期刊
MATERIALS TODAY NANO
卷 9, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.mtnano.2019.100067
关键词
Surface-enhanced Raman scattering; Flexible substrate; Self-assembly; Surface plasmon resonance; Graphene
资金
- National Science Foundation of China [11604262, 11604263, 91436102, 11374353]
- Shaanxi Province International Cooperation and Exchange Program [2019KW-027]
- Natural Science Basic Research Plan in Shaanxi Province of China [2018JM1052, 2018JQ1070]
- Shaanxi Provincial Education Department [17JF026]
- Fundamental Research Funds for the Central Universities
- National Basic Research Program of China [2016YFA0200802]
In this work, we designed and fabricated a simple and convenient Au nanoparticle/graphene/Au nanoparticle (AuNP/G/AuNP) flexible 'sandwich' substrate on the surface of the polyethylene (PE) film through self-assembly. The coupling effect between the AuNPs enables this substrate to strongly enhance the local electromagnetic field, and graphene can also provide additional chemical improvement. Experimental results show that the low Rh6G concentration (10(-9) M) located on the surface of the AuNP/G/AuNP substrate can be detected. Furthermore, the flexible and transparent AuNP/G/AuNP substrate can detect low concentrations of thiram (0.24 ppm) on the surface of orange peels. This low concentration is below the maximum residue limit (5 ppm) regulated by the National Standard of China in fruits and vegetables. Therefore, this flexible substrate can be used as an effective surface-enhanced Raman scattering sensor for in situ detection in food safety and environmental monitoring. (C) 2019 Elsevier Ltd. All rights reserved.
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