Journal
JOURNAL OF SOLID STATE CHEMISTRY
Volume 182, Issue 4, Pages 677-684Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jssc.2008.12.014
Keywords
BaWO4; Thin films; Microwave assisted chemical bath; deposition
Funding
- Natural Science Foundation of Beijing [4082008]
- Scientific and Technological Development Project of Beijing Education Committee [KM200710005029]
- Opening Project of State Key Laboratory of Green Building Materials [GBM-08-KF104]
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Highly crystallized barium tungstate (BaWO4) thin films with dumbbell-like, kernel-like, bowknot-like and cauliflower-like microstructure were synthesized from an aqueous solution containing barium nitrate, ethylenediamine tetraacetate acid disodium and sodium tungstate, via mild microwave assisted chemical bath deposition process. The resulting BaWO4 films with different morphologies were characterized by X-ray diffraction spectrum, scanning electron microscope, Raman and photoluminescence spectra. The results indicate that the morphologies of final products significantly depend on the reaction conditions including the reaction time, the initial concentration of precursor reagent and the physicochemical characteristics of the Substrates. Furthermore, the oriented aggregation mechanism is proposed as a possible formation mechanism of the films with specific morphologies. (C) 2009 Elsevier Inc. All rights reserved.
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