Estudo de nanotubos de carbono como fonte de elétron na geração de plasmas / Studies of carbon nanotubes as electron source for plasma generation

AUTOR(ES)
DATA DE PUBLICAÇÃO

2006

RESUMO

Aligned multiwalled carbon nanotubes films were produced by Microwave Plasma on Si/SiO2, Ti/TiN and quartz substrates. Ni and Fe nanoparticles were used as catalyst. The morphology and crystalline structures of the samples were analyzed by high resolution electron microscopy and by Raman spectroscopy. The Raman spectra have presented strong dependence on diameter distribution and type of structural defects. Field emission measurements were carried out in diodetype equipment with parallel plate configuration, which revealed values from 1 to 3V/mm for turn-on field. Good stability was verified for currents of 10-6 A.

ASSUNTO(S)

espectros raman carbon manotubes catodo frio field emission materiais e sensores manoaglomerados materials and sensors nanotubos de carbono engenharia e tecnologia espacial space engineering and technology nanoclusters cold cathode emissão de elétrons por efeito de campo raman spectra

ACESSO AO ARTIGO

Documentos Relacionados