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|Type:||Capítulo de livro|
|Title:||Size-controllable Synthesis And Characterization Of Wide Band Gap Semiconductor Oxide Nanoparticles|
|Abstract:||The preparation of nanoparticles dispersed into solid hosts is nowadays attracting scientific and technological interest because the properties of these hybrid systems are different and often improved, compared with their isolated counterparts. In this chapter we revise the synthesis of controlled-size semiconductor oxide nanoparticles based on the impregnation and decomposition of transition-metal 2-ethylhexanoate-based precursors in mesoporous hosts aiming to prepare MO2 (M = Ti, Ce, and Sn). The pore size of the host material can control the size of the guest material synthesized within it. The linear mass gain for each cycle in the synthesis process is an advantage of this method, because it allows the control of nanoparticle growth via a layer-by-layer assembly. We discuss the results of X-ray diffraction, transmission electron microscopy, and Raman spectroscopy for SnO2, TiO2 and CeO2 nanocrystals. Raman spectroscopy dependence on nanocrystal size allows the use of this technique as prompt characterization tool for estimating nanocrystal size. © 2010 by Nova Science Publishers, Inc. All rights reserved.|
|Editor:||Nova Science Publishers, Inc.|
|Appears in Collections:||Unicamp - Artigos e Outros Documentos|
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