  We have studied the liquid-like response of the surface of vapour-deposited
glassy films of polystyrene to the introduction of gold nanoparticles on the
surface. The build-up of polymer material was measured as a function of time
and temperature for both as-deposited films, as well as films that have been
rejuvenated to become normal glasses cooled from the equilibrium liquid. The
temporal evolution of the surface profile is well described by the
characteristic power law of capillary-driven surface flows. In all cases, the
surface evolution of the as-deposited films and the rejuvenated films are
enhanced compared to bulk and are not easily distinguishable from each other.
The temperature dependence of the measured relaxation times determined from the
surface evolution is found to be quantitatively comparable to similar studies
for high molecular weight spincast polystyrene. Comparisons to numerical
solutions of the glassy thin film equation provide quantitative estimates of
the surface mobility. For temperatures sufficiently close to the
glass-transition temperature, particle embedding is also measured and used as a
probe of bulk dynamics, and in particular bulk viscosity.
