Silver nanoparticles on cotton swabs for improved surface-enhanced Raman scattering, and its application to the detection of carbaryl

We describe the preparation of a cotton swab for use in surface enhanced Raman scattering (SERS) by assembling silver nanoparticles (Ag-NPs) on common cotton. The flexibility of such cotton swabs allows for a close contact with sample surfaces by swabbing. This can considerably improve the sample co...

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Bibliographic Details
Published in:Mikrochimica acta (1966) 2016-04, Vol.183 (4), p.1307-1313
Main Authors: Qu, Lu-Lu, Geng, Yun-Yan, Bao, Zhi-Nan, Riaz, Sara, Li, Haitao
Format: Article
Language:English
Subjects:
Analytical Chemistry
Carbamates
Characterization and Evaluation of Materials
Chemistry
Chemistry and Materials Science
Cost analysis
Cotton
Fungicides
Microengineering
Nanochemistry
Nanoparticles
Nanotechnology
Original Paper
Raman spectra
Reproducibility
Rhodamine 6G
Silver
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Summary:We describe the preparation of a cotton swab for use in surface enhanced Raman scattering (SERS) by assembling silver nanoparticles (Ag-NPs) on common cotton. The flexibility of such cotton swabs allows for a close contact with sample surfaces by swabbing. This can considerably improve the sample collection efficiency. These cotton swabs exhibit excellent SERS activity as shown by the detection of rhodamine 6G at 0.81 pM concentration. The reproducibility of the intensity of SERS peaks is within 10 %. The applicability is demonstrated by in-situ detection of the fungicide carbaryl on a cucumber with an irregular surface. This combination of superior SERS activity, high reproducibility, accessibility in irregularly-shaped matrices and low-cost production indicates that such swabs offer a large potential in analytical SERS. Graphical Abstract A cost-effective surface enhanced Raman scattering (SERS) cotton swab is developed by assembling silver nanoparticles on common cotton. The SERS cotton swab can be used for in-situ sensitive detection of pesticide residue.
ISSN:0026-3672
1436-5073
DOI:10.1007/s00604-016-1760-4