期刊
MICROSYSTEMS & NANOENGINEERING
卷 7, 期 1, 页码 -出版社
SPRINGERNATURE
DOI: 10.1038/s41378-021-00250-5
关键词
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资金
- National Natural Science Foundation of China [21676115]
- Program for Development of Science and Technology of Jilin Province [20200301043RQ]
- Program for Science and Technology of Education Department of Jilin Province [JJKH20200418KJ]
In this work, ternary Au@Cu2O-Ag NCs were successfully designed and prepared, and a possible SERS enhancement mechanism was proposed based on the investigation of SERS activity and electromagnetic field simulations. These NCs achieved highly sensitive SERS detection of MG and catalyzed its degradation driven by visible light.
Ternary noble metal-semiconductor nanocomposites (NCs) with core-shell-satellite nanostructures have received widespread attention due to their outstanding performance in detecting pollutants through surface-enhanced Raman scattering (SERS) and photodegradation of organic pollutants. In this work, ternary Au@Cu2O-Ag NCs were designed and prepared by a galvanic replacement method. The effect of different amounts of Ag nanocrystals adsorbed on the surfaces of Au@Cu2O on the SERS activity was investigated based on the SERS detection of 4-mercaptobenzoic acid (4-MBA) reporter molecules. Based on electromagnetic field simulations and photoluminescence (PL) results, a possible SERS enhancement mechanism was proposed and discussed. Moreover, Au@Cu2O-Ag NCs served as SERS substrates, and highly sensitive SERS detection of malachite green (MG) with a detection limit as low as 10(-9)M was achieved. In addition, Au@Cu2O-Ag NCs were recycled due to their superior self-cleaning ability and could catalyze the degradation of MG driven by visible light. This work demonstrates a wide range of possibilities for the integration of recyclable SERS detection and photodegradation of organic dyes and promotes the development of green testing techniques.
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