Otro
Relationship between Crystal Shape, Photoluminescence, and Local Structure in SrTiO3 Synthesized by Microwave-Assisted Hydrothermal Method
Registro en:
Journal of Nanomaterials. New York: Hindawi Publishing Corporation, p. 6, 2012.
1687-4110
10.1155/2012/890397
WOS:000305028300001
WOS000305028300001.pdf
Autor
da Silva, Luis F.
Avansi, Waldir
Moreira, Mario L.
Mesquita, Alexandre
Maia, Lauro J. Q.
Andres, Juan
Longo, Elson
Mastelaro, Valmor R.
Resumen
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. Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)