Abstract
We report observation of narrow nanowires and high density nanodots on the Si(001) surfaces when they are exposed to a single application of interferential irradiation of laser pulses of 7 ns. These nanostructures form selectively depending on interference parameters so that their placements can be controlled by controlling the parameters. The morphologies of the nanostructures are studied by atomic force microscopy. The nanowire width increases with interference period. The narrowest nanowires observed have the width smaller than 26 nm, which is eight times smaller than the interference period while the nanodots have a very large density of 1.8 ± 0.45) × 1011/cm2.
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