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Springer, Journal of Materials Science: Materials in Electronics, 22(34), 2023

DOI: 10.1007/s10854-023-11041-1

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Glass supported SERS chips for emerging pollutant analyses

Journal article published in 2023 by B. Albini ORCID, M. Parmigiani ORCID, G. Pellegrini ORCID, A. Taglietti ORCID, P. Galinetto ORCID
This paper was not found in any repository, but could be made available legally by the author.
This paper was not found in any repository, but could be made available legally by the author.

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Abstract

AbstractThe dramatic increase of environmental pollution leads to the demand of new sampling strategies that could perform in-situ monitoring and rapid identification. In this regard, Surface Enhanced Raman Spectroscopy is a good candidate among the possible analytical techniques. Thus, enormous efforts are in course to select best nanoplatforms able to maximize the SERS effect and in turn to reach the lowest limit of pollutant detection. In this work, we investigated the SERS response of colloidal gold nanostars (GNS) coated with a layer of silver with increasing thickness. In particular, we observed a maximum in the SERS signal at a precise silver thickness. The so-optimized GNS@Ag were used to prepare glass supported SERS substrates, displaying good enhancement factor and high homogeneity intra sample. We also evaluate the reproducibility on large-scale production, demonstrating again a good homogeneity of the response and the overall goodness of the substrates. Our glassy SERS-active chips were fruitfully used to detect norfloxacin and thiram, as representative of harmful and toxic pollutants.