Abstract
In this study, we investigate the geometrical parameters that control the sensitivity of the plasmon resonance wavelength of a silica−gold nanoshell to changes in its dielectric environment. It was found that the magnitude of the SPR frequency shift upon a change in refractive index of the embedding medium depends primarily on total nanoparticle size and less sensitively on the core/shell ratio. Immobilized nanoshells on a glass substrate showed a 25% decrease in magnitude of the SPR shifts; however, sensitivities as large as Δλ/Δn = 555.4 nm/RIU were obtained for this geometry.
Keywords
NanoshellSurface plasmon resonanceMaterials scienceRefractive indexPlasmonDielectricWavelengthLocalized surface plasmonNanoparticleOpticsResonance (particle physics)Sensitivity (control systems)OptoelectronicsMolecular physicsNanotechnologyChemistryAtomic physicsPhysics
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Publication Info
- Year
- 2004
- Type
- article
- Volume
- 108
- Issue
- 45
- Pages
- 17290-17294
- Citations
- 242
- Access
- Closed
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Cite This
Felicia Tam,
Cristin E. Moran,
Naomi J. Halas
(2004).
Geometrical Parameters Controlling Sensitivity of Nanoshell Plasmon Resonances to Changes in Dielectric Environment.
The Journal of Physical Chemistry B
, 108
(45)
, 17290-17294.
https://doi.org/10.1021/jp048499x
Identifiers
- DOI
- 10.1021/jp048499x