Measuring the range of plasmonic interaction
| Autor: | Steffen Mitzscherling, Matias Bargheer, Madlen Klötzer, M. Kiel |
|---|---|
| Rok vydání: | 2012 |
| Předmět: |
Range (particle radiation)
Materials science Absorption spectroscopy business.industry Context (language use) Surfaces and Interfaces Condensed Matter Physics Molecular physics Reflection (mathematics) Optics Electrochemistry Dissipative system Particle General Materials Science Surface plasmon resonance business Spectroscopy Plasmon |
| Zdroj: | Langmuir : the ACS journal of surfaces and colloids. 28(10) |
| ISSN: | 1520-5827 |
| Popis: | When gold nanoparticles are covered with nanometric layers of transparent polyelectrolytes, the plasmon absorption spectrum A(λ) increases by a factor of approximately three and shifts to the red. These modifications of dissipative experimental observables stop when the cover layer thickness approaches the particle diameter. Spectral modifications of dispersive parameters like the reflection R, however, keep changing with increasing cover layer thickness. The shift of the plasmon resonance caused by two interacting particle layers is studied as a function of the separating distance between the two layers. We discuss these observations in the context of an effective medium theory and conclude that it can only be applied for a layer thickness on the order of the particle diameter. |
| Databáze: | OpenAIRE |
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