  Nucleation of a new phase almost always starts at a surface. This surface is
almost always assumed not to change with time. However, surfaces can roughen,
partially dissolve and change chemically with time. Each of these irreversible
changes will change the nucleation rate at the surface, resulting in a
time-dependent nucleation rate. Here we use a simple model to show that partial
surface dissolution can qualitatively change the nucleation process, in a way
that is testable in experiment. The changing surface means that the nucleation
rate is increasing with time. There is an initial period during which no
nucleation occurs, followed by relatively rapid nucleation.
