Direct imaging of surface-enhanced Raman scattering in the near field

Peng Zhang, Steve Smith, Gary Rumbles, Michael E. Himmel

Research output: Contribution to journalArticle

30 Citations (Scopus)

Abstract

By using near-field scanning microscopy/spectroscopy, we show that surface-enhanced Raman scattering (SERS) of rhodamine 6G deposited on self-affine silver colloidal film is localized to small, down to less than 200 nm, portions of the film. The locus of the SERS signals ("hot spots") does not necessarily reside in special topographic elements such as interstices and between nanoparticles. The local SERS enhancement is estimated to be over 3 orders of magnitude higher compared to the far-field measurements. Near-field imaging of SERS directly validates the theory of the optical response of self-affine fractal objects.

Original languageEnglish
Pages (from-to)520-523
Number of pages4
JournalLangmuir
Volume21
Issue number2
DOIs
Publication statusPublished - Jan 18 2005

Fingerprint

Raman scattering
near fields
Raman spectra
Imaging techniques
interstices
loci
rhodamine
Fractals
far fields
fractals
Microscopic examination
Silver
silver
Spectroscopy
Nanoparticles
microscopy
Scanning
nanoparticles
scanning
augmentation

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Colloid and Surface Chemistry

Cite this

Direct imaging of surface-enhanced Raman scattering in the near field. / Zhang, Peng; Smith, Steve; Rumbles, Gary; Himmel, Michael E.

In: Langmuir, Vol. 21, No. 2, 18.01.2005, p. 520-523.

Research output: Contribution to journalArticle

Zhang, Peng ; Smith, Steve ; Rumbles, Gary ; Himmel, Michael E. / Direct imaging of surface-enhanced Raman scattering in the near field. In: Langmuir. 2005 ; Vol. 21, No. 2. pp. 520-523.
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