Viscoelastic features of adhesive setae of the tokay gecko (Gekko gecko L.)


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Deformations of particular setae of adhesive toe pad of the tokay gecko were investigated by atomic-force microscopy. The effective elastic modulus of the investigated setae varying within 0.34–19 GPa, a pronounced hysteresis was observed during reversible bending of setae. The hysteresis-related energy losses may be as high as 98% of the total bending work. The pronounced viscous features of the setae contradict the hypothesis of dynamic self-cleaning of the gecko adhesive cover, according to which the setae are considered as absolutely elastic cantilever beams.

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Yu. Ivlev

Severtsov Institute of Ecology and Evolution

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Email: yuvertb@sevin.ru
俄罗斯联邦, Moscow, 119071

A. Il’in

Institute of Technology of Microelectronics and Specially Pure Materials

Email: yuvertb@sevin.ru
俄罗斯联邦, Chernogolovka, Moscow oblast

O. Trofimov

Institute of Technology of Microelectronics and Specially Pure Materials

Email: yuvertb@sevin.ru
俄罗斯联邦, Chernogolovka, Moscow oblast

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