佳参数，从而获得2.98 N·cm ^‒2的高法向粘合力和9.59 N·cm ^‒2的剪切粘合力。在最佳干胶的基础上进一步设计了一种附着力和解吸装置，这使得无人飞行器（UAV）能够成功附着在天花板上并从天花板上脱离。这将使无人机能够长时间停留在高空，这对于许多应用（例如节能和空中探测）可能是无价的。