1561-5405 10.24151/1561-5405 Proceedings of Universities. Electronics Scientifical and technical journal "Proceedings of Universities. Electronics" Научно-технический журнал «Известия высших учебных заведений. Электроника» 1561-5405 2587-9960 National Research University of Electronic Technology Национальный исследовательский университет "Московский институт электронной техники" 10.24151/1561-5405-2025-30-4-432-441CCLCOS535.33/.34Технологические процессыFormation and study of flexible SERS substrates by robocastingФормирование и исследование гибких ГКР-подложек методом робокастингаЧумаченко Юлия ВячеславовнаЧумаченкоЮлия ВячеславовнаChumachenkoJulia V.Julia V. ChumachenkoВолодченко Михаил АлексеевичВолодченкоМихаил АлексеевичVolodchenkoMikhail A.Mikhail A. VolodchenkoНовиков Денис ВадимовичНовиковДенис ВадимовичNovikovDenis V.Denis V. NovikovТарасов Андрей МихайловичТарасовАндрей МихайловичTarasovAndrey M.Andrey M. TarasovДубков Сергей ВладимировичДубковСергей ВладимировичDubkovSergey V.Sergey V. DubkovНациональный исследовательский университет «МИЭТ» (Россия, 124498, г. Москва, г. Зеленоград, пл. Шокина, 1)01092025Том. 30 №44432441http://ivuz-e.ru/issues/Том 30 №4/formirovanie_i_issledovanie_gibkikh_gkr_podlozhek_metodom_robokastinga/

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.

В настоящее время в спектроскопии гигантского комбинационного рассеяния света (ГКР) применяются твердотельные ГКР-подложки, характеризующиеся высокой чувствительностью. Однако при работе с ними требуется сложная процедура подготовки образцов, включая подготовку жидкого аналита. Решением данной проблемы могут стать гибкие ГКР-подложки, позволяющие проводить забор аналита контактным методом. В работе предложен новый способ получения гибкой полимерной ГКР-подложки на основе поливинилового спирта с плазмонными наночастицами серебра. Подложка сформирована путем нанесения раствора поливинилового спирта с нитратом серебра на кремниевую и стеклянную подложки методом робокастинга с последующим отрывом от подложки после высыхания. Наночастицы серебра образуются в результате восстановления нитрата серебра в пленке из поливинилового спирта посредством термического отжига в воздушной атмосфере в диапазоне температур 110–160 °C. Оптические свойства и ГКР-активность полученной подложки исследованы на спектрофотометре и рамановском спектрометре. Исследован раствор малахитового зеленого микро- и наномолярных концентраций на гибкой ГКР-подложке с 0,1 М нитрата серебра. Установлены предел детектирования и коэффициент усиления структуры, равные 100 нМ и 6 × 104 соответственно.

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