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Observing Plasmonic-Molecular Resonance Coupling on Single Gold Nanorods

Ni, Weihai; Ambjörnsson, Tobias LU ; Apell, Sten Peter; Chen, Huanjun and Wang, Jianfang (2010) In Nano Letters 10(1). p.77-84
Abstract
Strong plasmonic-molecular resonance coupling occurs between noble metal nanocrystals and organic adsorbates when the plasmonic resonance is degenerate with the molecular one. This interaction forms the basis for many fundamental studies and practical applications. We describe here the first direct measurement of the resonance coupling on single gold nanorods. The dark-field scattering technique is employed. The nanorods are embedded in hydrogel to facilitate uniform dye adsorption. The adsorbed dye molecules exhibit both monomer and H-aggregate absorption bands. The same gold nanorods are measured before and after the dye adsorption. Both strong and weak Coupling are investigated by selecting nanorods with different longitudinal plasmon... (More)
Strong plasmonic-molecular resonance coupling occurs between noble metal nanocrystals and organic adsorbates when the plasmonic resonance is degenerate with the molecular one. This interaction forms the basis for many fundamental studies and practical applications. We describe here the first direct measurement of the resonance coupling on single gold nanorods. The dark-field scattering technique is employed. The nanorods are embedded in hydrogel to facilitate uniform dye adsorption. The adsorbed dye molecules exhibit both monomer and H-aggregate absorption bands. The same gold nanorods are measured before and after the dye adsorption. Both strong and weak Coupling are investigated by selecting nanorods with different longitudinal plasmon bands. Excellent agreement between the experiments and an analytic theory is obtained. The resonance coupling reveals a unique three-band structure, The tunability of the coupling on individual nanorods is further demonstrated by photodecomposing the adsorbed dye molecules. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
resonance coupling, gold nanorods, Absorption, dark-field scattering, surface plasmon
in
Nano Letters
volume
10
issue
1
pages
77 - 84
publisher
The American Chemical Society
external identifiers
  • wos:000273428700014
  • scopus:74849127152
ISSN
1530-6992
DOI
10.1021/nl902851b
language
English
LU publication?
yes
id
8a68c763-eb3d-4253-a617-2950c75a2541 (old id 1547793)
date added to LUP
2010-02-23 11:10:14
date last changed
2018-09-23 03:50:16
@article{8a68c763-eb3d-4253-a617-2950c75a2541,
  abstract     = {Strong plasmonic-molecular resonance coupling occurs between noble metal nanocrystals and organic adsorbates when the plasmonic resonance is degenerate with the molecular one. This interaction forms the basis for many fundamental studies and practical applications. We describe here the first direct measurement of the resonance coupling on single gold nanorods. The dark-field scattering technique is employed. The nanorods are embedded in hydrogel to facilitate uniform dye adsorption. The adsorbed dye molecules exhibit both monomer and H-aggregate absorption bands. The same gold nanorods are measured before and after the dye adsorption. Both strong and weak Coupling are investigated by selecting nanorods with different longitudinal plasmon bands. Excellent agreement between the experiments and an analytic theory is obtained. The resonance coupling reveals a unique three-band structure, The tunability of the coupling on individual nanorods is further demonstrated by photodecomposing the adsorbed dye molecules.},
  author       = {Ni, Weihai and Ambjörnsson, Tobias and Apell, Sten Peter and Chen, Huanjun and Wang, Jianfang},
  issn         = {1530-6992},
  keyword      = {resonance coupling,gold nanorods,Absorption,dark-field scattering,surface plasmon},
  language     = {eng},
  number       = {1},
  pages        = {77--84},
  publisher    = {The American Chemical Society},
  series       = {Nano Letters},
  title        = {Observing Plasmonic-Molecular Resonance Coupling on Single Gold Nanorods},
  url          = {http://dx.doi.org/10.1021/nl902851b},
  volume       = {10},
  year         = {2010},
}