Abstract
Three-dimensional (3D) dendrite-like GaN nanostructures with sixfold symmetry branches were synthesized by a secondary Au-catalyzed vapor–liquid–solid (VLS) growth process. X-ray diffraction (XRD) analysis reveals that the as-grown GaN is wurtzite structure. The dendrite-like nanostructures resulted from the branches growth along the six crystallographically equivalent directions of 〈1 0 1¯ 0〉 in a 〈0 0 0 1〉 oriented GaN stem nanowire. The growth model was established and discussed according to the experimental results. Raman scattering spectrums were measured and the differences in Raman spectrums between the first- and second-synthesized products were discussed.
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