Formation of Gold Nanorod Dimers and their Activity for Surface-Enhanced Raman Scattering

  • HAKODA Shuichiro
    Department of Pure and Applied Chemistry, Tokyo University of Science
  • KISU Mikiko
    Department of Pure and Applied Chemistry, Tokyo University of Science
  • TORIGOE Kanjiro
    Department of Pure and Applied Chemistry, Tokyo University of Science
  • ENDO Takeshi
    Department of Pure and Applied Chemistry, Tokyo University of Science
  • SAKAI Kenichi
    Research Institute for Science and Technology, Tokyo University of Science
  • SAKAI Hideki
    Department of Pure and Applied Chemistry, Tokyo University of Science Research Institute for Science and Technology, Tokyo University of Science
  • ABE Masahiko
    Department of Pure and Applied Chemistry, Tokyo University of Science Research Institute for Science and Technology, Tokyo University of Science

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Other Title
  • 金ナノロッド二量体の形成とその表面増強ラマン散乱活性

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Abstract

Side-by-side connected gold nanorod dimers were formed by ligand substitution of hexadecyltrimethylammonium bromide (C16TAB) bilayer with 1-hexylamine. The addition of 1-hexylamine caused a gradual aggregation of gold nanorods, which was verified from blue shift of the longitudinal localized surface plasmon resonance (LSPR) band of gold nanorods. Dimers were found to be preponderant at about 4 h from the addition of 1-hexylamine. Raman intensity of Rhodamine 6G (R6G) molecules in the presence of gold nanorod dimers exhibited a 50-fold and a 15-fold enhancement compared with that of aqueous R6G solution without gold nanorods and with gold nanorod monomers, respectively.

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