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Title: Influence of the iron oxide nanoparticles on the electro-optical properties of graphite and few-layers graphene
Authors: Champi, A.
Bazan Aguilar, A.
Camilo, M.
Quintana, María
Keywords: Iron oxides nanoparticles;Graphite;Few-layers graphene;EPR;Raman
Issue Date: Feb-2016
Publisher: Elsevier Ltd
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Abstract: Spherical iron oxide nanostructures (FexOy NPs) are obtained by laser ablation technique, which are formed primarily by α-hematite (α- Fe2O3), γ-hematite (γ-Fe2O3) and goethite (FeOOH) phases, the dimensions of which are among the 30-60 nm by using the Scanning Electronic Mycroscope (SEM) analysis. These were incorporated superficially on graphite microflakes (MFG, microflakes of graphite) and / or a few layers of graphene microflakes (FLG, few-layer graphene), through a thermal process, in order to observe their influence on the electro-optical properties on MFG and FLG, tested by Raman microspectroscopy, we detect a correlation of Raman shifts before and after doping. This is explained as a change in the dispersion of two phonons at the edges of the C-C chains forming the FLG against the formation of surface defects due to interaction with FexOy NPs after insertion. Finally, a study of the position, the FWHM, the ration between the intensities and the areas of the G and 2D bands was made in all samples with two Raman lasers (λ = 534 nm and 422 nm).
ISSN: 22147853
Rights: info:eu-repo/semantics/restrictedAccess
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