Details

Autor(en) / Beteiligte

• Liaw, Jiunn-Woei
• Cheng, Jui-Ching
• Ma, Cuiman
• Zhang, Ruifeng

Titel

Theoretical Analysis of Plasmon Modes of Au–Ag Nanocages

Ist Teil von

• Journal of physical chemistry. C, 2013-09, Vol.117 (38), p.19586-19592

Ort / Verlag

Columbus, OH: American Chemical Society

Erscheinungsjahr

2013

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• The plasmonic properties of porous Au–Ag alloy nanocages are studied theoretically. The finite element method is used to investigate numerically the scattering and absorption spectra of two kinds of nanocages: corner-truncated and face-holed nanocages. Our results indicate that the plasmon modes of the two porous nanocages are nearly equivalent and tunable, which are redshifted from that of nanobox. The larger the surface porosity, the more redshifted the plasmon band is. However, the dependence of the plasmon band (dipole mode) on the surface porosity of the corner-truncated nanocage is higher than that of the face-holed one. The absorption efficiency of the former is higher than those of the latter at the same plasmon mode, whereas the scattering efficiency of the former is weaker. In addition, the bandwidth of the former is narrower than that of the latter. Our results also show that the scattering and absorption efficiencies of a corner-truncated nanocage illuminated by a plane wave normal to the {111} facet are stronger than those to the {100} facet at the same plasmon mode.