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Variable resolution fluctuation electron microscopy can reveal the characteristic decay length over which nanoscale order persists in amorphous materials. In the fluctuation method, four-atom positional correlations within the resolution (coherent diameter) of the electron beam dominate the experimental data. Such correlations occur when the sample contains topologically ordered regions within a random...
Superlattice structures resulting from vacancy ordering have been observed in many materials. Here we report vacancy ordering behavior in III2VI3 nanowires. The formation of layer-like structural vacancies has been achieved during the synthesis of In2Se3 nanowires through a vapor-transport route. Doping In2Se3 nanowires with small amounts of Ga during synthesis can completely change the structural...
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