Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/196237
Type: Artigo de periódico
Title: Oriented Carbon Nanostructures Containing Nitrogen Obtained By Ion Beam Assisted Deposition.
Author: Paredez, P
Figueroa, C A
Zagonel, L F
Reichert, F R
Ribeiro, C R M
Point, S
Godon, C
Minea, T M
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: Argon
Carbon
Graphite
Hot Temperature
Ions
Microscopy, Atomic Force
Microscopy, Electron, Scanning
Microscopy, Electron, Transmission
Nanostructures
Nickel
Nitrogen
Oxidation-reduction
Silicon
Spectrometry, X-ray Emission
Spectrum Analysis, Raman
Rights: fechado
Identifier DOI: 
Address: http://www.ncbi.nlm.nih.gov/pubmed/15853135
Date Issue: 2005
Appears in Collections:Artigos e Materiais de Revistas Científicas - Unicamp

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