Stabilized gold nanorod–dye conjugates with controlled resonance coupling create bright surface-enhanced resonance Raman nanotags

Alison McLintock, Hye Jin Lee, Alastair Wark

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

The preparation and characterization of stable and non-aggregated colloidal suspensions of gold nanorod–molecular dye complexes which exhibit very bright surface-enhanced resonance Raman scattering (SERRS) signals is described. A systematic study was performed where both the localized surface plasmon resonance (LSPR) of the nanorod and the molecular resonance of dyes adsorbed onto the rod surface were selectively tuned with respect to the laser excitation wavelengths. Resonance coupling was found to be a significant factor in the overall SERRS enhancement. The polymer stabilized nanorod–dye conjugates were prepared without the added complexity of nanoparticle aggregation as well as having good control over the surface coverage and orientation of the dye molecules. Furthermore, we demonstrate that this new class of Raman nanotags greatly outperforms an approach based on quasi-spherical gold nanoparticles.
LanguageEnglish
Pages18835-18843
Number of pages9
JournalPhysical Chemistry Chemical Physics
Volume15
Issue number43
Early online date2 Oct 2013
DOIs
Publication statusPublished - 21 Nov 2013

Fingerprint

Nanorods
Gold
nanorods
Coloring Agents
dyes
gold
resonance scattering
Raman scattering
Raman spectra
Nanoparticles
nanoparticles
Laser excitation
Surface plasmon resonance
surface plasmon resonance
colloids
Suspensions
Polymers
rods
Agglomeration
Wavelength

Keywords

  • gold nanorod–molecular dye
  • surface enhanced resonance Raman scattering
  • Raman nanotags

Cite this

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Stabilized gold nanorod–dye conjugates with controlled resonance coupling create bright surface-enhanced resonance Raman nanotags. / McLintock, Alison; Lee, Hye Jin; Wark, Alastair.

In: Physical Chemistry Chemical Physics, Vol. 15, No. 43, 21.11.2013, p. 18835-18843.

Research output: Contribution to journalArticle

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AU - McLintock, Alison

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