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Title: Silver Flowerlike Structures for Surface-Enhanced Raman Spectroscopy
Authors: Tsutsumanova, G. G.
Todorov, N. D.
Russev, S. C.
Abrashev, M. V.
Ivanov, V. G.
Lukoyanov, A. V.
Issue Date: 2021
Publisher: MDPI
Citation: Silver Flowerlike Structures for Surface-Enhanced Raman Spectroscopy / G. G. Tsutsumanova, N. D. Todorov, S. C. Russev et al. // Nanomaterials. — 2021. — Vol. 11. — Iss. 12. — 3184.
Abstract: Micro-and nanoflowers are a class of materials composed of particles with high surface-to-volume ratio. They have been extensively studied in the last decade due to simple preparation protocols and promising applications in biosensing, as drug delivery agents, for water purification, and so on. Flowerlike objects, due to their highly irregular surface, may act also as plasmonic materials, providing resonant coupling between optical waves and surface plasmon excitations. This fact allows us to infer the possibility to use micro-and nanoflowers as effective surface-enhanced Raman scattering (SERS) substrate materials. Here, we report on the design and Raman enhancement properties of silver flowerlike structures, deposited on aluminum surface. A simple and cost-effective fabrication method is described, which leads to SERS substrates of high developed surface area. The morphology of the silver flowers on a nanoscale is characterized by self-organized quasiperiodic stacks of nanosheets, which act as plasmonic cavity resonators. The substrates were tested against rhodamine-6G (R6G) water solutions of concentration varying between 10−3 M and 10−7 M. Optimal SERS enhancement factors of up to 105 were established at R6G concentrations in the 10−6–10−7 M range. © 2021 by the authors. Licensee MDPI, Basel, Switzerland.
Access: info:eu-repo/semantics/openAccess
SCOPUS ID: 85119695957
PURE ID: 29067698
ISSN: 2079-4991
metadata.dc.description.sponsorship: This research was funded by the Bulgarian-Russian bilateral project through the contracts KP-06-15/27.09.2019 Russia with the Bulgarian National Fund of Scientific Research (G.G.T, N.D.T., S.C.R., and V.G.I.) and RFBR project No. 19-52-18008 Bulg (A.V.L.).
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