In-situ growth of In2O3 nanocones on the surface of indium substrates through thermal oxidation of indium in air
WANG Yong, YIN Wen-yan, DONG Hong-xing, YANG Wen-yu, WANG Ming-zhen, YANG He-qing
(Key Laboratory for Macromolecular Science of Shaanxi Province, College of Chemistry and Materials Science, Shaanxi Normal University, Xi′an 710062, Shaanxi, China)
Abstract:
In2O3 nanocones have been in-situ grown on the surface of indium substrates by heating indium grains coated with an Au film at 900～1000 ℃ in air. The diameters of In2O3 nanocones are increased by increasing the heating temperature and time. The synthesized products were characterized by means of Raman spectroscopy, scanning electron microscopy and transmission electron microscopy. The results show that the In2O3 nanocones are single crystalline phase with the body-center cubic structure, and have a controllable diameter and length in the range of 0.08～0.7 μm and 0.5～3.1 μm, respectively, and Au plays a key role in the growth of In2O3 nanocones. A possible mechanism was also proposed to account for the formation of In2O3 nanocones.
KeyWords:
In2O3; nanocones; in-situ thermal oxidation route; substrates
