Nucleation stability of diamond nanowires inside carbon nanotubes: A thermodynamic approach

被引：25

作者：

Liu, QX ^{[1
]}

Wang, CX ^{[1
]}

Li, SW ^{[1
]}

Zhang, JX ^{[1
]}

Yang, GW ^{[1
]}

机构：

[1] Zhongshan Univ, Sch Phys Sci & Engn, State Key Lab Optoelect Mat & Technol, Guangzhou 510275, Peoples R China

来源：

CARBON | 2004年 / 42卷 / 03期

基金：

美国国家科学基金会; 中国国家自然科学基金;

关键词：

carbon nanotubes; diamond; chemical vapor deposition; thermodynamic analysis;

D O I：

10.1016/j.carbon.2003.12.082

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Aiming at synthesis diamond nanowires, a simple thermodynamic approach was performed with respect to the effect of nanosize-induced additional pressure on the Gibbs free energy of critical nuclei to elucidate diamond nucleation inside carbon nanotubes upon chemical vapor deposition, based on the carbon thermodynamic equilibrium phase diagram. Notably, these analysis showed that the diamond nucleation would be preferable inside a carbon nanotube due to the effect of surface tension induced by the nanosize curvature of the carbon nanotube and diamond critical nuclei, compared with diamond nucleation on the flat surface of a silicon substrate. Meanwhile, the metastable phase region of diamond nucleation would be driven into a new stable phase region in the carbon thermodynamic equilibrium phase diagram by the effect of nano size-induced additional pressure. Eventually, we predicted that carbon nanotubes would be an effective path to grow diamond nanowires by chemical vapor deposition. (C) 2004 Elsevier Ltd. All rights reserved.

引用

页码：629 / 633

页数：5

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