Large-scale synthesis of Ga2O3 nanoribbons by a two-step gas flow control |
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| Authors: | Yongbo Li Yingkai Liu Chun-Sing Lee Shuit-Tong Lee |
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| Institution: | 1. Center of Modern Educational Technology, Yunnan Normal University, Kunming, PR China;2. Department of Physics, Yunnan Normal University, Kunming, PR China;3. Center of Super-Diamond and Advanced Films (COSDAF) and Department of Physics and Materials Science, City University of Hong Kong, Hong Kong;4. Key Laboratory of Advanced Technology and Manufacture for Renewable Energy Material, Ministry of Education, Kunming, PR China |
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| Abstract: | β-Ga2O3 nanoribbons have been prepared by a two-step gas flow control, involving adjusting the pressure inside the tube before and after the formation of the nanoribbons. In different temperature areas, separated nanoribbons and nanowires were obtained, which grew via solid–liquid–vapor–solid (SLVS) and vapor–liquid–solid (VLS) mechanisms, respectively. The samples obtained were characterized by means of scanning electron microscopy, transmission electron microscopy, micro-Raman scattering, and photoluminescence. It was found that Ga2O3 nanoribbons had a perfect monoclinic single-crystal structure with a 002] growth direction. The Ga2O3 nanoribbons give ultraviolet, cyan and green light emission at room temperature under excitation at 254 and 325 nm. |
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| Keywords: | A Nanostructures B Crystal growth C Raman spectroscopy and scattering |
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