Artículos de revistas
Growth of nitrogenated fullerene-like carbon on Ni islands by ion beam sputtering
Registro en:
Carbon. Pergamon-elsevier Science Ltd, v. 45, n. 13, n. 2678, n. 2684, 2007.
0008-6223
WOS:000251033600029
10.1016/j.carbon.2007.07.016
Autor
Paredez, P
da Costa, MEHM
Zagonel, LF
Ribeiro, CTM
Alvarez, F
Institución
Resumen
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. 45 13 2678 2684