Journal
MONATSHEFTE FUR CHEMIE
Volume 148, Issue 7, Pages 1155-1163Publisher
SPRINGER WIEN
DOI: 10.1007/s00706-017-1990-0
Keywords
Surface-enhanced Raman scattering; Ag NPs/rGO composite; E. coli and S. aureus
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Funding
- National Science Foundation of China [51572114]
- Fundamental Research Funds for the Central Universities [30920140122003]
- Senior Talent Foundation of Jiangsu University [15JDG078]
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Developing facile and environmentally friendly synthesis method to fabricate effective platforms for surface-enhanced Raman scattering (SERS) draws much attention in recent years. Herein, a fast and green method is developed to prepare silver nanoparticles/reduced graphene oxide (Ag NPs/rGO) composite, which exhibits favorable SERS activity in detecting bacteria such as Escherichia coli (E. coli) and Staphylococcus aureus (S. aureus). With high-loading and well-dispersed Ag NPs (average size of similar to 63 nm), the Ag NPs/rGO composite fabricated at a mass ratio of 3:1 between AgNO3 and GO presents the best SERS performance, which may be due to the optimal synergistic effect of electromagnetic enhancement originated from Ag NPs and chemical enhancement originated from rGO sheets. Furthermore, the detection sensitivity of the Ag NPs/rGO composite lowers to 1 x 10(5) CFU/cm(3). [GRAPHICS]
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