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Vibrational excitation of adsorbed molecules by low-energy photon-emitted electrons: A dynamical model

A. González Ureña, H.H Telle, J Tornero, Helmut Telle

Journal of Molecular Structure, Volume: 1031

Swansea University Author: Helmut Telle

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DOI (Published version): 10.1016/j.molstruc.2012.07.032

Abstract

A simple, inelastic electron-scattering dynamical model is presented to account for vibrational excitation in molecular adsorbates. The basic two ingredients of the theoretical model are: (i) the conservation of the total angular momentum, and (ii) the requirement of a critical time to allow for the...

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Published in: Journal of Molecular Structure
ISSN: 0022-2860
Published: 2013
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URI: https://cronfa.swan.ac.uk/Record/cronfa14490
first_indexed 2013-07-23T12:12:19Z
last_indexed 2019-06-13T19:20:37Z
id cronfa14490
recordtype SURis
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spelling 2019-06-13T17:59:51.9740482 v2 14490 2013-03-27 Vibrational excitation of adsorbed molecules by low-energy photon-emitted electrons: A dynamical model 7f645d598f0afb573309bc5f86ea46fa Helmut Telle Helmut Telle true false 2013-03-27 A simple, inelastic electron-scattering dynamical model is presented to account for vibrational excitation in molecular adsorbates. The basic two ingredients of the theoretical model are: (i) the conservation of the total angular momentum, and (ii) the requirement of a critical time to allow for the intra-molecular energy re-arrangement of the transient negative-ion complex. The model is applied to the vibrational excitation dynamics of molecules chemisorbed at sub-monolayer conditions on ordered metal surfaces. This was exemplified for Acrylonitrile adsorbed on Cu(100), whose vibrational excitation was studied via energy loss spectra of low-energy two-photon photoemission (2PPE) electrons, and for ammonia (NH3 and ND3) adsorbed on Cu(100), being probed in a STM experiment. Fits of the model to the data allowed for deducing the energy threshold of the vibrational excitation of the C=C and C-(triple-bond)-N bonds of the ACN adsorbate molecules, and the threshold for the symmetric nu1-stretch mode excitation of adsorbed NH3/ND3. Also, information about the temporal dynamics underlying the inelastic electron scattering was gained. Journal Article Journal of Molecular Structure 1031 69 0022-2860 16 1 2013 2013-01-16 10.1016/j.molstruc.2012.07.032 COLLEGE NANME COLLEGE CODE Swansea University 2019-06-13T17:59:51.9740482 2013-03-27T12:22:40.7550160 Faculty of Science and Engineering School of Biosciences, Geography and Physics - Physics A. González Ureña 1 H.H Telle 2 J Tornero 3 Helmut Telle 4
title Vibrational excitation of adsorbed molecules by low-energy photon-emitted electrons: A dynamical model
spellingShingle Vibrational excitation of adsorbed molecules by low-energy photon-emitted electrons: A dynamical model
Helmut Telle
title_short Vibrational excitation of adsorbed molecules by low-energy photon-emitted electrons: A dynamical model
title_full Vibrational excitation of adsorbed molecules by low-energy photon-emitted electrons: A dynamical model
title_fullStr Vibrational excitation of adsorbed molecules by low-energy photon-emitted electrons: A dynamical model
title_full_unstemmed Vibrational excitation of adsorbed molecules by low-energy photon-emitted electrons: A dynamical model
title_sort Vibrational excitation of adsorbed molecules by low-energy photon-emitted electrons: A dynamical model
author_id_str_mv 7f645d598f0afb573309bc5f86ea46fa
author_id_fullname_str_mv 7f645d598f0afb573309bc5f86ea46fa_***_Helmut Telle
author Helmut Telle
author2 A. González Ureña
H.H Telle
J Tornero
Helmut Telle
format Journal article
container_title Journal of Molecular Structure
container_volume 1031
publishDate 2013
institution Swansea University
issn 0022-2860
doi_str_mv 10.1016/j.molstruc.2012.07.032
college_str Faculty of Science and Engineering
hierarchytype
hierarchy_top_id facultyofscienceandengineering
hierarchy_top_title Faculty of Science and Engineering
hierarchy_parent_id facultyofscienceandengineering
hierarchy_parent_title Faculty of Science and Engineering
department_str School of Biosciences, Geography and Physics - Physics{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Biosciences, Geography and Physics - Physics
document_store_str 0
active_str 0
description A simple, inelastic electron-scattering dynamical model is presented to account for vibrational excitation in molecular adsorbates. The basic two ingredients of the theoretical model are: (i) the conservation of the total angular momentum, and (ii) the requirement of a critical time to allow for the intra-molecular energy re-arrangement of the transient negative-ion complex. The model is applied to the vibrational excitation dynamics of molecules chemisorbed at sub-monolayer conditions on ordered metal surfaces. This was exemplified for Acrylonitrile adsorbed on Cu(100), whose vibrational excitation was studied via energy loss spectra of low-energy two-photon photoemission (2PPE) electrons, and for ammonia (NH3 and ND3) adsorbed on Cu(100), being probed in a STM experiment. Fits of the model to the data allowed for deducing the energy threshold of the vibrational excitation of the C=C and C-(triple-bond)-N bonds of the ACN adsorbate molecules, and the threshold for the symmetric nu1-stretch mode excitation of adsorbed NH3/ND3. Also, information about the temporal dynamics underlying the inelastic electron scattering was gained.
published_date 2013-01-16T03:24:41Z
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score 11.089718

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