Dynamic stiffness of the contact between a carbon nanotube and a flat substrate in a peeling geometry

Abstract : We study the physics of adhesion and the contact mechanics at the nanoscale with a peeling experiment of a carbon nanotube on a flat substrate. Using an interferometric atomic force microscope and an extended force modulation protocol, we investigate the frequency response of the stiffness of the nano-contact from DC to 20 kHz. We show that this dynamic stiffness is only weakly frequency dependent, increasing by a factor 2 when the frequency grows by 3 orders of magnitude. Such behavior may be the signature of amorphous relaxations during the mechanical solicitation at the nano-scale.
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Submitted on : Thursday, March 9, 2017 - 11:04:55 PM
Last modification on : Thursday, April 19, 2018 - 2:54:04 PM
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Tianjun Li, Lorène Champougny, Ludovic Bellon. Dynamic stiffness of the contact between a carbon nanotube and a flat substrate in a peeling geometry. Journal of Applied Physics, American Institute of Physics, 2017, 121, pp.094305 ⟨10.1063/1.4977867⟩. ⟨ensl-01399263v2⟩

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