Carbon nanowalls as a platform for biological SERS studies

Pavel Dyakonov, Kirill Mironovich, Sergey Svyakhovskiy, Olga Voloshina, Sarkis Dagesyan, Andrey Panchishin, Nikolay Suetin, Victor Bagratashvili, Petr Timashev, Evgeny Shirshin, Stanislav Evlashin

    Результат исследований: Вклад в журналСтатьярецензирование

    20 Цитирования (Scopus)

    Аннотация

    Herein we report about developing new type of Surface Enhanced Raman Scattering (SERS) substrates based on Au-decorated carbon nanowalls. The designed substrates possess high specific surface area and high sensitivity. Chemical stability of Au perfectly blends with electrical properties and high value of specific surface area of carbon nanowalls. Created structures were applied to detect signals of a typical molecule used for SERS substrates testing, rhodamine 6G, which exhibits electronic absorption in the visible area of spectrum, and biomacromolecules such as tryptophan, guanine, bovine serum albumin and keratin hydrolysates, whose electronic absorption is in the ultraviolet region of spectrum and lies far from the Au plasmonic resonance. The obtained signals for these compounds suggest that the developed substrate is a prominent platform for the detection of biological macromolecules. The properties of the substrate, including its morphology and Au film thickness, as well as the analyte deposition method, were optimized to achieve the optimum Raman signal enhancement. Electric field distribution in the designed structures was calculated to describe the observed dependence of SERS activity on the substrate morphology.

    Язык оригиналаАнглийский
    Номер статьи13352
    ЖурналScientific Reports
    Том7
    Номер выпуска1
    DOI
    СостояниеОпубликовано - 1 дек. 2017

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