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 language | English |
|---|---|
| Pages (from-to) | 520-523 |
| Number of pages | 4 |
| Journal | Langmuir |
| Volume | 21 |
| Issue number | 2 |
| DOIs | |
| Publication status | Published - Jan 18 2005 |
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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 journal › Article
}
TY - JOUR
T1 - Direct imaging of surface-enhanced Raman scattering in the near field
AU - Zhang, Peng
AU - Smith, Steve
AU - Rumbles, Gary
AU - Himmel, Michael E.
PY - 2005/1/18
Y1 - 2005/1/18
N2 - 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.
AB - 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.
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UR - http://www.scopus.com/inward/citedby.url?scp=12844265355&partnerID=8YFLogxK
U2 - 10.1021/la048037a
DO - 10.1021/la048037a
M3 - Article
VL - 21
SP - 520
EP - 523
JO - Langmuir
JF - Langmuir
SN - 0743-7463
IS - 2
ER -