In(OH)3 and In2O3 nanorice and microflowers: morphology transformation and optical properties
Source abstract
Abstract
In this work, In(OH)3 and In2O3 nanostructures with controllable complex morphologies were successfully synthesized through a simple hydrothermal process followed by annealing. The In(OH)3 nanostructures were synthesized using urea as the alkaline source at a relatively low temperature without any templates or surfactants. The morphology transformation of In(OH)3 from nanorice to microflowers was observed. The In(OH)3 nanorice are 180 nm in diameter and 550 nm in length, the microflowers are about 3 μm in diameter and composed of thin nanoflakes with 4-nm thickness. In2O3 with similar morphology was formed by annealing In(OH)3 precursors. The nanostructures were characterized using X-ray diffraction, scanning electron microscopy, and transmission electron microscopy. Our results suggest that a new nucleation-growth-etching-regrowth mechanism can explain the morphology transformation from nanorice to flower-like frameworks. Raman spectrum and photoluminescence (PL) properties of In2O3 were also measured, and a 3-nm blue-shift of PL spectrum was observed due to the thinness of the nanostructures.
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Research context
OpenAlex topics: Gas Sensing Nanomaterials and Sensors · ZnO doping and properties · Transition Metal Oxide Nanomaterials
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