Síntese de nanotubos de carbono de parede simples por sublimação de grafite em atmosfera de hélio


Autoria(s): Romero,José Gino Venegas; Luengo,Carlos Alberto; Huber,John G; Rosolen,José Maurício
Data(s)

01/02/2002

Resumo

Macroscopic samples of fullerene nanostructures are obtained in a modified arc furnace using the electric arc method with a Helium atmosphere at low pressures. High purity graphite rods are used as electrodes but, when drilled and the orifices filled with powders of transition metals (Fe, Co, Ni) acting as catalysts, the resulting particles are carbon nanostructures of the fullerene family, known as Single Wall Nanotubes (SWNTs). They have typical diameters of 1.4 nm, lengths up to tenths of microns and they are arranged together in bundles containing several SWNTs. Those samples are observed and analyzed using Scanning Electron Microscopy (SEM) and Transmission Electron Microscopy (TEM) techniques.

Formato

text/html

Identificador

http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422002000100011

Idioma(s)

pt

Publicador

Sociedade Brasileira de Química

Fonte

Química Nova v.25 n.1 2002

Palavras-Chave #nanotubes #bundles #arc-furnace
Tipo

journal article