A size resolved investigation of large water clusters

Buck, Udo, Pradzynski, Christoph C., Zeuch, Thomas, Dieterich, Johannes M. and Hartke, Bernd (2014) A size resolved investigation of large water clusters Physical Chemistry Chemical Physics, 16 (15). pp. 6859-6871.

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Abstract

Size selected water clusters are generated by photoionizing sodium doped clusters close to the ionization threshold. This procedure is free of fragmentation. Upon infrared excitation, size- and isomer-specific OH-stretch spectra are obtained over a large range of cluster sizes. In one application of this method the infrared spectra of single water cluster sizes are investigated. A comparison with calculations, based on structures optimized by genetic algorithms, has been made to tentatively derive cluster structures which reproduce the experimental spectra. We identified a single all-surface structure for n = 25 and mixtures with one or two interior molecules for n = 24 and 32. In another application the sizes are determined at which the crystallization sets in. Surprisingly, this process strongly depends on the cluster temperature. The crystallization starts at sizes below n = 200 at higher temperatures and the onset is shifted to sizes above n = 400 at lower temperatures.

Document Type: Article
Research affiliation: Kiel University > Kiel Marine Science
OceanRep > The Future Ocean - Cluster of Excellence
Kiel University
Refereed: Yes
ISSN: 1463-9076
Projects: Future Ocean
Date Deposited: 30 Mar 2015 12:02
Last Modified: 10 Apr 2018 10:14
URI: http://eprints.uni-kiel.de/id/eprint/27224

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