  We present a self-contained study of the dynamics of oscillating nanomenisci
anchored on nanometric topographical defects around a cylindrical nanofiber --
radius below 100 nm. Using frequency-modulation atomic force microscopy
(FM-AFM), we show that the friction coefficient surges as the contact angle is
decreased. We propose a theoretical model within the lubrification
approximation that reproduces the experimental data and provides a
comprehensive description of the dynamics of the nanomeniscus. The dissipation
pattern in the vicinity of the contact line and the anchoring properties are
discussed as a function of liquid and surface properties in addition to the
sollicitation conditions.
