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首页> 外文期刊>Journal of Applied Physics >Localized surface plasmon-induced vibrational excitations in the surface-enhanced Raman scattering using two-dimensional array of silver nanocubes
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Localized surface plasmon-induced vibrational excitations in the surface-enhanced Raman scattering using two-dimensional array of silver nanocubes

机译：使用二维银纳米尺寸的表面增强拉曼散射在表面增强拉曼散射中的局部表面等离子体诱导的振动激发

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摘要

We have investigated the nanoscale structural and vibrational properties of polyvinylpyrrolidone (PVP)-covered silver nanocubes (AgNCs) array. The ordered AgNCs array fabricated on Au(111) by the Langmuir-Blodgett method was utilized for a surface-enhanced Raman scattering (SERS) platform. The local arrangements and the facet structure of AgNCs were observed by various types of microscopies, which revealed that AgNCs form an ordered monolayer and exhibit an atomically flat facet. The vibrational peaks associated with PVP were clearly observed in the Raman spectra owing to the SERS effect by AgNCs. We found that two types of C=O stretching peaks appear in the Raman spectra, of which the appearance patterns depend on the excitation energy of the incident laser. The simulations based on the finite-difference time domain method imply that highly ordered 2D AgNCs enable us to excite localized surface plasmon modes, such as a single particle mode and a gap mode, of AgNCs selectively, leading to vibrational excitation of PVP existed at the surface and the gap of AgNCs.
机译：我们研究了聚乙烯吡咯烷酮（PVP） - 覆盖银纳米核（AGNCS）阵列的纳米级结构和振动性能。通过Langmuir-Blodgett方法在Au（111）上制造的有序AGNCS阵列用于表面增强的拉曼散射（SERS）平台。通过各种类型的显微镜观察到AgNC的局部布置和外分结构，显示AGNC形成有序的单层并展示原子平面。由于AGCS的效果，在拉曼光谱中清楚地观察到与PVP相关的振动峰。我们发现，拉曼光谱中出现两种类型的C = o拉伸峰值，其中外观图案取决于入射激光的激励能量。基于有限差分时域方法的模拟意味着高度有序的2D AGNC，使我们能够选择性地激发局部化表面等离子体模式，例如单个粒子模式和间隙模式，导致PVP的振动激发表面和AGNC的差距。

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  • 来源
    《Journal of Applied Physics》 |2020年第18期|185301.1-185301.8|共8页
  • 作者

    Satoshi Katano; Takeru Iwahori; Ryota Yamasaki; Ayana Mizuno; Atsushi Ono; Yoichi Uehara;

  • 作者单位

    Research Institute of Electrical Communication Tohoku University 2-1-1 Katahira Aoba-ku Sendai 980-8577 Japan;

    Research Institute of Electrical Communication Tohoku University 2-1-1 Katahira Aoba-ku Sendai 980-8577 Japan;

    Graduate School of Science and Technology Shizuoka University Hamamatsu 432-8561 Japan;

    Graduate School of Science and Technology Shizuoka University Hamamatsu 432-8561 Japan;

    Graduate School of Science and Technology Shizuoka University Hamamatsu 432-8561 Japan Research Institute of Electronics Shizuoka University Hamamatsu 432-8011 Japan;

    Research Institute of Electrical Communication Tohoku University 2-1-1 Katahira Aoba-ku Sendai 980-8577 Japan;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
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  • 正文语种 eng
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