  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.
