期刊
PHYSICA B-CONDENSED MATTER
卷 451, 期 -, 页码 58-62出版社
ELSEVIER
DOI: 10.1016/j.physb.2014.06.026
关键词
ZnO nanorods-Au nanoparticles; Surface-enhanced Raman scattering; Melamine
资金
- National Natural Science Foundation of China [10804101, 60908023, 11375159]
- Science and Technology Development Foundation of Chinese Academy of Engineering Physics [201080401055]
- Open Foundation of Joint Laboratory for Extreme Conditions Matter Properties
- Southwest University of Science and Technology
- Research Center of Laser Fusion
- CAEP [12zxjk07]
- Ministry of Education [1343-76140000014]
- Hunan Provincial Innovation Foundation for Postgraduate [CX2012B114]
- Open-End Fund for the Valuable and Precision Instruments of Central South University [CSUZC2012032]
In this paper, as a new, highly sensitive and uniform hybrid surface-enhanced Raman scattering (SERS) substrate, arrays of ZnO nanorods (ZnO-NRs) decorated with Au nanoparticles (Au-NPs) have been prepared. This hybrid substrate manifests high SERS sensitivity to melamine and a detection limit as low as 1.0 x 10(-10) M (1.26 mu g L-1). A maximum enhancement factor of 1.0 x 10(9) can be obtained with the ZnO NF-Au (sample 2) film. Au-NPs gaps in the array can create lots of SERS hot spots that mainly contribute to the high SERS sensitivity. Moreover, the supporting chemical enhancement effect of ZnO-NRs and the better enrichment effect ascribed to the large surface area of the substrate also help to achieve a lower detection limit. The promising advantages of easy sample pretreatment, short detection time and low cost makes the arrays of ZnO-NRs decorated with Au-NPs substrate a potential detection tool in the field of food safety. (C) 2014 Elsevier B.V. All rights reserved.
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