期刊
SENSORS AND ACTUATORS B-CHEMICAL
卷 241, 期 -, 页码 1008-1013出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2016.11.021
关键词
Gold nanopopcorns; Surface-enhanced Raman scattering; Chlorpyrifos
资金
- National Natural Science Foundation of China [21475088, 21507087]
- PCSIRT [IRT1269]
- International Joint Laboratory on Resource Chemistry (IJLRC)
- State Key Laboratory of Environmental Chemistry and Ecotoxicology
Chiorpyrifos, one of the broad-spectrum organophosphorus insecticides, is utilized extensively in agriculture. However, chlorpyrifos residues in food and water pose potential risks to human health. In this work, popcorn-like gold nanoparticles were synthesized under mild condition without any surfactant as template and serviced as SERS-active substrate for sensing chlorpyrifos by using a portable Raman spectrometer. The obtained substrate had extremely low background signal and remarkably enhanced SERS signal for detecting trace chlorpyrifos residues in fruit samples due to the hot spots formed between tips of gold nanopopcorns. As a result, the portable SERS-sensor system had a limit of detection at 1 mu M of chlorpyrifos, which met the requirement of national standard. (C) 2016 Elsevier B.V. All rights reserved.
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