Near-field Raman imaging and electromagnetic field confinement in the self-assembled monolayer array of gold nanoparticles

Mohammad Kamal Hossain, Toru Shimada, Masahiro Kitajima, Kohei Imura, Hiromi Okamoto

Research output: Contribution to journalArticle

33 Citations (Scopus)

Abstract

Spatial distribution of surface enhanced Raman activity is visualized for two-dimensional (2D) nearly close-packed and well-ordered monolayer array of gold nanoparticles by using scanning near-field optical microscope. The 2D arrays exhibit highly nonuniform enhancement in Raman scattering, i.e., the regions along the edge of the 2D array are preferentially enhanced. We demonstrate that the spatial distribution of the localized electric field is also nonuniform and agrees well with that of the Raman enhancement.

Original languageEnglish
Pages (from-to)9241-9244
Number of pages4
JournalLangmuir
Volume24
Issue number17
DOIs
Publication statusPublished - 2008 Sep 2
Externally publishedYes

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Spectroscopy
  • Electrochemistry

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