期刊
SENSORS AND ACTUATORS B-CHEMICAL
卷 199, 期 -, 页码 339-345出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2014.04.010
关键词
ZnO; Nanorods; Au; Sensor; High performance
资金
- MOE, China [NCET-11-1027, 213021A]
- Shandong Provincial Science Foundation [JQ201214, BS2012CL003]
- Taishan Scholar Professorship [TSHW20091007]
- University of Jinan [XKY11111]
One-dimensional (1D) semiconductor nanostructure has been widely used for gas sensor devices. In this work, a high performance gas sensor based on Au-functionalized ZnO nanorods was fabricated. Au nanoparticles were successfully immobilized onto the surface of ZnO nanorods to serve as a sensitizer by a facile solution reduction process. The hybrid Au/ZnO nanorods have been systematically characterized by XRD, SEM, EDS, TEM and optical absorption spectrum. Gas sensing tests reveal that the Au/ZnO sensor has remarkably enhanced performance compared to pure ZnO. It could detect ethanol gas in a wide concentration range with very high response, fast response-recovery time, good selectivity and stable repeatability. The possible sensing mechanism is discussed. The superior sensing features indicate the present Au/ZnO nanorods are promising for gas sensors. (C) 2014 Elsevier B.V. All rights reserved.
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