Journal
MATERIALS SCIENCE & ENGINEERING C-BIOMIMETIC AND SUPRAMOLECULAR SYSTEMS
Volume 23, Issue 6-8, Pages 965-970Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.msec.2003.09.128
Keywords
nanoparticle; core-shell bimetallic aggregates; theoretical
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The dependence of linear optical response proper-ties of bimetallic core-shell spherical nanoparticles is investigated as a function of size and relative composition. Two kinds of schematic models have been tested for describing the dielectric behavior of bimetallic particles and the related linear electromagnetic response: (i) Drude model, in conjunction with bulk dielectric data relative to the pure metals, in the assumption of a simple combination law; (ii) DFT-based approach to the dynamic polarizability of a binary particle, with the nature of the metals involved taken into account through their Wigner-Seitz radius. (C) 2003 Elsevier B.V. All rights reserved.
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