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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

ISSN号：0454-5648
期刊名称：《硅酸盐学报》
时间：0
分类：TB321[一般工业技术—材料科学与工程]
作者机构：[1]清华大学材料科学与工程系,北京100084, [2]北京航空航天大学材料科学与工程学院,北京100191
相关基金：国家自然科学基金（50729101;50525101;50771058）资助项目

关键词：氮化铝, 项链状纳米线, 化学气相沉积, 气-液-固生长模式, 气-固生长模式, aluminium nitride, necklace-like nanowire, chemical vapor deposition method, vapor-liquid-solid model, vapor-solid model

中文摘要：

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。

英文摘要：

Common AlN nanowires were synthesized by catalyst-aided chemical vapor deposition method through the direct reaction of Al powders and nitrogen at high temperature.The common AlN nanowire is about several tens of micrometer in length and 10-20 nm in diameter.A kind of necklace-like AlN nanowire with length of 1-5 μm and diameter of 10-100 nm was fabricated by adjusting heating temperature and holding time.The morphology,microstructure analysis and crystal geometry computation indicate that the surface of the necklace-like AlN nanowire is assembled with {1011} faces of h-AlN.A cooperative growth mechanism based on the vapor-liquid-solid and vapor-solid model is proposed to explain the formation of this novel necklace-like AlN nanowire.

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