Microplasma synthesis of metal nanoparticles for gas-phase studies of catalyzed carbon nanotube growth

被引：63

作者：

Chiang, Wei-Hung ^{[1
]}

Sankaran, R. Mohan ^{[1
]}

机构：

[1] Case Western Reserve Univ, Dept Chem Engn, Cleveland, OH 44106 USA

来源：

APPLIED PHYSICS LETTERS | 2007年 / 91卷 / 12期

关键词：

D O I：

10.1063/1.2786835

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Catalytic properties of metal nanoparticles toward gas-phase carbon nanotube (CNT) growth are presented. Narrow dispersions of iron (Fe) and nickel (Ni) nanoparticles are prepared in a direct current microplasma reactor and subsequently introduced with acetylene (C2H2) and hydrogen (H-2) into a heated flow furnace to catalyze CNT growth. Aerosol size classification and high-resolution transmission electron microscopy show that CNT growth occurs on Ni particles at lower temperatures than that for similarly produced Fe nanoparticles. Activation energies of 117 and 73 kJ/mol are found for Fe and Ni catalyst particles, respectively, suggesting that CNT growth occurs by carbon surface diffusion. (c) 2007 American Institute of Physics.

引用

页数：3

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