Controllable growth of GeO₂ nanowires with the cubic and hexagonal phases and their photoluminescence

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• 作者：Ruyu  ; Shi ; Ruigang  ; Zhang ; Xiaobo  ; Chen ; Fan  ; Yang ; Qing  ; Zhao ; Jie  ; Yu ; Hua  ; Zhao ; Lin  ; Wang ; Bin  ; Liu ; Liu  ; Bao ; Yan  ; Chen ; Heqing  ; Yang  ; ;   ; ^{hqyang@snnu.edu.cn}
• 关键词：A1. Nanostructures ; A3. Chemical vapor deposition processes ; B1. Nanomaterials ; B1. Oxides
• 刊名：Journal of Crystal Growth
• 出版年：2011
• 出版时间：1 December 2011
• 年：2011
• 卷：336
• 期：1
• 页码：6-13
• 全文大小：1366 K

文摘

Single crystalline GeO₂ nanowires with the cubic and hexagonal structures were synthesized via heating Germanium wafer coated with an Au film at 500?00 ¡ãC under the flow of H₂O vapor/N₂. The Germanium wafer was used as both reagent and substrate for the growth of GeO₂ nanowires. The control over the GeO₂ nanowires with the cubic and hexagonal phases, the diameters of 30?5 nm and the lengths of 2.5?00 ¦Ìm can be achieved by varying the heating temperature and time. The GeO₂ nanowires follow a top-Vapor¨CLiquid¨CSolid growth model. Ultraviolet, violet and blue emissions peaked at 351.9, 396.8 and 480.2 nm, respectively, are observed from the GeO₂ nanowires, which indicate that the GeO₂ nanowires may have potential applications in nanoscale photonic and electronic devices. This low temperature Vapor¨CLiquid¨CSolid growth process may be employed for the controllable synthesis of other oxide nanowires with different crystalline phases, and provides opportunities for both fundamental research and technological applications.