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Journal of Nanomaterials
Volume 2015, Article ID 373675, 7 pages
http://dx.doi.org/10.1155/2015/373675
Research Article

A Comparative Study of Er3+, Er3+-Eu3+, Er3+-Tb3+, and Er3+-Eu3+-Tb3+ Codoped Y2O3 Nanoparticles as Optical Heaters

1Programa de Pós-Graduação em Materiais, Universidade Federal de Alagoas, 57072-970 Maceió, AL, Brazil
2Departamento de Física, Universidade Federal de Sergipe, Cidade Universitária Prof. José Aloísio de Campos, Rodovia Marechal Rondon s/n, Jardim Rosa Elze, 57072-970 São Cristóvão, SE, Brazil

Received 27 August 2015; Revised 13 November 2015; Accepted 15 November 2015

Academic Editor: Piaoping Yang

Copyright © 2015 G. A. Sobral Jr. et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Fluorescence intensity ratio (FIR) technique, based on the thermal coupling of and energy levels of erbium ions, was used to study the optical heating behavior of rare earth doped yttrium oxide nanophosphors (Y2O3:Er3+, Y2O3:Er3+-Eu3+, Y2O3:Er3+-Tb3+, and Y2O3:Er3+-Eu3+-Tb3+) synthesized via PVA-assisted sol-gel route. The samples were optically heated by an 800 nm CW diode laser, while the upconverted green emissions were used to measure their temperatures in real time. The experimental results indicate that the studied nanoparticles are promising candidates to applications such as photothermal treatments and hyperthermia.