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Physical chemistry of Nanogap-Enhanced Raman Scattering(NERS)

机译：纳米间隙增强拉曼散射（NERS）的物理化学

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摘要

Plasmonically coupled electromagnetic field localization has generated a variety of new concepts and applications, and this has been one of the hottest topics in nanoscience, materials science, chemistry, physics and engineering and increasingly more important over the last decade. In particular, plasmonically coupled nanostructures with ultra-small gap (～l-nm or smaller) gap have been of special interest due to their ultra-strong optical properties that can be useful for a variety of signal enhancements such surface-enhanced Raman scattering (SERS) and nanoantenna. These promising nanostructures with extraordinarily strong optical signal, however, have rendered a limited success in widespread use and commercialization largely due to the lack of designing principles, high-yield synthetic strategies with nm-level structural controllability and reproducibility and lack of systematic single-molecule and single-particle level studies. All these are extremely important challenges because even small changes (～1 nm) of the coupled nanogap structures can significant affect plasmon mode and signal intensity and therefore structural and signal reproducibility and controllability can be in question. The plasmonic nanogap-enhanced Raman scattering (NERS) is defined as the plasmonic nanogap-based Raman signal enhancement within plasmonic nanogap particles with ～1 nm gap and a Raman dye positioned inside the gap.
机译：等离子体耦合电磁场的定位已经产生了许多新的概念和应用，这已成为纳米科学，材料科学，化学，物理和工程领域最热门的主题之一，并且在过去十年中变得越来越重要。特别是，具有超小间隙（〜1 nm或更小的间隙）的等离激元耦合纳米结构由于其超强的光学特性而可用于各种信号增强，例如表面增强拉曼散射（ SERS）和纳米天线。然而，这些前景光明的纳米结构具有极强的光信号，但由于缺乏设计原理，具有纳米级结构可控性和可再现性的高产率合成策略以及缺乏系统的单分子，因此在广泛使用和商业化方面取得的成功有限。和单颗粒水平研究。所有这些都是极其重要的挑战，因为偶合的纳米间隙结构即使很小的变化（〜1 nm）也会显着影响等离子体激元模式和信号强度，因此结构和信号的可再现性和可控性可能会受到质疑。等离子体增强的纳米间隙拉曼散射（NERS）被定义为在间隙〜1 nm的间隙和位于间隙内部的拉曼染料的等离子体纳米间隙粒子内基于等离子体纳米间隙的拉曼信号增强。

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  • 来源
    《Nanoimaging and Nanospectroscopy V》|2017年|103500I.1-103500I.9|共9页
  • 会议地点 San Diego(US)
  • 作者

    Yung Doug Suh; Hyun Woo Kim;

  • 作者单位

    Korea Research Institute of Chemical Technology, Daejeon 305-600, South Korea,School of Chemical Engineering, Sungkyunkwan University, Suwon 440-746, South Korea;

    Korea Research Institute of Chemical Technology, Daejeon 305-600, South Korea;

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