Ion-assisted precursor dissociation and surface diffusion: Enabling rapid, low-temperature growth of carbon nanofibers

被引：83

作者：

Denysenko, I.

Ostrikov, K. ^{[1
]}

机构：

[1] Univ Sydney, Sch Phys, Sydney, NSW 2006, Australia

[2] Kharkov Natl Univ, Sch Phys & Technol, Kharkov, Ukraine

来源：

APPLIED PHYSICS LETTERS | 2007年 / 90卷 / 25期

基金：

澳大利亚研究理事会;

关键词：

D O I：

10.1063/1.2750392

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Growth kinetics of carbon nanofibers in a hydrocarbon plasma is studied. In addition to gas-phase and surface processes common to chemical vapor deposition, the model includes (unique to plasma-exposed catalyst surfaces) ion-induced dissociation of hydrocarbons, interaction of adsorbed species with incoming hydrogen atoms, and dissociation of hydrocarbon ions. It is shown that at low, nanodevice-friendly process temperatures the nanofibers grow via surface diffusion of carbon adatoms produced on the catalyst particle via ion-induced dissociation of a hydrocarbon precursor. These results explain a lower activation energy of nanofiber growth in a plasma and can be used for the synthesis of other nanoassemblies. (c) 2007 American Institute of Physics.

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页数：3

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