Structure and optical properties of core-shell bimetallic AgnNin clusters: Comparison with pure silver and nickel clusters
J. Chem. Phys. 131, 174302 (2009); doi:10.1063/1.3257900
Published 2 November 2009
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We present the structural, electronic, and optical properties of bimetallic AgnNin (n
7) clusters investigated in the framework of the density functional theory (DFT) (DFT and time-dependent DFT). The structure of AgnNin clusters is found to be governed essentially by the formation of a Ni-core surrounded by silver atoms. The cohesive energies and the ionization potentials are calculated. The UV-visible absorption spectra of bimetallic clusters are compared to those of pure silver and nickel clusters. An interpretation of spectroscopic patterns in terms of contribution from s- and d-type excitations is also given. In particular the d electrons of nickel atoms are found to play a crucial role in the optical transitions in Ni-rich systems.
©2009 American Institute of Physics
7) clusters investigated in the framework of the density functional theory (DFT) (DFT and time-dependent DFT). The structure of AgnNin clusters is found to be governed essentially by the formation of a Ni-core surrounded by silver atoms. The cohesive energies and the ionization potentials are calculated. The UV-visible absorption spectra of bimetallic clusters are compared to those of pure silver and nickel clusters. An interpretation of spectroscopic patterns in terms of contribution from s- and d-type excitations is also given. In particular the d electrons of nickel atoms are found to play a crucial role in the optical transitions in Ni-rich systems.
©2009 American Institute of Physics
| History: | Received 29 June 2009; accepted 12 October 2009; published 2 November 2009 |
| Permalink: |
http://link.aip.org/link/?JCPSA6/131/174302/1 |
KEYWORDS and PACS
density functional theory,
electronic structure,
ionisation potential,
metal clusters,
nanostructured materials,
nickel alloys,
silver alloys,
ultraviolet spectra,
visible spectra
- 78.67.Bf
Optical properties of nanocrystals and nanoparticles - 78.40.Kc
Visible and ultraviolet spectra of metals, semimetals, and alloys - 71.15.Mb
Density functional theory, local density approximation, gradient and other corrections (condensed matter electronic structure) - 61.46.Bc
Structure of clusters (nanoscale materials) - 73.22.-f
Electronic structure of nanoscale materials - YEAR: 2009
PUBLICATION DATA
0021-9606 (print)
1089-7690 (online)
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