Advances of surface-enhanced Raman and IR spectroscopies: from nano/microstructures to macro-optical design.
Advances of surface-enhanced Raman and IR spectroscopies: from nano/microstructures to macro-optical design.
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DOI：
10.1038/s41377-021-00599-2
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发表时间：
2021-08-04
期刊：
影响因子：
--
通讯作者：
Tian ZQ
中科院分区：
文献类型：
--
作者：
Wang HL;You EM;Panneerselvam R;Ding SY;Tian ZQ
拉曼光谱和红外 (IR) 光谱是强大的分析技术，但检测灵敏度本质上较低。自20世纪20年代以来，已经采取了三个主要步骤（i）改进光激发、收集和检测的光学系统，（ii）自1990年代以来利用基于纳米结构的表面增强拉曼散射（SERS）和表面增强红外吸收（SEIRA），以及（iii）自2010年代以来合理耦合（i）和（ii）以最大化总检测灵敏度。在回顾了SERS和SEIRA的历史之后，我们概述了等离子体激元的原理以及SERS和SEIRA的不同机制。我们描述了光与纳米/微米结构、局域表面等离子体、表面等离子体激元和避雷针效应的各种相互作用。通过设计纳米粒子-纳米粒子和纳米粒子-基底配置，它们的耦合效应可以显着提高表面灵敏度。由于纳米/微米结构具有特定的光学近场和远场行为，我们关注如何系统地设计宏观光学系统以最大化激发效率和检测灵敏度。我们列举了关键的光学设计，特别是基于 ATR 的从可见光到红外光谱区域的定向激发和发射操作模式。我们还介绍了基于扫描探针显微镜的纳米级光谱学的一些最新进展。最后，给出了该领域的前景和进一步发展，重点是新兴技术和方法。本综述重点关注SERS和SEIRA中从纳米/微米到宏观光学设计的进展，特别是纳米/微米和宏观尺度之间的光学耦合。
Raman and infrared (IR) spectroscopy are powerful analytical techniques, but have intrinsically low detection sensitivity. There have been three major steps (i) to advance the optical system of the light excitation, collection, and detection since 1920s, (ii) to utilize nanostructure-based surface-enhanced Raman scattering (SERS) and surface-enhanced infrared absorption (SEIRA) since 1990s, and (iii) to rationally couple (i) and (ii) for maximizing the total detection sensitivity since 2010s. After surveying the history of SERS and SEIRA, we outline the principle of plasmonics and the different mechanisms of SERS and SEIRA. We describe various interactions of light with nano/microstructures, localized surface plasmon, surface plasmon polariton, and lightning-rod effect. Their coupling effects can significantly increase the surface sensitivity by designing nanoparticle–nanoparticle and nanoparticle–substrate configuration. As the nano/microstructures have specific optical near-field and far-field behaviors, we focus on how to systematically design the macro-optical systems to maximize the excitation efficiency and detection sensitivity. We enumerate the key optical designs in particular ATR-based operation modes of directional excitation and emission from visible to IR spectral region. We also present some latest advancements on scanning-probe microscopy-based nanoscale spectroscopy. Finally, prospects and further developments of this field are given with emphasis on emerging techniques and methodologies. This review focuses on the advance of optical design from nano/micro to macro in SERS and SEIRA, especially on the optical coupling between nano/micro and macro scales.
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