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Comparison of the sample surface structure when different source types were used. (a) Pure source and (b) source in a indium-contaminated alumina tube.
(Color online) Schematic representations of the A1, A2 nanowires, B1, B2 nanobelts, and C1, C2 nanobelts. refers to length, to width, to thickness, and to diameter.
(Color online) Free energy of the nanowire and nanobelt shapes as a function of (a) the total volume in terms of the number of ZnO formula units and (b) the aspect ratio. The change of aspect ratios is made by lengthening along the corresponding principle axis.
(Color online) Free energy of the nanowire and nanobelt shapes as a function of the aspect ratio for dominated growth (a) along ⟨0001⟩ and (b) along . The estimated values for In-doped nanostructures are also shown, with 5% In incorporated preferentially into the and nonpolar surfaces.
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