期刊
CERAMICS INTERNATIONAL
卷 38, 期 5, 页码 3563-3567出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.ceramint.2011.12.072
关键词
Gas sensor; Pt-functionalized; Ga2O3 nanowires; CO gas
资金
- Korean Science and Engineering Foundation (KOSEF) through National Research Laboratory (NRL)
Ga2O3 one-dimensional (1D) nanostructures were synthesized using an evaporation technique. The morphology, crystal structure and enhanced sensing properties of the Ga2O3 nanostructures functionalized with Pt to CO gas at 100 degrees C were examined. The diameter and lengths of the 1D nanostructures ranged from a few tens to a few hundreds of nanometers and up to a few hundreds of micrometers, respectively. Pt nanoparticles with diameters of a few tens of nanometers were distributed over the Ga2O3 nanowires. Multiple networked gas sensors fabricated from these Pt-functionalized Ga2O3 nanowires exhibited enhanced electrical responses to CO gas. The responses of the nanowires were improved 27.8, 26.1, 22.0 and 16.9 fold at CO concentrations of 10, 25, 50, and 100 ppm, respectively, Compared to the bare Ga2O3 nanowires. The mechanism responsible for the enhanced gas sensing properties of the Pt-functionalized Ga2O3 nanowires is discussed. (C) 2011 Elsevier Ltd and Techna Group S.r.l. All rights reserved.
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