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Decoration of graphene films with europium oxide through the R.F. sputtering technique

Published online by Cambridge University Press:  27 December 2019

R. Rangel*
Affiliation:
División de Estudios de Posgrado, Facultad de Ingeniería Química, Universidad Michoacana de San Nicolás de Hidalgo, Z.C. 58060 Morelia, Michoacán, México
V. J. Cedeño
Affiliation:
Instituto tecnológico del valle de Morelia, Morelia, Michoacán, México
J. L. Cervantes
Affiliation:
División de Estudios de Posgrado, Facultad de Ingeniería Química, Universidad Michoacana de San Nicolás de Hidalgo, Z.C. 58060 Morelia, Michoacán, México Instituto tecnológico del valle de Morelia, Morelia, Michoacán, México
P. Bartolo-Pérez
Affiliation:
Instituto tecnológico del valle de Morelia, Morelia, Michoacán, México
J. A. Montes
Affiliation:
Departamento de Física, Matemáticas e Ingeniería, Universidad Estatal de Sonora, Lázaro Cárdenas del Río No.100, Francisco Villa, Navojoa. Sonora, México
A. Ramos-Carrazco
Affiliation:
Universidad de Sonora, Z.C. 83000, Hermosillo, Sonora, México
E. Adem
Affiliation:
Instituto de Física, UNAM. Apartado Postal 20-364, 01000,Ciudad de México, México
*
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Abstract

The present work is aimed to study a comparison among synthesized graphene films, deposited on copper substrates and commercial graphene films; both decorated with Eu2O3 particles, with the purpose of promoting photoluminescence. The decoration procedure was achieved using the radio frequency sputtering (R.F. Sputtering) technique for the deposition of Eu2O3 on synthesized or commercial graphene films. The SEM obtained images, show differences in morphology when commercial and synthesized graphene films are compared. Our results indicate that the type of surface is the main factor that accounts for the europium oxide spatial distribution that ultimately leads to luminescence enhancing. The x-ray photoelectron spectroscopy (XPS) analyses, showed the trivalent oxidation state of europium and the atomic content of Europium for both; the commercial graphene film and synthesized one, where the first one presented the higher europium concentration. Analysis by Raman spectroscopy reveals that graphene films become disordered after the decoration is achieved. The main Raman bands of the commercial graphene films undergo a remarkable red shift, as a consequence of the presence of europium oxide It was observed that the interaction of Eu2O3 with the sp2 levels of graphene, improves the red photoluminescence of the samples grown on both, commercial and prepared graphene films.

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Articles
Copyright
Copyright © Materials Research Society 2019 

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