標題: Metal-Cu2O core-shell nanocrystals for gas sensing applications: Effect of metal composition
作者: Lin, Yin-Kai
Chiang, Yu-Ju
Hsu, Yung-Jung
材料科學與工程學系
Department of Materials Science and Engineering
公開日期: 1-Dec-2014
摘要: A fast, versatile citrate-binding approach has been developed to prepare metal-Cu2O core-shell nanocrystals with different metal compositions, such as Au, Ag and Pd. Because of the electron trapping of the metal core, metal-Cu2O nanocrystals exhibited enhanced CO sensing performance in comparison with pure Cu2O. Steady-state photoluminescence and photocurrent measurements were conducted to investigate the electron trapping effect of the metal and its significance in the CO sensing mechanism. Among the three metal-Cu2O nanocrystals tested, Au-Cu2O displayed the highest CO response, attributable to the largest electron trapping capability of Au which enlarged the extent of resistance change for CO detection. The ability to improve the gas sensing performance of Cu2O by means of metal introduction has significant implications in the development of gas sensor technology, especially the strategies of materials combination and heterostructure engineering. (C) 2014 Elsevier B.V. All rights reserved.
URI: http://dx.doi.org/10.1016/j.snb.2014.07.094
http://hdl.handle.net/11536/25306
ISSN: 0925-4005
DOI: 10.1016/j.snb.2014.07.094
期刊: SENSORS AND ACTUATORS B-CHEMICAL
Volume: 204
Issue: 
起始頁: 190
結束頁: 196
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