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Spatially Uniform and Quantitative Surface-Enhanced Raman Scattering under Modal Ultrastrong Coupling Beyond Nanostructure Homogeneity Limits.
Suganami, Yoshiki; Oshikiri, Tomoya; Mitomo, Hideyuki; Sasaki, Keiji; Liu, Yen-En; Shi, Xu; Matsuo, Yasutaka; Ijiro, Kuniharu; Misawa, Hiroaki.
Afiliación
  • Suganami Y; Research Institute for Electronic Science, Hokkaido University, Sapporo 001-0021, Japan.
  • Oshikiri T; Research Institute for Electronic Science, Hokkaido University, Sapporo 001-0021, Japan.
  • Mitomo H; Institute of Multidisciplinary Research, Tohoku University, Sendai 980-8577, Japan.
  • Sasaki K; Research Institute for Electronic Science, Hokkaido University, Sapporo 001-0021, Japan.
  • Liu YE; Institute of Multidisciplinary Research, Tohoku University, Sendai 980-8577, Japan.
  • Shi X; Research Institute for Electronic Science, Hokkaido University, Sapporo 001-0021, Japan.
  • Matsuo Y; Research Institute for Electronic Science, Hokkaido University, Sapporo 001-0021, Japan.
  • Ijiro K; Creative Research Institution, Hokkaido University, Sapporo 001-0021, Japan.
  • Misawa H; Research Institute for Electronic Science, Hokkaido University, Sapporo 001-0021, Japan.
ACS Nano ; 18(6): 4993-5002, 2024 Feb 13.
Article en En | MEDLINE | ID: mdl-38299996
ABSTRACT
We developed a substrate that enables highly sensitive and spatially uniform surface-enhanced Raman scattering (SERS). This substrate comprises densely packed gold nanoparticles (d-AuNPs)/titanium dioxide/Au film (d-ATA). The d-ATA substrate demonstrates modal ultrastrong coupling between localized surface plasmon resonances (LSPRs) of AuNPs and Fabry-Pérot nanocavities. d-ATA exhibits a significant enhancement of the near-field intensity, resulting in a 78-fold increase in the SERS signal for crystal violet (CV) compared to that of d-AuNP/TiO2 substrates. Importantly, high sensitivity and a spatially uniform signal intensity can be obtained without precise control of the shape and arrangement of the nanoscale AuNPs, enabling quantitative SERS measurements. Additionally, SERS measurements of rhodamine 6G (R6G) on this substrate under ultralow adsorption conditions (0.6 R6G molecules/AuNP) show a spatial variation in the signal intensity within 3%. These findings suggest that the SERS signal under modal ultrastrong coupling originates from multiple plasmonic particles with quantum coherence.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: ACS Nano Año: 2024 Tipo del documento: Article País de afiliación: Japón Pais de publicación: Estados Unidos
Texto completo
Añadir a Mi BVS
Imprimir
XML
PubMed Links
Buscar en Google

Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: ACS Nano Año: 2024 Tipo del documento: Article País de afiliación: Japón Pais de publicación: Estados Unidos