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Currently, surface-enhanced Raman spectroscopy (SERS) mainly uses solid-state SERS substrates with high sensitivity. However, when working with them, a complex procedure for sample preparation is required, including the preparation of a liquid analyte. A solution to this problem can be provided by flexible SERS substrates that allow analyte collection by the contact method. In this work, a new method for producing a flexible polymer SERS substrate based on polyvinyl alcohol with plasmonic Ag nanoparticles was proposed. The substrate was formed by applying a polyvinyl alcohol solution with silver nitrate to silicon and glass substrates using the robocasting method, followed by detachment fr om the substrate after drying. Silver nanoparticles are formed as a result of reducing silver nitrate in a polyvinyl alcohol film by thermal annealing in an air atmosphere in the temperature range of 110–160 °С. The optical properties and SERS activity of the obtained substrate were studied using a spectrophotometer and a Raman spectrometer. The solution of malachite green oxalate with micro- and nanomolar concentrations on flexible SERS substrate with 0.1 M silver nitrate was studied. It has been established that the detection lim it of MG is 100 nM and the structure enhancement factor is 6 × 104.
  • Key words: 3D printing, surface-enhanced Raman spectroscopy, SERS substrate, Raman spectroscopy, flexible substrate, robocasting
  • Published in: TECHNOLOGICAL PROCESSES
  • Bibliography link: Chumachenko J. V., Volodchenko M. A., Novikov D. V., Tarasov A. M., Dubkov S. V. Formation and study of flexible SERS substrates by robocasting. Izv.vuzov. Elektronika = Proc. Univ. Electronics. 2025;30(4):432–441. (InRuss.).https://doi.org/10.24151/1561-5405-2025-30-4-432-441.
  • Financial source: the work was carried out within the framework of the implementation of the development program of the National Research University MIET with the support of the state support program for universities of the Russian Federation "Priority-2030" of the national project "Science and Universities" and the State Assignment № FSMR-2024-0012.
Julia V. Chumachenko
National Research University of Electronic Technology (Russia, 124498, Moscow, Zelenograd, Shokin sq., 1)
Mikhail A. Volodchenko
National Research University of Electronic Technology (Russia, 124498, Moscow, Zelenograd, Shokin sq., 1)
Denis V. Novikov
National Research University of Electronic Technology (Russia, 124498, Moscow, Zelenograd, Shokin sq., 1)
Andrey M. Tarasov
National Research University of Electronic Technology (Russia, 124498, Moscow, Zelenograd, Shokin sq., 1)
Sergey V. Dubkov
National Research University of Electronic Technology (Russia, 124498, Moscow, Zelenograd, Shokin sq., 1)

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