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Type: Artigo de periódico
Title: Oriented carbon nanostructures containing nitrogen obtained by ion beam assisted deposition
Author: Paredez, P
Figueroa, CA
Zagonel, LF
Reichert, FR
Ribeiro, CRM
Point, S
Godon, C
Minea, TM
Alvarez, F
Abstract: In this paper, we report the deposition of graphite multilayer containing nitrogen covering nanometric nickel particles. In-situ photoelectron emission spectroscopy (XPS) reveals the presence of nitrogen in the carbon layer covering the nickel particles. The field emission properties of the structures are reported. Atomic force microscopy displays regular domelike structures. Raman spectroscopy shows the characteristic frequencies associated with graphite and disordered structures. High-resolution transmission electron microscopy confirms the presence of multiwall well-organized graphite layers covering the nickel particles. Disorder increases on increasing nitrogen content. The samples were prepared in-situ by depositing first a few atomic layers of nickel and subsequent islands formation by thermal annealing. Then, an argon ion beam bombards an ultrapure carbon target and simultaneously the growing film is assisted with a second low-energy nitrogen ion beam (ion beam assisted deposition).
Subject: multiwall carbon nanostructures
nitrogen doping
field emission
ion beam assisted deposition
Country: EUA
Editor: Amer Scientific Publishers
Citation: Journal Of Nanoscience And Nanotechnology. Amer Scientific Publishers, v. 5, n. 2, n. 188, n. 191, 2005.
Rights: fechado
Identifier DOI: 10.1166/jnn.2005.052
Date Issue: 2005
Appears in Collections:Unicamp - Artigos e Outros Documentos

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