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Role of Thermal Energy Sources in Chemical Solution Process to Synthesize V2O5 Nanostructures

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Nanostructured metal oxide materials are becoming increasingly important for a variety of applications owing to their tunable size and shape dependent functional properties. Especially, the use of nanostructures in fabricating gas sensors has gained significant momentum due to their enhanced receptor and transduction functions during gas–solid sorption processes. In this background, the influence of heat transfer mechanisms namely conduction, convection and radiation from three different thermal sources used in solvothermal, hydrothermal and microwave methods was investigated in due course of formation of V2O5 nanostructures with the same starting precursor of 0.5 M of ammonium metavanadate. Structural, morphological and electrical properties of V2O5 nanostructures were investigated using X-ray diffractometer (XRD), Field Emission Scanning Electron Microscope (FESEM) and Hall measurement system respectively. FESEM micrographs revealed the formation of V2O5 nanostructures with three different morphologies such as nanospheres, nanoflakes and nanoflower. Variation in the electrical resistance of the three nanostructures was found to be varied from 1.5×105 to 2.1×106 Ω due to different degrees of quantum confinement. Also, the room temperature selective gas sensing features of V2O5 nanostructures towards acetone, acetaldehyde, ethanol and ammonia vapours are reported.
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Keywords: Ethanol Sensor; Nanoflakes; Nanoflowers; Nanospheres; V2O5

Document Type: Research Article

Affiliations: 1: Nano Sensors Lab @ Centre for Nanotechnology and Advanced Biomaterials (CeNTAB) 2: Institute of Innovative Science and Technology, Tokai University, Hiratsuka, Kanagawa, 259-1292, Japan 3: Micro/Nano Technology Center, Tokai University, Hiratsuka, Kanagawa, 259-1292, Japan

Publication date: November 1, 2018

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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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