Synthesis of GaN Nanocrystals through Phase Transition from Hexagonal to Cubic Structures upon Laser Ablation in Liquid

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• 作者：P. Liu ; Y. L. Cao ; H. Cui ; X. Y. Chen ; G. W. Yang
• 刊名：Crystal Growth & Design
• 出版年：2008
• 出版时间：February 2008
• 年：2008
• 卷：8
• 期：2
• 页码：559 - 563
• 全文大小：1528K
• 年卷期：v.8,no.2(February 2008)
• ISSN：1528-7505

文摘

The phase transition from hexagonal to cubic GaN has been observed upon pulsed-laser ablation of hexagonal GaN powders in a liquid at room temperature and ambient pressure. At the same time, GaN nanocrystals are synthesized through this hexagonal-to-cubic phase transition. Cathodoluminescence spectroscopy is employed to characterize the luminescence of the synthesized GaN nanocrystals. First-principle calculations are used to clarify the physical and chemical mechanisms of the phase transition from hexagonal to cubic GaN upon pulsed-laser induced solid–liquid interface reaction.