Plasmonic Enhancement of Fluorescence and Raman Scattering by Metal Nanotips

@article{Cade2007PlasmonicEO,
  title={Plasmonic Enhancement of Fluorescence and Raman Scattering by Metal Nanotips},
  author={Nicholas Ian Cade and Ferhat Culfaz and Lior Eligal and Tom Ritman-Meer and Fumin Huang and Frederic Festy and David Richards},
  journal={NanoBiotechnology},
  year={2007},
  volume={3},
  pages={203-211}
}
We report modifications to the optical properties of fluorophores in the vicinity of noble metal nanotips. The fluorescence from small clusters of quantum dots has been imaged using an apertureless scanning near-field optical microscope. When a sharp gold tip is brought close to the sample surface, a strong distance-dependent enhancement of the quantum dot fluorescence is observed, leading to a simultaneous increase in optical resolution. These results are consistent with simulations of the… 

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References

SHOWING 1-10 OF 39 REFERENCES
Mapping surface plasmons on a single metallic nanoparticle
Understanding how light interacts with matter at the nanometre scale is a fundamental issue in optoelectronics and nanophotonics. In particular, many applications (such as bio-sensing, cancer therapy
Tip-enhanced Raman microscopy: practicalities and limitations
The feasibility of apertureless scanning near-field Raman microscopy, exploiting the local enhancement in Raman scattering in the vicinity of a silver or gold tip, was investigated. Using the finite
Resonant excitation of tip plasmons for tip-enhanced Raman SNOM.
The conditions necessary for the optimisation of tip-enhanced scanning near-field optical microscopy have been determined. The Raman scattering efficiency can be enormously increased by enhancements
Shape effects in plasmon resonance of individual colloidal silver nanoparticles
We present a systematic study of the effect of size and shape on the spectral response of individual silver nanoparticles. An experimental method has been developed that begins with the detection and
Surface-enhanced Raman scattering and biophysics
Surface-enhanced Raman scattering (SERS) is a spectroscopic technique which combines modern laser spectroscopy with the exciting optical properties of metallic nanostructures, resulting in strongly
Metal-enhanced fluorescence: Surface plasmons can radiate a fluorophore’s structured emission
In this letter, the authors report the observation of metal-enhanced structured fluorescence emission. Perylene in close proximity to silver island films (SiFs) enhances the structured fluorescence
Spatial imaging of modifications to fluorescence lifetime and intensity by individual Ag nanoparticles
Highly ordered periodic arrays of silver nanoparticles have been fabricated which exhibit surface plasmon resonances in the visible spectrum. We demonstrate the ability of these structures to alter
Factors that influence confocal apertureless near-field scanning optical microscopy
Abstract We demonstrate several influences of a silicon probe of an atomic-force microscope on the fluorescence of single CdSe/ZnS quantum dots on a glass cover slip, measured in a confocal
Tip-enhanced fluorescence imaging of quantum dots
We have imaged the fluorescence from a single quantum dot cluster using an apertureless scanning near-field optical microscope. When a sharp gold tip is brought within a few nanometers from the
Plasmon resonances on metal tips: understanding tip-enhanced Raman scattering.
Calculations of the electric-field enhancements in the vicinity of an illuminated silver tip, modeled using a Drude dielectric response, have been performed using the finite difference time domain
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