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A process to fabricate three-dimensional crystalline structures at controlled locations on a substrate during film growth and annealing is demonstrated. Low-energy electron microscopy reveals that silver is transported to regions on a tungsten surface with closely spaced atomic steps. By controlling the substrate topography using a focused ion beam to machine small holes, this general mechanism produces an array of cylinders as a silver film dewets the substrate.
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Kevin F. McCarty (2006) studied this question.
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