Nanodiamond-coated carbon nanotubes: Early stage of the CVD growth process

被引：14

作者：

Orlanducci, Silvia ^{[1
]}

Tamburri, Emanuela ^{[1
]}

Terranova, Maria Letizia ^{[1
]}

Rossi, Marco ^{[2
]}

机构：

[1] Univ Roma Tor Vergata, MINASlab, Dip Sci & Tecnol Chim, I-00133 Rome, Italy

[2] Univ Roma Sapienza, Dipartimento Energet, I-00161 Rome, Italy

来源：

CHEMICAL VAPOR DEPOSITION | 2008年 / 14卷 / 7-8期

关键词：

carbon nanotubes; hybrid structures; nanodiamond;

D O I：

10.1002/cvde.200706656

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

A series of deposits formed by single-walled carbon nanotube (SWNT) bundles coated by nanocrystalline diamond (NCD) are produced using a modified CVD reactor. The nanocylindrical structures are deposited on Si substrates using carbon nanopowders and atomic H as reactants. The nanocrystalline coating obtained from short-time runs lasting up to 6 min are analyzed by micro-Raman and cathodoluminescence (CL) techniques, in order to obtain information on the structural evolution of the material during the first steps of the growth process. The morphological investigation performed by field emission scanning electron microscopy (FESEM) indicates that the nanocrystalline coating generated by a process lasting 46 min is formed by protruding embryo diamond crystallites with a needle-like shape. Thereafter the shape of the diamond phase evolves giving rise to elongated and better faceted diamond grains'well anchored on the nanotube bundle surfaces.

引用

页码：241 / 246

页数：6

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