Growth of nitrogenated fullerene-like carbon on Ni islands by ion beam sputtering

Autor(es)

Paredez, P. ^[1] ; Mala da Costa, M. E. H. ^[1] ; Zagonel, L. F. ^[1] ; Ribeiro, C. T. M. ^[1] ; Alvarez, F. ^[1]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Inst Fis Sao Carlos, Sao Carlos, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Carbon; v. 45, n. 13, p. 2678-2684, 2007.
• Citações Web of Science: 12

Resumo

The synthesis and properties of fullerene-like carbon materials containing nitrogen deposited by ion beam sputtering in a high-vacuum chamber are reported. The samples are grown on Si substrate by sequentially depositing a titanium nitride thin film, nanometric nickel particles, and carbon. The carbon nanostructured samples were prepared by sputtering a carbon target in nitrogen and helium-nitrogen atmospheres. The effect of the noble gas on the nanostructure formation is reported. X-ray photoelectron spectroscopy performed in an ultra high-vacuum chamber, attached to the deposition system, reveals the incorporation of nitrogen in the carbon layer coating the nickel particles. Atomic force microscopy shows dome-like shaped structures. Raman spectroscopy and high-resolution transmission electron microscopy show multi-wall graphenes covering the nickel particles. The field emission properties of the structures are reported. (C) 2007 Elsevier Ltd. All rights reserved. (AU)

• Processo FAPESP: 05/53926-1 - Pesquisa e desenvolvimento de novos materiais de interesse em nanotecnologia: aplicações na indústria (micro-) eletrônica e metal-mecânica
• Beneficiário: Fernando Alvarez
• Modalidade de apoio: Auxílio à Pesquisa - Temático