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Please use this identifier to cite or link to this item: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/50713

Title: Synthesis and substantially enhanced gas sensing sensitivity of homogeneously nanoscale Pd- and Au-particle decorated ZnO nanostructures
Authors: Yuan-Chang Liang
Wen-Kai Liao
Xian-Shi Deng
Contributors: 國立臺灣海洋大學:材料工程研究所
Keywords: Nanostructure
Thin-film sputtering
Microstructure
Oxide
Response sensitivity
Date: 2014-04
Issue Date: 2018-10-22T03:22:00Z
Publisher: J. Alloys and Compounds
Abstract: Abstract: We successfully prepared Pd- and Au-nanoparticle-decorated ZnO nanostructures (Pd–ZnO and Au–ZnO) by combining sputtered Pd and Au ultrathin films on ZnO surfaces and by postannealing in vacuum. The Pd and Au nanoparticles were homogeneously distributed on ZnO surfaces without substantial aggregation. The ranges of the Pd- and Au-nanoparticle diameters were 4–11 nm and 5–8 nm, respectively. The photoluminescence spectra of the Pd–ZnO and Au–ZnO exhibited a quenched UV emission-band intensity and an increased visible-light emission band intensity compared with those of pure ZnO nanostructures. The results of X-ray photoelectron spectroscopy analysis in this work showed that the Pd–ZnO obtained a higher amount of chemisorbed oxygen and enhanced selectivity to acetone compared with the Au–ZnO. The gas responses of the ZnO nanostructured sensors were substantially improved with noble-metal nanoparticle decoration. The enhanced adsorbed oxygen and molecule-ion conversion rate in using nanoscale noble-metal particle decoration might account for the observed results.
Relation: 559 pp.87-92
URI: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/50713
Appears in Collections:[材料工程研究所] 期刊論文

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