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纳米线的蒸汽相合成

Sreeram Vaddiraju¹, Hari Chandrasekaran, Mahendra K Sunkara

¹Department of Chemical Engineering, University of Louisville, Louisville, Kentucky 40292, USA.

Journal of the American Chemical Society

|September 4, 2003

概括

研究人员开发了一种用于金属纳米线的新型蒸汽相合成方法,证明了纳米线的生产. 这种方法利用高温的化学蒸汽运输进行1D生长,适用于其他耐火金属.

科学领域:

材料科学材料科学材料科学
纳米技术纳米技术
化学工程是化学工程的重要组成部分.

背景情况:

金属纳米线的蒸汽相合成对于先进材料至关重要.
现有的方法在高温耐火金属方面面临挑战.
1D纳米结构的受控合成是一个正在进行的研究领域.

研究的目的:

提出一种用于金属纳米线的直接蒸汽相合成的新概念.
为了展示使用化学蒸汽运输的金属纳米线的合成.
探索合成其他耐火金属纳米线的潜力.

主要方法:

在超过金属氧化物分解的温度下利用化学蒸汽传输 (CVT).
控制凝结温度以影响纳米线尺寸.
研究氧化物物种的同时凝结和分解.

主要成果:

成功合成了圆金属纳米线,直径在70至40纳米之间.
证明了1D生长机制,归因于同时的凝结和分解.
建立了高温蒸汽相金属纳米线合成的可行概念.

结论:

拟议的CVT方法使金属纳米线的直接蒸汽相合成成为可能.
合成的纳米线显示出在气体传感器和电子源中的应用潜力.
合成概念适用于各种不易挥发和耐火金属.

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