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Effect of Annealing on Morphology and Photoluminescence of WO3 Nanowires Deposited by Glancing Angle Deposition Techniques

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In this article, vertically aligned WO3 nanowires were synthesized by employing the glancing angle deposition technique. The significant improvement in the crystallinity and surface morphology of the synthesized WO3 nanowires were observed for 500 °C annealed samples and beyond that temperature it starts degrading. The X-ray diffraction confirmed the different phase transition after annealing. Increase in crystallite size from 68.93 nm to 77.41 nm was observed with the increase in annealing temperature from 300 °C to 500 °C. Upon 250 nm excitation, a broad blue emission aroused by near band edge emission is observed. Also, other emission peaks were observed due to the localized states of oxygen vacancies in the conduction band of WO3. Fourier transform infrared result shows the bonding of WO3 nanowires and intensity were greatly enhanced as the annealing temperature increases up to 500 °C. These enhancements in the properties could be applicable for the development of WO3 based nanodevices.
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Keywords: Annealing Effect; GLAD Technique; Nanowires; Photoluminescence Properties; Structural; WO3

Document Type: Research Article

Affiliations: Department of Electronics and Communication Engineering, National Institute of Technology Nagaland, Dimapur 797103, India

Publication date: May 1, 2020

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  • Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
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