Plasmon resonances in large noble-metal clusters
By C. Sönnichsen, T. Franzl, T. Wilk, G. Plessen, J. Feldmann. 2002
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We investigate the optical properties of spherical gold and silver clusters with diameters of 20 nm and larger. The light scattering spectra of individual clusters are measured using dark-field microscopy, thus avoiding inhomogeneous broadening effects. The dipolar plasmon resonances of the clusters are found to have nearly Lorentzian line shapes. With increasing size we observe polaritonic red-shifts of the plasmon line and increased radiation damping for both gold and silver clusters. Apart from some cluster-to-cluster variations of the plasmon lines, agreement with Mie theory is reasonably good for the gold clusters. However, it is less satisfactory for the silver clusters, possibly due to cluster faceting or chemical effects.
Subfields: Atmospheric Science, Biomedical Engineering, Electronic, Optical and Magnetic Materials
View Paper: https://www.semanticscholar.org/paper/6dc534cf31c94494361c143bdd1b6005dea219b6
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In Atmospheric Science
In Biomedical Engineering
In Electronic, Optical and Magnetic Materials
Citations in the corpus
- Synthesis and antibacterial activity of silver nanoparticles with different sizes (2008, background): “It is reported that the absorption spectrum of spherical silver nanoparticles present a maximum between 420 and 450 nm with a blue or red shift when particle size diminishes or increases, respectively (Pal et al. 2007; Jana et al. 1999; Manna et al. 2001; Sönnichsen et al. 2002).”
- Plasmonics: Fundamentals and Applications (2007, background): “More details on the physics of the damping can be found in [Link and El-Sayed, 2000, Sönnichsen et al., 2002b].”