21 April 2016 New SERS-active alumina-based sorbents containing Ag nanoparticles
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Abstract
New SERS-active materials were obtained by preparation of alumina with embedded silver nanoparticles and their application both as sorbents for pre-concentration and SERS platforms was studied. The influence of ionic strength on Ag NPs size, absorption spectra and SERS signal was investigated. Synthesized materials were examined by Raman spectroscopy, scanning electron microscopy, and UV-visible spectroscopy. The optimal conditions for SERSmeasurements were chosen. Synthesized materials were applied for pre-concentration of model analytes (Rhodamine 6G, folic acid and pyrene) and their SERS detection directly within the sorbent. It was shown that the recovery of analytes could be improved by alumina modification. The combination of surface-enhanced Raman spectroscopy with preconcentration is a promising instrument for analytical applications.
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Nadezhda S. Yurova, Natalia E. Markina, Victor V. Galushka, Marina M. Burashnikova, Andrey M. Zakharevich, Alexey V. Markin, Tatiana Yu. Rusanova, "New SERS-active alumina-based sorbents containing Ag nanoparticles", Proc. SPIE 9917, Saratov Fall Meeting 2015: Third International Symposium on Optics and Biophotonics and Seventh Finnish-Russian Photonics and Laser Symposium (PALS), 99171G (21 April 2016); doi: 10.1117/12.2229932; https://doi.org/10.1117/12.2229932
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