zhpsЖурнал прикладной спектроскопииZhurnal Prikladnoii Spektroskopii0514-7506B. I. Stepanov Institute of Physics of the National Academy of Scienceszhps-530Research Article******АНАЛИЗ ПЛАЗМОННЫХ НАНОМАТРИЦ ЗОЛОТА С ОПТИМАЛЬНЫМ ФАКТОРОМ УСИЛЕНИЯ ПОВЕРХНОСТНО-УСИЛЕННОГО КОМБИНАЦИОННОГО РАССЕЯНИЯ СВЕТА НА ТКАНИ КОЖИ ЧЕЛОВЕКАANALYSIS OF PLASMONIC GOLD NANOSTAR ARRAYS WITH THE OPTIMUM SERS ENHANCEMENT FACTOR ON THE HUMAN SKIN TISSUEGolmohammadiS.GolmohammadiS.

Тебриз

Tabriz

sgolmohammadi@tabrizu.ac.irEtemadiM.EtemadiM.

Тебриз

Tabriz

Школа инженерно-развивающихся технологий, Университет ТебризаSchool of Engineering-Emerging Technologies, University of Tabriz201919032020865838(1)-838(9)Copyright © Golmohammadi S., Etemadi M., 20202020Golmohammadi S., Etemadi M.Golmohammadi S., Etemadi M.Данная работа распространяется под лицензией Creative Commons Attribution 4.0.This work is licensed under a Creative Commons Attribution 4.0 License.https://zhps.ejournal.by/jour/article/view/530

Методом поверхностно-усиленной спектроскопии комбинационного рассеяния света (SERS) проанализированы свойства подложек, образованных массивами наночастиц золота в виде звезд (GNS), ассамблированных на пленке золота и внедренных в ткани кожи человека. Для иммобилизации GNS на пленке Au использован самоассамблированный монослой 3-аминопропилтриэтоксисилана. Обнаружена связь наночастиц с пленкой и между собой, вследствие чего массивы GNS продемонстрировали большее усиление поля, причем чувствительность сенсоров на основе GNS в дальнейшем может быть увеличена. При возбуждении подложки на основе матриц GNS лазерным излучением с λ = 785 нм наблюдался максимальный коэффициент усиления SERS EF = 109. Показано, что нормированный EF зависит от геометрии GNS, толщины пленки Au и расстояния между центрами GNS.

We analyze the performance of the surface-enhanced Raman spectroscopy (SERS) substrate based on high-density gold nanostar nanoparticle (GNS) arrays assembled on the gold film and embedded in the human skin tissue as a surrounding medium. A self-assembled monolayer (SAM) of 3-aminopropyltriethoxysilane (APTES) is used for immobilizing GNSs on the Au film. The GNS-Au film and GNS-GNS coupling in the gap regions and also the GNSs interparticle coupling at their branches are observed, so the GNS arrays show more field enhancements and the sensitivity of the GNS sensor can be increased further. When the SERS substrate based on the GNS arrays is excited by a 785 nm laser line, a maximum enhancement factor (EF) of 109 is observed. It is demonstrated that the normalized EF depends on the geometry of the GNSs, the thickness of the Au film, and the separation distance between the cores of the GNSs.

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The authors declare that there are no conflicts of interest present.