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Journal of Nanomaterials
Volume 2012 (2012), Article ID 890397, 6 pages
http://dx.doi.org/10.1155/2012/890397
Research Article

Relationship between Crystal Shape, Photoluminescence, and Local Structure in S r T i O 3 Synthesized by Microwave-Assisted Hydrothermal Method

1Instituto de Física de São Carlos, Universidade de São Paulo, 13560-970 São Carlos, SP, Brazil
2Instituto de Química, Universidade Estadual Paulista, 14800-900 Araraquara, SP, Brazil
3Departamento de Física, Universidade Federal de São Carlos, 13565-905 São Carlos, SP, Brazil
4Instituto de Física, Universidade Federal Goiás, 74001-970 Goiânia, GO, Brazil
5Departamento de Química Física y Analítica, Universitat Jaume I 12071 Castelló, Spain

Received 30 November 2011; Revised 1 February 2012; Accepted 15 March 2012

Academic Editor: J. C. Sczancoski

Copyright © 2012 Luís F. da Silva 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

This paper describes the effect of using different titanium precursors on the synthesis and physical properties of SrTiO3 powders obtained by microwave-assisted hydrothermal method. X-ray diffraction measurements, X-ray absorption near-edge structure (XANES) spectroscopy, field emission scanning electron microscopy (FE-SEM), and high-resolution transmission electron microscopy (HRTEM) were carried out to investigate the structural and optical properties of the SrTiO3 spherical and cubelike-shaped particles. The appropriate choice of the titanium precursor allowed the control of morphological and photoluminescence (PL) properties of SrTiO3 compound. The PL emission was more intense in SrTiO3 samples composed of spherelike particles. This behavior was attributed to the existence of a lower amount of defects due to the uniformity of the spherical particles.