The kinetics of photoinduced surface deposition (PSD) of metallic silv
er have been studied through observation of growth of the photodeposit
ed Ag particles. The amount of metallic Ag segregated by PSD increases
in proportion to exposure time at the early stage and subsequently to
the square root of exposure time. The kinetics can be explained by th
e change in the rate-determining step from the photoelectronic process
to diffusion process of Ag+ ions in glass.