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Large-Area Plasmon Mapping via an Optical Technique: Silver Nanohole Array and Nano-Sawtooth Structures
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    C: Spectroscopy and Dynamics of Nano, Hybrid, and Low-Dimensional Materials

    Large-Area Plasmon Mapping via an Optical Technique: Silver Nanohole Array and Nano-Sawtooth Structures
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    • Masanori Sakamoto*
      Masanori Sakamoto
      Department of Chemistry, Graduate School of Science, Hiroshima University, 1-3-1 Kagamiyama, Higashi-Hiroshima, Hiroshima 739-8526, Japan
      *Email: [email protected]
    • Ken-ichi Saitow*
      Ken-ichi Saitow
      Department of Chemistry, Graduate School of Science, Hiroshima University, 1-3-1 Kagamiyama, Higashi-Hiroshima, Hiroshima 739-8526, Japan
      Department of Materials Science, Natural Science Center for Basic Research and Development (N-BARD), Hiroshima University, 1-3-1 Kagamiyama, Higashi-Hiroshima, Hiroshima 739-8526, Japan
      Department of Chemistry, Graduate School of Advanced Science and Engineering, Hiroshima University, 1-3-1 Kagamiyama, Higashi-Hiroshima, Hiroshima 739-8526, Japan
      *Email: [email protected]
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    The Journal of Physical Chemistry C

    Cite this: J. Phys. Chem. C 2023, 127, 27, 13105–13111
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    https://doi.org/10.1021/acs.jpcc.3c01919
    Published June 8, 2023
    Copyright © 2023 American Chemical Society

    Abstract

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    Silver nanostructures are among the most important platforms for developing efficient plasmonic materials, and edges and/or spikes in such structures can produce highly localized surface plasmons, resulting in dramatic electromagnetic field enhancement. In addition, if the enhanced field and/or localized surface plasmons were to be visualized in a periodic structure with long-range order, then this data would be invaluable for plasmonics researchers and engineers. Herein, we present an optical technique for plasmon mapping in the silver nanohole array and edge (nano-sawtooth) structures over large areas (∼10 μm). Plasmon mapping via two-dimensional fluorescence intensity enhancement quantification with submicrometer spatial resolution revealed high enhancement factors of up to 200 for the nano-sawtooth structure. These measurements were performed alongside atomic force microscopy, scanning electron microscopy, and finite-difference time-domain calculations, and the enhancement mechanism was investigated. Furthermore, the silver nanohole array and nano-sawtooth structures were fabricated using straightforward and cost-effective processes.

    Copyright © 2023 American Chemical Society

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    Supporting Information

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    The Supporting Information is available free of charge at https://pubs.acs.org/doi/10.1021/acs.jpcc.3c01919.

    • Literature values of enhancement factors for surface-enhanced fluorescence using Ag; SERS using the Ag nano-sawtooth structure; source images for the merged plasmon mapping, optical microscopy, and SEM image; plasmon mapping of different nanohole arrays and nano-sawtooth structures; enhancement of fluorescence intensity of other dyes (PDF)

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    Cited By

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    This article is cited by 1 publications.

    1. Ken-ichi Saitow. 1D, 2D, and 3D Mapping of Plasmon and Mie Resonances: A Review of Field Enhancement Imaging Based on Electron or Photon Spectromicroscopy. The Journal of Physical Chemistry C 2024, 128 (13) , 5367-5393. https://doi.org/10.1021/acs.jpcc.3c07393

    The Journal of Physical Chemistry C

    Cite this: J. Phys. Chem. C 2023, 127, 27, 13105–13111
    Click to copy citationCitation copied!
    https://doi.org/10.1021/acs.jpcc.3c01919
    Published June 8, 2023
    Copyright © 2023 American Chemical Society

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