Title: Gas-phase structures of neutral silicon clusters
Authors: Haertelt, Marko ×
Lyon, Jonathan T
Claes, Pieterjan
de Haeck, Jorg
Lievens, Peter
Fielicke, Andre #
Issue Date: Feb-2012
Publisher: American Institute of Physics
Series Title: Journal of Chemical Physics vol:136 issue:6 pages:-
Article number: 064301
Abstract: Vibrational spectra of neutral silicon clusters Si-n, in the size range of n = 6-10 and for n = 15, have been measured in the gas phase by two fundamentally different IR spectroscopic methods. Silicon clusters composed of 8, 9, and 15 atoms have been studied by IR multiple photon dissociation spectroscopy of a cluster-xenon complex, while clusters containing 6, 7, 9, and 10 atoms have been studied by a tunable IR-UV two-color ionization scheme. Comparison of both methods is possible for the Si-9 cluster. By using density functional theory, an identification of the experimentally observed neutral cluster structures is possible, and the effect of charge on the structure of neutrals and cations, which have been previously studied via IR multiple photon dissociation, can be investigated. Whereas the structures of small clusters are based on bipyramidal motifs, a trigonal prism as central unit is found in larger clusters. Bond weakening due to the loss of an electron leads to a major structural change between neutral and cationic Si-8. (C) 2012 American Institute of Physics. [doi:10.1063/1.3682323]
ISSN: 0021-9606
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Solid State Physics and Magnetism Section
× corresponding author
# (joint) last author

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