Issue 19, 2011
From the journal:

CrystEngComm

On the reversed crystal growth of BaZrO3 decaoctahedron: shape evolution and mechanism

Mário L. Moreira,*a   Juan Andrés,b   Valmor R. Mastelaro,c   José A. Varelaa  and  Elson Longoa  

* Corresponding authors

a INCTMN, Department of Physical Chemistry, Institute of Chemistry, Unesp—Universidade Estadual Paulista, Prof. Francisco Degni Street, s/n°, Quitandinha, Araraquara, SP, Brazil
E-mail: mlucio@liec.ufscar.br, mlucio3001@gmail.com
Fax: +55 16 3351 8214
Tel: +55 16 3351 8214

b Departament de Química Física i Analítica, Universitat Jaume I, Campus de Riu Sec, Castelló, Spain

c Instituto de Física de São Carlos, USP, PO Box 369, São Carlos, SP, Brazil

Abstract

BaZrO3 (BZO) nanoparticles were nucleated, grown and subsequently self-assembled into a 3D decaoctahedronal architecture via a microwave-assisted hydrothermal (MAH) method. X-Ray diffraction (XRD), field emission scanning microscopy (FE-SEM), X-ray absorption spectroscopy (XAFS) as well as both photoluminescence (PL) and radioluminescence (RL) emission studies have provided fundamental insight into the nature of the anisotropic crystal growth mechanism of BZO nanocrystals into their final decaoctahedral shape. The growth mechanism of the assembled nanoparticlesvia mesoscale transformations to form BZO decaoctahedrons occurs from the surface to the core along a reversed crystallization route. This pathway is accompanied by a large enhancement of RL emissions while the intensity of PL emissions is enhanced and worsened along the process. The analysis of the results reveals a relationship between the decaoctahedrons obtained and their optical properties.

Graphical abstract: On the reversed crystal growth of BaZrO3 decaoctahedron: shape evolution and mechanism

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Article information

DOI
https://doi.org/10.1039/C1CE05361B
Article type
Paper
Submitted
25 Mar 2011
Accepted
23 Jun 2011
First published
28 Jul 2011

CrystEngComm, 2011,13, 5818-5824

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On the reversed crystal growth of BaZrO3 decaoctahedron: shape evolution and mechanism

M. L. Moreira, J. Andrés, V. R. Mastelaro, J. A. Varela and E. Longo, CrystEngComm, 2011, 13, 5818 DOI: 10.1039/C1CE05361B

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