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Title: Core-shell effects in the ionization of doped helium nanodroplets
Authors: Liu, Jun
Shepperson, Benjamin
Ellis, Andrew M.
Yang, Shengfu
First Published: 18-May-2011
Publisher: Royal Society of Chemistry
Citation: Physical Chemistry Chemical Physics, 2011, 13, pp. 13920-13925
Abstract: Core-shell particles with water clusters as the core and surrounded by an atomic or molecular shell have been synthesized for the first time by adding water and a co-dopant sequentially to helium nanodroplets. The co-dopants chosen for investigation were Ar, O[subscript 2], N[subcript 2], CO, CO[subscript 2], NO and C[subscript 6]D[subscript 6]. These co-dopants have been used to investigate the effect of an outer shell on the ionization of the core material by charge transfer in helium nanodroplets. The specific aim was to determine how the identity of the shell material affects the fragmentation of water cluster ions, i.e. whether it helps to stabilize parent ion ((H[subscript 2]O)[subscript n][superscript +]) formation or increases fragmentation (to form (H[subscript 2]O)[subscript n]H[superscript +])). N[subscript 2], O[subscript 2], CO[subscript 2] and C[subscript 6]D[subscript 6] all show a marked softening effect, which is consistent with the formation of a protective shell around the water cluster core. For CO and NO co-dopants, the response is complicated by secondary reactions which actually favour water cluster ion fragmentation for some water cluster sizes.
DOI Link: 10.1039/c1cp20653b
ISSN: 1463-9076
eISSN: 1463-9084
Version: Publisher Version
Status: Peer-reviewed
Type: Journal Article
Rights: Copyright © 2011, Royal Society of Chemistry. Deposited with reference to the publisher’s archiving policy available on the SHERPA/RoMEO website.
Appears in Collections:Published Articles, Dept. of Chemistry

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