A size resolved investigation of large water clusters
2014 | journal article. A publication with affiliation to the University of Göttingen.
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- Authors
- Buck, Udo; Pradzynski, Christoph C.; Zeuch, Thomas; Dieterich, Johannes M.; Hartke, Bernd
- 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.
- Issue Date
- 2014
- Status
- published
- Publisher
- Royal Soc Chemistry
- Journal
- Physical Chemistry Chemical Physics
- ISSN
- 1463-9084; 1463-9076
- Sponsor
- Deutsche Forschungsgemeinschaft [ZE 890 1-1, 2, GRK 782]