Journal
SENSORS AND ACTUATORS B-CHEMICAL
Volume 258, Issue -, Pages 56-63Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2017.11.058
Keywords
Surface-enhanced Raman scattering (SERS); Sponge; Field-deployable detection; Thiram; Handheld portable Raman spectrometer
Funding
- National Key Basic Research Program of China [2013CB934304]
- Natural Science Foundation of China [51632009, 51472245, 21671192, 51628202]
- CASHIPS Director's Fund [YZJJ201701]
- SRG-HSC
- CAS/SAFEA International Partnership Program for Creative Research Teams
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A silver film is in situ grafted on a melamine sponge via the silver mirror reaction. The porous structure of the sponge possesses an enlarged total SERS-active surface area without increasing the overall footprint of the SERS substrate. The Ag-grafted sponge exhibits high SERS activity toward Rhodamine 6G with a concentration down to 0.1 pM. Moreover, the sponge-based substrate also offers a good signal uniformity and reproducibility with a relative signal deviation down to 11.7% and 13.2%, respectively. Furthermore, the Ag-grafted sponge exhibits a limit of detection of 4.23 nM toward adenine and 1.88 nM toward thiram in the aqueous solution by a handheld portable Raman spectrometer. The inexpensive and simple Ag-grafted sponge can be used as an effective SERS substrate, which will find the potential application in field-deployable detection of organic pollutants in the aquatic environment. (c) 2017 Elsevier B.V. All rights reserved.
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