Surface-bound chemical vapour deposition of carbon nanotubes: In situ study of catalyst activation

被引：14

作者：

Mattevi, C. ^{[1
,2
]}

Hofmann, S. ^{[3
]}

Cantoro, M. ^{[3
]}

Ferrari, A. C. ^{[3
]}

Robertson, J. ^{[3
]}

Castellarin-Cudia, C. ^{[4
]}

Dolafi, S. ^{[4
]}

Goldoni, A. ^{[4
]}

Cepek, C. ^{[2
]}

机构：

[1] Univ Padua, Dipartimento Sci Chim, I-335131 Padua, Italy

[2] INFM, CNR, Lab Nazl TASC, I-34012 Trieste, Italy

[3] Univ Cambridge, Dept Engn, Cambridge CB3 0FA, England

[4] Sincrotrone Trieste SCpA, Div Surface Sci, I-34012 Trieste, Italy

来源：

PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES | 2008年 / 40卷 / 07期

关键词：

carbon nanotubes; CVD; XPS; spectroscopy;

D O I：

10.1016/j.physe.2007.10.024

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

We combine in situ X-ray photoelectron spectroscopy and ex situ electron and Raman spectroscopy to study chemical interactions of SiO2-supported Fe catalyst films during C2H2 exposure in the 400-600 degrees C temperature range. Carbon nanotubes nucleate at C,H, pressures below 10(-6) mbar, which allows a time-resolved recording of core level spectra. We find a rapid transition from an initial chemisorbed carbon on metallic Fe catalyst nanoparticles to a sp(2) graphitic carbon network. Pre-treating the Fe catalyst film by H-2 sputtering influences the initial catalyst de-wetting and increases carbon nanotube yield. (C) 2007 Elsevier B.V. All rights reserved.

引用

页码：2238 / 2242

页数：5

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