Diffusion of Au(CH3S)2 on Au(111) Observed with the Scanning Tunneling Microscope

Holmes, Scott; Palmer, Richard; Guo, Quanmin

doi:10.1021/acs.jpcc.9b06852

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Diffusion of Au(CH3S)2 on Au(111) Observed with the Scanning Tunneling Microscope

Scott Holmes, Richard Palmer

, Quanmin Guo

The Journal of Physical Chemistry C, Volume: 123, Issue: 39, Pages: 24104 - 24110

Swansea University Author: Richard Palmer

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DOI (Published version): 10.1021/acs.jpcc.9b06852

Abstract

The diffusion of a three-legged molecule, CH3S–Au–SCH3, on Au(111) has been investigated using scanning tunneling microscopy. Each of the two S atoms forms a bond with a Au atom in the Au(111) substrate. The Au atom in the molecule provides the third anchoring point via its interaction with Au(111)....

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Published in:	The Journal of Physical Chemistry C
ISSN:	1932-7447 1932-7455
Published:	2019
Online Access:	Check full text
URI:	https://cronfa.swan.ac.uk/Record/cronfa52512
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first_indexed	2019-10-18T14:24:01Z
last_indexed	2019-10-18T20:23:21Z
id	cronfa52512
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spelling	2019-10-18T15:37:03.2077839 v2 52512 2019-10-18 Diffusion of Au(CH3S)2 on Au(111) Observed with the Scanning Tunneling Microscope 6ae369618efc7424d9774377536ea519 0000-0001-8728-8083 Richard Palmer Richard Palmer true false 2019-10-18 MECH The diffusion of a three-legged molecule, CH3S–Au–SCH3, on Au(111) has been investigated using scanning tunneling microscopy. Each of the two S atoms forms a bond with a Au atom in the Au(111) substrate. The Au atom in the molecule provides the third anchoring point via its interaction with Au(111). CH3S–Au–SCH3 hops as a single unit without breaking any of the S–Au bonds within the molecule at temperatures below 170 K, with an activation energy of 66 meV. The CH3S–Au–SCH3 molecules have a tendency to aggregate into rows driven by an attractive potential between neighboring molecules, with the minimum row consisting of just two molecules in the form of a dimer. The dimer is much less mobile than a single molecule due to the attractive potential between the two molecules. The dimer is observed apparently to hop as a single unit with an activation energy of 210 meV. Detachment of a CH3S–Au–SCH3 molecule from the end of a row consisting of three or more molecules takes place with an activation energy of 320 meV. Journal Article The Journal of Physical Chemistry C 123 39 24104 24110 1932-7447 1932-7455 3 10 2019 2019-10-03 10.1021/acs.jpcc.9b06852 COLLEGE NANME Mechanical Engineering COLLEGE CODE MECH Swansea University 2019-10-18T15:37:03.2077839 2019-10-18T13:40:33.5387474 Faculty of Science and Engineering School of Aerospace, Civil, Electrical, General and Mechanical Engineering - Mechanical Engineering Scott Holmes 1 Richard Palmer 0000-0001-8728-8083 2 Quanmin Guo 3 0052512-18102019153650.pdf holmes2019.pdf 2019-10-18T15:36:50.4470000 Output 1470203 application/pdf Accepted Manuscript true 2020-09-12T00:00:00.0000000 true eng
title	Diffusion of Au(CH3S)2 on Au(111) Observed with the Scanning Tunneling Microscope
spellingShingle	Diffusion of Au(CH3S)2 on Au(111) Observed with the Scanning Tunneling Microscope Richard Palmer
title_short	Diffusion of Au(CH3S)2 on Au(111) Observed with the Scanning Tunneling Microscope
title_full	Diffusion of Au(CH3S)2 on Au(111) Observed with the Scanning Tunneling Microscope
title_fullStr	Diffusion of Au(CH3S)2 on Au(111) Observed with the Scanning Tunneling Microscope
title_full_unstemmed	Diffusion of Au(CH3S)2 on Au(111) Observed with the Scanning Tunneling Microscope
title_sort	Diffusion of Au(CH3S)2 on Au(111) Observed with the Scanning Tunneling Microscope
author_id_str_mv	6ae369618efc7424d9774377536ea519
author_id_fullname_str_mv	6ae369618efc7424d9774377536ea519_***_Richard Palmer
author	Richard Palmer
author2	Scott Holmes Richard Palmer Quanmin Guo
format	Journal article
container_title	The Journal of Physical Chemistry C
container_volume	123
container_issue	39
container_start_page	24104
publishDate	2019
institution	Swansea University
issn	1932-7447 1932-7455
doi_str_mv	10.1021/acs.jpcc.9b06852
college_str	Faculty of Science and Engineering
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hierarchy_top_id	facultyofscienceandengineering
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department_str	School of Aerospace, Civil, Electrical, General and Mechanical Engineering - Mechanical Engineering{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Aerospace, Civil, Electrical, General and Mechanical Engineering - Mechanical Engineering
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description	The diffusion of a three-legged molecule, CH3S–Au–SCH3, on Au(111) has been investigated using scanning tunneling microscopy. Each of the two S atoms forms a bond with a Au atom in the Au(111) substrate. The Au atom in the molecule provides the third anchoring point via its interaction with Au(111). CH3S–Au–SCH3 hops as a single unit without breaking any of the S–Au bonds within the molecule at temperatures below 170 K, with an activation energy of 66 meV. The CH3S–Au–SCH3 molecules have a tendency to aggregate into rows driven by an attractive potential between neighboring molecules, with the minimum row consisting of just two molecules in the form of a dimer. The dimer is much less mobile than a single molecule due to the attractive potential between the two molecules. The dimer is observed apparently to hop as a single unit with an activation energy of 210 meV. Detachment of a CH3S–Au–SCH3 molecule from the end of a row consisting of three or more molecules takes place with an activation energy of 320 meV.
published_date	2019-10-03T04:04:56Z
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score	11.037056

Diffusion of Au(CH3S)2 on Au(111) Observed with the Scanning Tunneling Microscope

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