Solid-liquid-solid growth mechanism of single-wall carbon nanotubes
Solid-liquid-solid growth mechanism of single-wall carbon nanotubes
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DOI：
10.1016/s0008-6223(01)00080-x
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发表时间：
2002-01-01
期刊：
影响因子：
10.9
通讯作者：
Graff, A
中科院分区：
文献类型：
--
作者：
Gorbunov, A;Jost, O;Graff, A
提出的理由表明催化颗粒的液化是通过物理合成技术形成单壁碳纳米管（SWNT）的决定性条件。有人认为，单壁碳纳米管生长机制是一种由熔融过饱和碳金属纳米粒子催化的无定形碳或其他不完美碳形式的固-液-固石墨化。这些纳米颗粒与无定形碳接触后低温熔化，然后以 SWNT 形式沉淀的假设可以定性地解释实验观察到的 SWNT 生长速率和 SWNT 产量的温度依赖性。提出了增加单壁碳纳米管产量的指导方针。 (C) 2002 Elsevier Science Ltd. 保留所有权利。
Reasons are presented which suggest that the liquefaction of the catalytic particles is a decisive condition for formation of single wall carbon nanotubes (SWNTs) by physical synthesis techniques. It is argued that the SWNT growth mechanism is a kind of solid-liquid-solid graphitization of amorphous carbon or other imperfect carbon forms catalyzed by molten supersaturated carbon-metal nanoparticles. The assumption of low temperature melting of these nanoparticles in contact with amorphous carbon followed by its precipitation in the form of SWNTs allows to explain qualitatively the experimentally observed SWNT growth rates and temperature dependence of the SWNT yield. Guidelines for increasing SWNT yield are proposed. (C) 2002 Elsevier Science Ltd. All rights reserved.