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

2002; Brazilian Chemical Society; Volume: 25; Issue: 1 Linguagem: Inglês

10.1590/s0100-40422002000100011

1678-7064

José Gino Venegas Romero, C.A. Luengo, John G. Huber, José Maurício Rosolen,

Graphene research and applications

GRAPHITE IN HELIUM ATMOSPHERE.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.