  Molecular dynamics simulations have been performed to study frictional slip
and its influence on energy dissipation and momentum transfer at atomically
smooth solid/water interfaces. By modifying surface chemistry, we investigate
the relationship between slip and the mechanical response of a vibrating solid
for both hydrophilic and hydrophobic surfaces. We discover physical phenomena
that emerge at high frequencies and that have significant contributions to
energy dissipation. A new analytical model is developed to describe mechanical
response of the resonators in this high frequency regime, which is relevant in
such applications as MEMS-based biosensors. We find a linear relationship
between the slip length and the ratio of the damping rate shift to resonant
frequency shift, which provides a new way to obtain information about slip
length from experiments.
