Simonenko Nikolay P, Musaev Andrey G, Simonenko Tatiana L, Gorobtsov Philipp Yu, Volkov Ivan A, Gulin Alexander A, Simonenko Elizaveta P, Sevastyanov Vladimir G, Kuznetsov Nikolay T
Kurnakov Institute of General and Inorganic Chemistry of the Russian Academy of Sciences, 31 Leninsky pr., 119991 Moscow, Russia.
Moscow Institute of Physics and Technology, National Research University, 9 Institutskiy per., 141701 Dolgoprudny, Russia.
Nanomaterials (Basel). 2021 Dec 31;12(1):136. doi: 10.3390/nano12010136.
In this article, a facile, one-step method for the formation of silver thin-film nanostructures on the surface of AlO substrates using the hydrothermal method is proposed. The dependence of the SERS effect intensity of the formed films during the detection of methylene blue (MB) low concentrations on the synthesis conditions, additional temperature treatment, and laser radiation wavelength (532 and 780 nm) in comparison with similar dye films on commercial SERS substrates is shown. The detection limit of the analyte used for the indicated lasers is estimated. The effect of the synthesis temperature on the particle size, crystal structure, and microstructure features of the obtained thin films based on silver nanoparticles is demonstrated. Using spreading resistance microscopy, the interface between the substrate and Ag particles is studied, and the dependence of the size of the corresponding gap between them and the nature of microstructural defects on the parameters of hydrothermal treatment of reaction systems in the presence of AlO substrates is shown. As a result of the study, the factors associated with the properties of the obtained SERS substrates and the parameters of recording the spectra, which affect the amplification factor of the spectral lines intensity of the analyte, are revealed.
本文提出了一种简便的一步法，即利用水热法在AlO衬底表面形成银薄膜纳米结构。展示了在检测低浓度亚甲基蓝（MB）时，所形成薄膜的表面增强拉曼散射（SERS）效应强度与合成条件、额外温度处理以及激光辐射波长（532和780 nm）的关系，并与商业SERS衬底上的类似染料薄膜进行了比较。估算了所使用激光对分析物的检测限。证明了合成温度对基于银纳米颗粒的所得薄膜的粒径、晶体结构和微观结构特征的影响。利用扩展电阻显微镜研究了衬底与银颗粒之间的界面，并展示了在存在AlO衬底的情况下，它们之间相应间隙的大小以及微观结构缺陷的性质与反应体系水热处理参数的关系。研究结果揭示了与所得SERS衬底性质以及光谱记录参数相关的因素，这些因素会影响分析物谱线强度的放大倍数。
