Effect of solvent refractive index on the surface plasmon resonance nanoparticle optical absorption

Date

2007-12-01

Author

Ertaş, Gülay
Suzer, Sefik

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Optical properties of plasmon coupled silver and gold nanoparticles were studied as a function of the refractive index of the surrounding medium. Our studies confirmed that the effect of changes in the refractive index of the surrounding medium was more difficult to demonstrate from an experimental point of view, because of the very high susceptibility of nanoparticles to aggregate in aqueous and organic solvents. Whereas the position of the absorption bands of triiodide in these solvents shows a clear dependence on medium's refractive index, the surface plasmon band position of silver and gold nanoparticles do not exhibit the same dependence. This is attributed to a non-negligible interaction of these solvents with nanoparticle surfaces.

Subject Keywords

General Materials Science, Bioengineering, General Chemistry, Condensed Matter Physics, Biomedical Engineering

URI

https://hdl.handle.net/11511/34706

Collections

Department of Chemistry, Article