Reactive ion scattering from pure and mixed HCl, NH3 and D2O surfaces

Park, Seong-Chan ; Maeng, Kye-Won ; Pradeep, T. ; Kang, H. (2001) Reactive ion scattering from pure and mixed HCl, NH3 and D2O surfaces Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions With Materials and Atoms, 182 (1-4). pp. 193-199. ISSN 0168-583X

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Official URL: http://linkinghub.elsevier.com/retrieve/pii/S01685...

Related URL: http://dx.doi.org/10.1016/S0168-583X(01)00675-9

Abstract

We have sampled the various species present on the condensed molecular layers of HCl, NH3,D2O and their mixtures by Cs+ reactive ion scattering (RIS) and low-energy sputtering. HCl and NH3 exist in molecular states on pure molecular films, but the ammonium ion (NH4+) is readily formed when HCl and NH3 are co-deposited, by proton transfer from HCl to NH3. Water is unnecessary for the proton transfer, although enhances it. In the presence of water, HCl ionizes first to form the hydronium ion (H3O+), which subsequently transfers the proton to NH3 to form NH4+. This work demonstrates the capability of RIS for probing chemical species on condensed molecular surfaces and monitoring their reactions.

Item Type:Article
Source:Copyright of this article belongs to Elsevier Science.
Keywords:Low-energy Ion Scattering; Ice; Ammonia; Hydrogen Chloride; Cesium; Ruthenium
ID Code:27455
Deposited On:10 Dec 2010 12:19
Last Modified:17 May 2016 10:40

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