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Diffusion of Au(CH3S)2 on Au(111) Observed with the Scanning Tunneling Microscope
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)....
Published in: | The Journal of Physical Chemistry C |
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ISSN: | 1932-7447 1932-7455 |
Published: |
2019
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URI: | https://cronfa.swan.ac.uk/Record/cronfa52512 |
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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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facultyofscienceandengineering |
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Faculty of Science and Engineering |
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facultyofscienceandengineering |
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Faculty of Science and Engineering |
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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1763753377056948224 |
score |
11.021648 |