We investigate ex situ the kinetics of a thin, thermally evaporated gold layer on glass below and at the percolation thickness. Using grazing incidence ultra-small-angle X-ray scattering (GIUSAXS), we follow the domain formation during annealing well below the bulk melting point of gold. We observe a strong dewetting of the gold layer for thicknesses near the critical percolatin thickness. We compare our findings with optical spectroscopy, which corroborates the GIUSAXS data
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