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 |
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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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