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Morphology Defined ZnO Nanostructures Through Microwave Assisted Chemical Synthesis: Growth Mechanism, Defect Structure, and Emission Behaviours

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Zinc oxide nanostructures of rod, twisted-needle, petals and flower-like morphologies could be grown by microwave assisted chemical synthesis with excellent reproducibility. Each of the morphologies evolved through controlling the pH of the reaction mixture in between 5.5 and 12.0 before microwave irradiation. Morphology, structural, optical and optoelectronic properties of the nanostructures have been studied using scanning electron microscopy, transmission electron microscopy, X-ray diffraction, micro-Raman spectroscopy and photoluminescence spectroscopy. It has been observed that both the crystallinity and defect structures in the nanostructures depend strongly on synthesis conditions. Mechanisms of morphology evolution and photoluminescence emission behaviours of the nanostructures are presented.
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Document Type: Research Article

Publication date: March 1, 2012

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  • ADVANCED SCIENCE LETTERS is an international peer-reviewed journal with a very wide-ranging coverage, consolidates research activities in all areas of (1) Physical Sciences, (2) Biological Sciences, (3) Mathematical Sciences, (4) Engineering, (5) Computer and Information Sciences, and (6) Geosciences to publish original short communications, full research papers and timely brief (mini) reviews with authors photo and biography encompassing the basic and applied research and current developments in educational aspects of these scientific areas.
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