硅基片上单壁碳纳米管合成中催化剂元素与碳源的选择性匹配

Selective matching of catalyst element and carbon source in single-walled carbon nanotube synthesis on silicon substrates.

作者信息

Mizuno Kohei, Hata Kenji, Saito Takeshi, Ohshima Satoshi, Yumura Motoo, Iijima Sumio

机构信息

Research Center for Advanced Carbon Materials, National Institute of Advanced Industrial Science and Technology, Tsukuba, 305-8565, Japan.

出版信息

J Phys Chem B. 2005 Feb 24;109(7):2632-7. doi: 10.1021/jp0454117.

DOI:10.1021/jp0454117

PMID:16851268

Abstract

We have studied the compatibility of various catalysts for ethylene and ethanol chemical vapor deposition (CVD) syntheses of single-walled carbon nanotubes (SWNTs) on Si substrates. A strong selectivity between the catalyst elemental species and carbon source was found; SWNT yield for Fe (Co) catalysts was much higher for ethylene (ethanol) CVD than for ethanol (ethylene) CVD. This strong and completely opposite selectivity implies significantly different SWNT growth mechanisms for ethanol and ethylene CVD on Si substrates.

摘要

我们研究了用于在硅衬底上通过乙烯和乙醇化学气相沉积（CVD）法合成单壁碳纳米管（SWNTs）的各种催化剂的兼容性。发现催化剂元素种类与碳源之间存在很强的选择性；对于铁（钴）催化剂，在乙烯（乙醇）CVD中制备单壁碳纳米管的产率比在乙醇（乙烯）CVD中要高得多。这种强烈且完全相反的选择性意味着在硅衬底上乙醇和乙烯CVD制备单壁碳纳米管的生长机制存在显著差异。