Irregular Shapes of Water Clusters Generated in Supersonic Expansions

0427157 - ÚFCH JH 2015 RIV US eng J - Journal Article
Lengyel, Jozef - Pysanenko, Andriy - Poterya, Viktoriya - Slavíček, Petr - Fárník, Michal - Kočišek, J. - Fedor, J.
Irregular Shapes of Water Clusters Generated in Supersonic Expansions.
Physical Review Letters. Roč. 112, č. 11 (2014), s. 113401. ISSN 0031-9007. E-ISSN 1079-7114
R&D Projects: GA ČR GAP208/11/0161; GA ČR GA14-08937S
Institutional support: RVO:61388955
Keywords : Argon clusters * Guest molecules * Interaction potentials
Subject RIV: CF - Physical ; Theoretical Chemistry
Impact factor: 7.512, year: 2014

We report cross sections for pickup of guest molecules on neutral argon and water clusters with the mean sizes in the range from N¯ ¼ 50 to 600. The experiments are supported by molecular dynamics simulations and analytical models based on the interaction potentials. The cross sections for argon clusters are consistent with their assumed spherical shape and follow approximately the theoretically justified N1=3 dependence. On the other hand, the cross sections of water clusters depart from this dependence and are considerably larger starting from N¯ ≥ 300. We interpret this increase of cross section by the occurrence of highly irregular shapes of water clusters produced in the supersonic expansion of water vapor under the conditions of the large cluster generation.
Permanent Link: http://hdl.handle.net/11104/0232797