Abstract
Ion beam irradiation of thin Au and Pt lines on SiO2 substrates, 60–400nm wide and 8–25nm thick, led to the formation of nanowires by directed dewetting. Continued irradiation of these wires further resulted in the formation of a linear array of metal dots with spacings consistent with a Rayleigh instability. For metal lines wider than ≈250nm, dry patches nucleated in the interior of the lines, preventing nanowire formation. The height of the lines relative to the substrate surface could be controlled by anisotropic deformation of the underlying SiO2 substrate.
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