用于表面增强和频产生检测的等离激元金纳米孔阵列
Plasmonic Gold Nanohole Arrays for Surface-Enhanced Sum Frequency Generation Detection.
作者信息
Guo Wei, Liu Bowen, He Yuhan, You Enming, Zhang Yongyan, Huang Shengchao, Wang Jingjing, Wang Zhaohui
机构信息
State Key Laboratory of Physical Chemistry of Solid Surfaces, MOE Key Laboratory of Spectrochemical Analysis and Instrumentation, Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China.
College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, China.
出版信息
Nanomaterials (Basel). 2020 Dec 19;10(12):2557. doi: 10.3390/nano10122557.
Nobel metal nanohole arrays have been used extensively in chemical and biological systems because of their fascinating optical properties. Gold nanohole arrays (Au NHAs) were prepared as surface plasmon polariton (SPP) generators for the surface-enhanced sum-frequency generation (SFG) detection of 4-Mercaptobenzonitrile (4-MBN). The angle-resolved reflectance spectra revealed that the Au NHAs have three angle-dependent SPP modes and two non-dispersive localized surface plasmon resonance (LSPR) modes under different structural orientation angles (sample surface orientation). An enhancement factor of ~30 was achieved when the SPP and LSPR modes of the Au NHAs were tuned to match the incident visible (VIS) and output SFG, respectively. This multi-mode matching strategy provided flexible controls and selective spectral windows for surface-enhanced measurements, and was especially useful in nonlinear spectroscopy where more than one light beam was involved. The structural orientation- and power-dependent performance demonstrated the potential of plasmonic NHAs in SFG and other nonlinear sensing applications, and provided a promising surface molecular analysis development platform.
贵金属纳米孔阵列因其迷人的光学特性而在化学和生物系统中得到广泛应用。制备了金纳米孔阵列（Au NHAs）作为表面等离子体激元（SPP）发生器，用于4-巯基苯甲腈（4-MBN）的表面增强和频产生（SFG）检测。角分辨反射光谱表明，在不同的结构取向角（样品表面取向）下，Au NHAs具有三种角度依赖的SPP模式和两种非色散局域表面等离子体共振（LSPR）模式。当Au NHAs的SPP和LSPR模式分别调谐以匹配入射可见光（VIS）和输出SFG时，实现了约30的增强因子。这种多模式匹配策略为表面增强测量提供了灵活的控制和选择性光谱窗口，在涉及多束光束的非线性光谱中尤其有用。结构取向和功率依赖的性能证明了等离子体纳米孔阵列在SFG和其他非线性传感应用中的潜力，并提供了一个有前景的表面分子分析开发平台。
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