Open AccessStudy on the localized surface plasmon resonance properties of bimetallic gold and silver three-layered nanotubes
Author(s) -
Cong Chao,
DaJian Wu,
Xiaojun Liu,
Bo Li
Publication year - 2012
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.61.037301
Subject(s) - surface plasmon resonance , materials science , bimetallic strip , plasmon , shell (structure) , localized surface plasmon , surface plasmon , resonance (particle physics) , blueshift , finite difference time domain method , nanotechnology , molecular physics , optoelectronics , metal , nanoparticle , optics , atomic physics , composite material , chemistry , physics , metallurgy , photoluminescence
The localized surface plasmon resonance (LSPR) properties of bimetallic gold and silver three-layered nanotubes such as SiO2-Ag-Au and SiO2-Au-Ag nanotubes have been investigated with the variations of Au or Ag shell thickness and size of the core by means of Finite Difference Time Domain (FDTD) method. With increase in the core size, it is found that the LSPR peaks show red-shift. We also observe with increasing the thickness of the Au or Ag shell that the LSPR peaks show blue-shift. Furthermore, the modulation of LSPR due to Ag shell is more significant compared with that due to Au shell. We have ascribed the variations of the LSPR peaks to the plasmon hybridization and the competition between the changes of conduction and oscillation electrons.