Dual-Mode Sensing of Fe(III) Based on Etching Induced Modulation of Localized Surface Plasmon Resonance and Surface Enhanced Raman Spectroscopy
Convenient, rapid, highly sensitive and on-site iron determination is important for environmental safety and human health. We developed a sensing system for the detection of Fe(III) in water based on 7-mercapto-4-methylcoumarine (MMC)-stabilized silver-coated gold nanostars (GNS@Ag@MMC), exploiting a redox reaction between the Fe(III) cation and the silver shell of the nanoparticles, which causes a severe transformation of the nanomaterial structure, reverting it to pristine GNSs. This system works by simultaneously monitoring changes in the Localized Surface Plasmon Resonance (LSPR) and Surface-Enhanced Raman Spectroscopy (SERS) spectra as a function of added Fe(III). The proposed sensing system is able to detect the Fe(III) cation in the 1.0 × 10<sup>-5</sup>-1.5 × 10<sup>-4</sup> M range, and its selectivity of the GNS@Ag@MMC sensor toward iron has been verified monitoring the LSPR and the SERS response to other cations with a clear selectivity toward Fe(III).
Authors
- Angelo Taglietti (ORCID: https://orcid.org/0000-0003-0141-9201)
- Pietro Galinetto (ORCID: https://orcid.org/0000-0003-2604-4039)
- Benedetta Albini (ORCID: https://orcid.org/0000-0002-9745-5882)
- Miriam Parmigiani (ORCID: https://orcid.org/0000-0001-8094-5968)
Institutions
- University of Pavia (IT)
Publication Details
- Journal
- Nanomaterials
- Published
- 2024-09-10
- DOI
- https://doi.org/10.3390/nano14181467
- Citations
- 1
- Primary Topic
- Gold and Silver Nanoparticles Synthesis and Applications
- Type
- article
- Field-Weighted Citation Impact
- 0.12
Funders
- Ministero dell’Istruzione, dell’Università e della Ricerca
- Università degli Studi di Pavia