Silver Nanopartical over AuFON Substrate for Enhanced Raman Readout and Their Application in Pesticide MonitoringReportar como inadecuado




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1

Beijing Key Laboratory of New Molecular Diagnosis Technologies for Infectious Diseases, Beijing Institute of Radiation Medicine, Beijing 100850, China

2

Department of Occupational and Environmental Health, School of Public Health, Jilin University, Changchun 130021, China

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School of Pharmaceutical Sciences, Jilin University, Changchun 130021, China

4

College of Mechatronics Engineering and Automation, National University of Defense Technology, Changsha 410073, China





*

Authors to whom correspondence should be addressed.



Academic Editor: Derek J. McPhee

Abstract Surface-enhanced Raman detection of thiram is demonstrated by using Ag-nanoparticles Ag NPs on Au film over nanosphere AuFON substrate as the hybrid substrate. The SERS signal of the Ag NPs attached to solid supports is studied. The close coupling together of thousands of Ag NPs on AuFON leads to the generation of hot spots for SERS. The Ag NPs on AuFON can be applied to detect rhodamine-6G R6G with the detection limitation of 10−11 M and the pesticide thiram in acetone with a detection limit of as low as 0.24 ppm, which is much lower than the maximal residue limit MRL of 7 ppm in fruit prescribed by the U.S. Environmental Protection Agency EPA. The hybrid substrates are shown to be highly sensitive for the detection of thriam, which produce highly enhanced Raman signals with good uniformity and reproducibility due to having plenty of hot spots on its surface. View Full-Text

Keywords: SERS; Ag NPs; Au film over nanosphere; hybrid substrate; trace chemical detection SERS; Ag NPs; Au film over nanosphere; hybrid substrate; trace chemical detection





Autor: Kun Guo 1,2, Rui Xiao 1, Xiaoye Zhang 3, Chaoguang Wang 4, Qiqi Liu 1, Zhen Rong 1, Lin Ye 2,* and Suhong Chen 1,*

Fuente: http://mdpi.com/



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