Gram-scale synthesis of highly crystalline, 0-D and 1-D SnO sub(2) nanostructures through surfactant-free hydrothermal process

We report the synthesis of highly crystalline SnO sub(2) nanoparticle and nanorod structures with average diameters well within quantum confinement limit (3.5-6.4 nm), through surfactant-free hydrothermal synthesis. The size and shape of the nanostructures could be controlled by controlling the pH (...

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Bibliographic Details
Published in:Journal of nanoparticle research : an interdisciplinary forum for nanoscale science and technology 2012-07, Vol.14 (7), p.1-10
Main Authors: Pal, Umapada, Pal, Mou, Zeferino, Raul Sanchez
Format: Article
Language:English
Subjects:
Crystal structure
Nanocomposites
Nanomaterials
Nanostructure
Quantum confinement
Synthesis
Tin dioxide
Online Access:Get full text
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Summary:We report the synthesis of highly crystalline SnO sub(2) nanoparticle and nanorod structures with average diameters well within quantum confinement limit (3.5-6.4 nm), through surfactant-free hydrothermal synthesis. The size and shape of the nanostructures could be controlled by controlling the pH (4.5-13.0) of the reaction mixture and the temperature of hydrothermal treatment. Probable mechanisms for the variation of particle size and growth of one-dimensional structures are presented considering the size-dependent crystal solubility at lower pH values of the reaction solution and Ostwald ripening of the quasi-spherical nanoparticles at higher pH values, respectively. Variation of optical band gap energy and hence the effects of quantum confinement in the nanostructures have been studied.
ISSN:1388-0764
1572-896X
DOI:10.1007/s11051-012-0969-3