Dubkov, S.V., Novikov, D.V., Bandarenka, H.V.  ORCID: https://orcid.org/0000-0003-4254-8261, Burko, A.A., Trifonov, A.Y., Volkova, L.S., Edelbekova, P.A., Lebedev, E.A., Skryleva, E.A. and Gromov, D.G.
2024.
Express formation and characterization of SERS-active substrate from a non-degradable Ag-Nb-N-O film.
Applied Surface Science
645
, 158682.
10.1016/j.apsusc.2023.158682
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Abstract
In this work, we propose an original approach for rapid and easy conversion of a thin Ag-Nb-N-O film into surface enhanced Raman scattering (SERS) active substrate. The initial Ag-Nb-N-O substrate has a long shelf life because silver particles are prevalently accumulated inside the film and possess resistivity to degradation. An activation of the substrate is carried out just before the SERS-measurements by a 15-second microwave heating the Ag-Nb-N-O film at 800 W, which facilitates immediate extrusion of internal silver to the surface. This leads to the formation of a dense array of Ag particles that show an improved SERS-activity. We compare SERS-activity of the initial and microwave-treated Ag-Nb-N-O films with that of a control substrate based on Ag nanoparticles grown on the SiO2 surface. Both initial and control substrates are aged in a moist air for 60 days before the SERS-measurements. An intensity of the SERS-signal from 10-5 M 5,5′-Dithiobis(2-nitrobenzoic acid) or DTNB on the activated Ag-Nb-N-O film is approx. 270 higher than that on the control Ag nanoparticles. The TEM and EDS studies of the initial Ag-Nb-N-O film prove its stability to sulfidization while the control Ag nanoparticles are found to bind to sulfur from the moist air.
| Item Type: | Article |
|---|---|
| Date Type: | Publication |
| Status: | Published |
| Schools: | Schools > Physics and Astronomy |
| Publisher: | Elsevier |
| ISSN: | 0169-4332 |
| Date of Acceptance: | 15 October 2023 |
| Last Modified: | 07 Sep 2026 21:52 |
| URI: | https://orca.cardiff.ac.uk/id/eprint/188422 |
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