Emission of ionic water clusters from water ice films bombarded by energetic projectiles

Igor A. Wojciechowski, Uchkun Kutliev, Shixin Sun, Christopher Szakal, Nicholas Winograd, Barbara Jane Garrison

Research output: Contribution to journalArticle

17 Citations (Scopus)

Abstract

Emission of water clusters M ± (H 2 O) n , where M ± denotes positive alkali metal ions, Li + , Na + , Cs + or negative halogen ions, Cl - , Br - , I - from ice films frozen on metal substrates bombarded by energetic particles was studied by a molecular dynamics (MD) technique and by ToF-secondary ion mass spectrometry (SIMS) experiments. In the experiment, different concentrations of the salts NaCl, NaBr, and NaI were dissolved in water before freezing. The influence of ion charge and concentration on ion signal was investigated. Due to the different solvation structures of cations and anions in water, cationic clusters were demonstrated to eject more effectively than anionic clusters in both the simulations and experiments. The dependence of the absolute ion yield on the salt concentration is discussed in terms of ion pairing and clustering in the original solution and during emission.

Original languageEnglish (US)
Pages (from-to)72-77
Number of pages6
JournalApplied Surface Science
Volume231-232
DOIs
StatePublished - Jun 15 2004

Fingerprint

Ice
Projectiles
Ions
Water
Salts
Alkali Metals
Halogens
Experiments
Solvation
Alkali metals
Secondary ion mass spectrometry
Freezing
Anions
Metal ions
Molecular dynamics
Cations
Negative ions
Positive ions
Metals
Hydrogen

All Science Journal Classification (ASJC) codes

  • Surfaces, Coatings and Films

Cite this

Wojciechowski, Igor A. ; Kutliev, Uchkun ; Sun, Shixin ; Szakal, Christopher ; Winograd, Nicholas ; Garrison, Barbara Jane. / Emission of ionic water clusters from water ice films bombarded by energetic projectiles. In: Applied Surface Science. 2004 ; Vol. 231-232. pp. 72-77.
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abstract = "Emission of water clusters M ± (H 2 O) n , where M ± denotes positive alkali metal ions, Li + , Na + , Cs + or negative halogen ions, Cl - , Br - , I - from ice films frozen on metal substrates bombarded by energetic particles was studied by a molecular dynamics (MD) technique and by ToF-secondary ion mass spectrometry (SIMS) experiments. In the experiment, different concentrations of the salts NaCl, NaBr, and NaI were dissolved in water before freezing. The influence of ion charge and concentration on ion signal was investigated. Due to the different solvation structures of cations and anions in water, cationic clusters were demonstrated to eject more effectively than anionic clusters in both the simulations and experiments. The dependence of the absolute ion yield on the salt concentration is discussed in terms of ion pairing and clustering in the original solution and during emission.",
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Emission of ionic water clusters from water ice films bombarded by energetic projectiles. / Wojciechowski, Igor A.; Kutliev, Uchkun; Sun, Shixin; Szakal, Christopher; Winograd, Nicholas; Garrison, Barbara Jane.

In: Applied Surface Science, Vol. 231-232, 15.06.2004, p. 72-77.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Emission of ionic water clusters from water ice films bombarded by energetic projectiles

AU - Wojciechowski, Igor A.

AU - Kutliev, Uchkun

AU - Sun, Shixin

AU - Szakal, Christopher

AU - Winograd, Nicholas

AU - Garrison, Barbara Jane

PY - 2004/6/15

Y1 - 2004/6/15

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AB - Emission of water clusters M ± (H 2 O) n , where M ± denotes positive alkali metal ions, Li + , Na + , Cs + or negative halogen ions, Cl - , Br - , I - from ice films frozen on metal substrates bombarded by energetic particles was studied by a molecular dynamics (MD) technique and by ToF-secondary ion mass spectrometry (SIMS) experiments. In the experiment, different concentrations of the salts NaCl, NaBr, and NaI were dissolved in water before freezing. The influence of ion charge and concentration on ion signal was investigated. Due to the different solvation structures of cations and anions in water, cationic clusters were demonstrated to eject more effectively than anionic clusters in both the simulations and experiments. The dependence of the absolute ion yield on the salt concentration is discussed in terms of ion pairing and clustering in the original solution and during emission.

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