CVD synthesis and purification of single-walled carbon nanotubes using silica-supported metal catalyst

被引：28

作者：

Engel-Herbert, R.

Pforte, H.

Hesjedal, T. ^{[1
]}

机构：

[1] Univ Waterloo, ECE Dept, Nanotechnol Engn Grp, Waterloo, ON N2L 3G1, Canada

[2] Paul Drude Inst Festkorperelekt, D-10117 Berlin, Germany

来源：

MATERIALS LETTERS | 2007年 / 61卷 / 11-12期

基金：

加拿大自然科学与工程研究理事会;

关键词：

carbon nanotubes; catalytic growth; CVD; iron; molybdenum; silica;

D O I：

10.1016/j.matlet.2006.10.004

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We report the growth of single-walled carbon nanotubes (SWNTs) from silica aerogel by methane chemical vapor deposition (CVD). Bimetallic Fe/Mo supported by amorphous silica forms nanostructures that are catalytically active at the growth temperature. Despite the flexibility gained by using silica as a support matrix, the as-grown nanotube samples need to be further purified for applications in nanodevices. Our experiments show that the treatment in hydrofluoric acid selectively removes the silica matrix,while the amorphous carbon deposits can be selectively removed by oxidation. The influence of the oxidation and etching parameters on the SWNT yield is discussed. The optimized purification procedure renders SWNTs only. (c) 2006 Elsevier B.V. All rights reserved.

引用

页码：2589 / 2593

页数：5

共 16 条

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