Synthesis of thick and crystalline nanotube arrays by spray pyrolysis
Synthesis of thick and crystalline nanotube arrays by spray pyrolysis
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DOI：
10.1063/1.1327611
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发表时间：
2000-11-20
影响因子：
4
通讯作者：
Endo, M
中科院分区：
文献类型：
--
作者：
Kamalakaran, R;Terrones, M;Endo, M
通过在Ar气氛中在相对低的温度（850 ℃）下热解Fe（C5 H5）（2）和C6 H6的喷射（喷雾）溶液来合成大直径（100-250 nm）的对准纳米管阵列。管状结构由高度结晶的嵌套石墨烯圆柱体（< 200个同心管）组成，其尖端通常是开放的。拉曼研究证实了这些“厚”结构的高度完美性。管的直径，排列的程度，和结晶度可以通过改变前体溶液内的Ar流速和Fe：C比来控制。基于这些观察，提出了一种可能的生长机制。由于不存在作为载气的H-2和低热解温度，这种用于合成碳纳米管的低成本路线是有利的。(C)2000年美国物理学会。【S0003-6951（00）03447-1】。
Arrays of aligned nanotubes of large diameter (100-250 nm) are synthesized by pyrolyzing a jet (spray) solution of Fe(C5H5)(2) and C6H6 in an Ar atmosphere at relatively low temperatures (850 degreesC). The tubular structures consist of highly crystalline nested graphene cylinders (< 200 concentric tubes) with tips that are usually open. Raman studies confirm the high degree of perfection of these "thick" structures. Tube diameter, degree of alignment, and crystallinity can be controlled by varying the Ar flow rate and the Fe:C ratio within the precursor solution. Based on these observations a possible growth mechanism is suggested. This low cost route for the synthesis of carbon nanotubes is advantageous due to the absence of H-2 as a carrier gas and the low pyrolytic temperature. (C) 2000 American Institute of Physics. [S0003-6951(00)03447-1].