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Photovoltaic cells as a highly efficient system for biomedical and electrochemical surface-enhanced Raman spectroscopy analysis

机译：光伏电池作为生物医学和电化学表面增强拉曼光谱分析的高效系统

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摘要

Surface-enhanced Raman scattering (SERS) has been intensively used recently as a highly sensitive, non-destructive, chemical specific, and label-free technique for a variety of studies. Here, we present a novel SERS substrate for: (i) the standard ultra-trace analysis, (ii) detection of whole microorganisms, and (iii) spectroelectrochemical measurements. The integration of electrochemistry and SERS spectroscopy is a powerful approach for in situ investigation of the structural changes of adsorbed molecules, their redox properties, and for studying the intermediates of the reactions. We have developed a conductive SERS platform based on photovoltaic materials (PV) covered with a thin layer of silver, especially useful in electrochemical SERS analysis. These substrates named Ag/PV presented in this study combine crucial spectroscopic features such as high sensitivity, reproducibility, specificity, and chemical/physical stability. The designed substrates permit the label-free identification and differentiation of cancer cells (renal carcinoma) and pathogens (Escherichia coli and Bacillus subtilis). In addition, the developed SERS platform was adopted as the working electrode in an electrochemical SERS approach for p-aminothiophenol (p-ATP) studies. The capability to monitor in real-time the electrochemical changes spectro-electro-chemically has great potential for broadening the application of SERS.
机译：表面增强的拉曼散射（SERS）最近被广泛使用，作为各种研究的高度敏感，无损，化学特异性和无标记技术。这里，我们提出了一种新的SERS基质：（i）标准超痕量分析，（ii）检测全微生物，（III）光谱电化学测量。电化学和SERS光谱的整合是一种强大的方法，用于调查吸附分子，其氧化还原性能的结构变化，以及研究反应的中间体。我们开发了一种基于光伏材料（PV）的导电SERS平台，覆盖着薄薄的银层，特别是在电化学SERS分析中有用。本研究呈现的这些基质名为AG / PV的关键光谱特征，例如高灵敏度，再现性，特异性和化学/物理稳定性。设计的基质允许无标记的癌细胞（肾癌）和病原体（大肠杆菌和枯草芽孢杆菌）的无标记鉴定和分化。此外，在P-氨基噻吩（P-ATP）研究中，采用开发的SERS平台作为电化学SERs方法中的工作电极。在实时监测电化学改变的能力光谱 - 电化学具有巨大促进SERS应用的潜力。

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  • 来源
    《RSC Advances》 |2019年第2期|共16页
  • 作者

    Nicinski K.; Witkowska E.; Korsak D.; Noworyta K.; Trzcinska-Danielewicz J.; Girstun A.; Kaminska A.;

  • 作者单位

    Polish Acad Sci Inst Phys Chem Kasprzaka 44-52 PL-01224 Warsaw Poland;

    Polish Acad Sci Inst Phys Chem Kasprzaka 44-52 PL-01224 Warsaw Poland;

    Univ Warsaw Inst Microbiol Fac Biol Dept Appl Microbiol Miecznikowa 1 PL-02096 Warsaw Poland;

    Polish Acad Sci Inst Phys Chem Kasprzaka 44-52 PL-01224 Warsaw Poland;

    Univ Warsaw Inst Biochem Fac Biol Dept Mol Biol Miecznikowa 1 PL-02096 Warsaw Poland;

    Univ Warsaw Inst Biochem Fac Biol Dept Mol Biol Miecznikowa 1 PL-02096 Warsaw Poland;

    Polish Acad Sci Inst Phys Chem Kasprzaka 44-52 PL-01224 Warsaw Poland;

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  • 正文语种 eng
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