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Effect of Synthesis Temperature on the Morphologies, Optical and Electrical Properties of MgO Nanostructures

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Herein, we report the effect of synthesis temperature on the morphologies, optical and electronic properties of magnesium oxide (MgO) nanostructures. The MgO nanostructures were synthesized at different temperatures, i.e., 100 °C, 300 °C, and 600 °C by simple chemical reaction process and their morphology, particle size, optical, and electrical properties were examined by different techniques such as scanning electron microscopy (SEM), X-ray diffraction (XRD), Fourier transform infrared (FTIR) spectroscopy and UV-Vis. spectroscopy. The morphological investigations revealed that various morphologies of MgO nanostructures, i.e., nanoparticles, nanosheet networks, and nanoneedles were synthesized at 100 °C, 300 °C, and 600 °C. The XRD results confirmed that with increasing the synthesis temperature, the crystallinity of the synthesized nanostructures increases. Further, the dielectric properties and AC conductivity at various frequencies for MgO nanostructures were studied which revealed that the dielectric losses decrease with increase in frequency and temperature. In addition, the observed band gap decreases from 4.89 eV to 4.438 eV (100 °C to 600 °C) representing its increase in the conductivity.
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Keywords: MgO; Morphology; Nanostructures; Optical and Electrical Properties

Document Type: Research Article

Affiliations: 1: Nanotechnology & Catalysis Research Centre, University of Malaya, Kuala Lumpur-50603, Malaysia 2: PG Research Department of Physics, Jayaraj Annapackiyam College for Women (Autonomous) Periyakulam 625605, Tamilnadu, India 3: Photonics Research Centre, Faculty Science, University of Malaya, Kuala Lumpur-50603, Malaysia 4: Department of Chemistry, Faculty of Science and Arts, Najran University, Najran 11001, Saudi Arabia 5: Department of Physics, Faculty of Science, King Khalid University, Abha-61421, Saudi Arabia 6: Department of Chemistry, College of Science, King Saud University, Riyadh-11451, Kingdom of Saudi Arabia

Publication date: April 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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