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  • Title: Increasing gold nanostars SERS response with silver shells: a surface-based seed-growth approach.
    Author: Parmigiani M, Schifano V, Taglietti A, Galinetto P, Albini B.
    Journal: Nanotechnology; 2024 Feb 20; 35(19):. PubMed ID: 38306966.
    Abstract:
    A straightforward method to prepare surface enhanced Raman spectroscopy (SERS) chips containing a monolayer of silver coated gold nanostars (GNS@Ag) grafted on a glass surface is introduced. The synthetic approach is based on a seed growth method performed directly on surface, using GNS as seeds, and involving a green pathway, which only uses silver nitate, ascorbic acid and water, to grow the silver shell. The preparation was optimized to maximize signals obtaining a SERS response of one order of magnitude greater than that from the original GNS based chips, offering in the meantime good homogeneity and acceptable reproducibility. The proposed GNS@Ag SERS chips are able to detect pesticide thiram down to 20 ppb.
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