| Abstract
| - Novel lotus-root-like In2O3 nanostructures with a diameter of ca. 300 nm and a length of 1.5−4.0 μm havebeen prepared by annealing In(OH)3 nanostructures with the same morphology derived from a mild solutionreaction. The hierarchical nanostructures are composed of several segments aggregated orderly from In2O3nanorods with the length of 50−90 nm and diameter of 15−40 nm. The as-prepared products were characterizedby X-ray powder diffractometry (XRD), scanning electron microscopy (SEM), transmission electron microscopy(TEM), Fourier transform infrared (FT-IR), and X-ray photoelectron spectra (XPS) in detail. Furthermore,the effects of reaction parameters on the formation of nanostructures were also discussed, and the hydrolysisand oriented-aggregation mechanism was proposed. Room-temperature photoluminescence (PL) spectra ofthe In2O3 nanostructure showed the peculiar visible emission from the blue to orange region, with the strongestpeak centered at 468 nm.
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