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Temperature dependent stereodynamics in surface scattering measured through subtle changes in the molecular wave function

Helen Chadwick Orcid Logo, Gil Alexandrowicz Orcid Logo

Faraday Discussions

Swansea University Authors: Helen Chadwick Orcid Logo, Gil Alexandrowicz Orcid Logo

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DOI (Published version): 10.1039/d4fd00007b

Abstract

A magnetically manipulated molecular beam technique is used to change the rotational orientation of H2 molecules which collide with a stepped Cu(511) surface and explore how the polarisation dependence of molecules scattering into the specular channel changes as a function of surface temperature. At...

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Published in: Faraday Discussions
ISSN: 1359-6640 1364-5498
Published: Royal Society of Chemistry (RSC) 2024
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URI: https://cronfa.swan.ac.uk/Record/cronfa65800
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first_indexed 2024-03-08T10:40:30Z
last_indexed 2024-03-08T10:40:30Z
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spelling v2 65800 2024-03-08 Temperature dependent stereodynamics in surface scattering measured through subtle changes in the molecular wave function 8ff1942a68a875f00d473d51aa4947a1 0000-0003-4119-6903 Helen Chadwick Helen Chadwick true false 1401818466c1114ae2035b811568a38e 0000-0003-3203-5577 Gil Alexandrowicz Gil Alexandrowicz true false 2024-03-08 EAAS A magnetically manipulated molecular beam technique is used to change the rotational orientation of H2 molecules which collide with a stepped Cu(511) surface and explore how the polarisation dependence of molecules scattering into the specular channel changes as a function of surface temperature. At all temperatures, H2 molecules that are rotating like cartwheels are more likely to be scattered into the specular channel than those that are rotating like helicopters. Furthermore, the scattered molecules are more likely to be rotating like cartwheels, regardless of their state before the collision. Increasing the temperature of the Cu(511) surface causes the polarisation effects to become stronger, with the scattering becoming more selective for H2 with cartwheel like rotation. Therefore, scattering a molecular beam of H2 from a Cu(511) surface and taking the molecules scattered into the specular channel provides a method to create a rotationally polarised beam of H2, where the polarisation can be tuned by changing the surface temperature. In contrast, the rotational orientation dependence observed for specular scattering from a flat Cu(111) surface is independent of surface temperature within the same temperature range. Journal Article Faraday Discussions 0 Royal Society of Chemistry (RSC) 1359-6640 1364-5498 14 2 2024 2024-02-14 10.1039/d4fd00007b COLLEGE NANME Engineering and Applied Sciences School COLLEGE CODE EAAS Swansea University SU Library paid the OA fee (TA Institutional Deal) ERC consolidator grant (Horizon 2020 Research and Innovation Programme Grant Number 772228) EPSRC New Horizons grant (EP/V048589/1) EPSRC standard grant (EP/X037886/1) Support from the Supercomputing Wales project, which is part-funded by the European Regional Development Fund (ERDF) via Welsh Government. 2024-07-03T10:14:26.7896991 2024-03-08T10:31:38.5231508 Faculty of Science and Engineering School of Engineering and Applied Sciences - Chemistry Helen Chadwick 0000-0003-4119-6903 1 Gil Alexandrowicz 0000-0003-3203-5577 2 65800__30762__dfff7daee99642958f43de49f8c27f10.pdf 65800.VoR.pdf 2024-06-26T16:37:03.1832131 Output 745178 application/pdf Version of Record true This article is licensed under a Creative Commons Attribution 3.0 Unported Licence. true eng http://creativecommons.org/licenses/by/3.0/
title Temperature dependent stereodynamics in surface scattering measured through subtle changes in the molecular wave function
spellingShingle Temperature dependent stereodynamics in surface scattering measured through subtle changes in the molecular wave function
Helen Chadwick
Gil Alexandrowicz
title_short Temperature dependent stereodynamics in surface scattering measured through subtle changes in the molecular wave function
title_full Temperature dependent stereodynamics in surface scattering measured through subtle changes in the molecular wave function
title_fullStr Temperature dependent stereodynamics in surface scattering measured through subtle changes in the molecular wave function
title_full_unstemmed Temperature dependent stereodynamics in surface scattering measured through subtle changes in the molecular wave function
title_sort Temperature dependent stereodynamics in surface scattering measured through subtle changes in the molecular wave function
author_id_str_mv 8ff1942a68a875f00d473d51aa4947a1
1401818466c1114ae2035b811568a38e
author_id_fullname_str_mv 8ff1942a68a875f00d473d51aa4947a1_***_Helen Chadwick
1401818466c1114ae2035b811568a38e_***_Gil Alexandrowicz
author Helen Chadwick
Gil Alexandrowicz
author2 Helen Chadwick
Gil Alexandrowicz
format Journal article
container_title Faraday Discussions
container_volume 0
publishDate 2024
institution Swansea University
issn 1359-6640
1364-5498
doi_str_mv 10.1039/d4fd00007b
publisher Royal Society of Chemistry (RSC)
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 Engineering and Applied Sciences - Chemistry{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Engineering and Applied Sciences - Chemistry
document_store_str 1
active_str 0
description A magnetically manipulated molecular beam technique is used to change the rotational orientation of H2 molecules which collide with a stepped Cu(511) surface and explore how the polarisation dependence of molecules scattering into the specular channel changes as a function of surface temperature. At all temperatures, H2 molecules that are rotating like cartwheels are more likely to be scattered into the specular channel than those that are rotating like helicopters. Furthermore, the scattered molecules are more likely to be rotating like cartwheels, regardless of their state before the collision. Increasing the temperature of the Cu(511) surface causes the polarisation effects to become stronger, with the scattering becoming more selective for H2 with cartwheel like rotation. Therefore, scattering a molecular beam of H2 from a Cu(511) surface and taking the molecules scattered into the specular channel provides a method to create a rotationally polarised beam of H2, where the polarisation can be tuned by changing the surface temperature. In contrast, the rotational orientation dependence observed for specular scattering from a flat Cu(111) surface is independent of surface temperature within the same temperature range.
published_date 2024-02-14T10:14:26Z
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score 11.014537

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