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Hematite nanostructures: Morphology-mediated liquefied petroleum gas sensors

Title
Hematite nanostructures: Morphology-mediated liquefied petroleum gas sensors
Author
한성환
Keywords
alpha-Fe2O3; Structures; Morphology; LPG sensors
Issue Date
2013-05
Publisher
ELSEVIER SCIENCE SA, PO BOX 564, 1001 LAUSANNE, SWITZERLAND
Citation
SENSORS AND ACTUATORS B-CHEMICAL,vol188,p669-674
Abstract
Liquefied petroleum gas (LPG) sensors of hematite nanostructures viz. nanoparticles, nanoparticle-chains and nanorods, chemically synthesized from iron nitrate, sulfate and chloride precursors, respectively, in presence of urea as pH regulating agent are explored. These nanostructures were examined for their structures and morphologies. The Hematite morphology has an impact on crystal structure, Raman shift and charge transfer resistance value. On the basis of results presented herein, we proposed an importance of hematite nanostructures as a sensing material for the LPG sensors. Superior LPG sensor sensitivity of nanoparticles-chains (77.89%) over nanoparticles (68%) and nanorods (58.80%) at 1000 ppm LPG gas levels are imply that the hematite nanostructure (surface area) plays an important role in mediating charge transfer reaction. (C) 2013 Elsevier B.V. All rights reserved.
URI
https://www.sciencedirect.com/science/article/pii/S0925400513008691?via%3Dihubhttp://hdl.handle.net/20.500.11754/44993
ISSN
0925-4005
DOI
10.1016/j.snb.2013.07.072
Appears in Collections:
COLLEGE OF NATURAL SCIENCES[S](자연과학대학) > CHEMISTRY(화학과) > Articles
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