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项链状AlN纳米线的化学气相沉积法制备及生长机制

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Abstract:

采用催化剂辅助化学气相沉积法,在高温下使铝粉与氮气直接发生反应,合成出普通AlN纳米线,长约数十微米,直径为10~20nm。通过调整加热温度和保温时间,制备出项链状AlN纳米线,长约1~5nm,直径为10~100nm。微观形貌、微结构分析和晶体几何学计算表明项链状AlN纳米线的表面由六方AlN结构中的{1011}晶面组合而成。提出了一种基于气-液-固模式与气-固模式的协作生长机制来解释这种新颖的项链状AlN纳米线的形成。

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