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Experimental determination of the energy difference between competing isomers of deposited, size-selected gold nanoclusters
Nature Communications, Volume: 9, Issue: 1
Swansea University Author:
Richard Palmer
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DOI (Published version): 10.1038/s41467-018-03794-9
Abstract
The equilibrium structures and dynamics of a nanoscale system are regulated by a complex potential energy surface (PES). This is a key target of theoretical calculations but experimentally elusive. We report the measurement of a key PES parameter for a model nanosystem: size-selected Au nanoclusters...
Published in: | Nature Communications |
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ISSN: | 2041-1723 2041-1723 |
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2018
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URI: | https://cronfa.swan.ac.uk/Record/cronfa39327 |
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2021-01-14T12:59:35.4253447 v2 39327 2018-04-06 Experimental determination of the energy difference between competing isomers of deposited, size-selected gold nanoclusters 6ae369618efc7424d9774377536ea519 0000-0001-8728-8083 Richard Palmer Richard Palmer true false 2018-04-06 MECH The equilibrium structures and dynamics of a nanoscale system are regulated by a complex potential energy surface (PES). This is a key target of theoretical calculations but experimentally elusive. We report the measurement of a key PES parameter for a model nanosystem: size-selected Au nanoclusters, soft-landed on amorphous silicon nitride supports. We obtain the energy difference between the most abundant structural isomers of magic number Au561 clusters, the decahedron and face-centred-cubic (fcc) structures, from the equilibrium proportions of the isomers. These are measured by atomic-resolution scanning transmission electron microscopy, with an ultra-stable heating stage, as a function of temperature (125–500 °C). At lower temperatures (20–125 °C) the behaviour is kinetic, exhibiting down conversion of metastable decahedra into fcc structures; the higher state is repopulated at higher temperatures in equilibrium. We find the decahedron is 0.040 ± 0.020 eV higher in energy than the fcc isomer, providing a benchmark for the theoretical treatment of nanoparticles. Journal Article Nature Communications 9 1 2041-1723 2041-1723 3 4 2018 2018-04-03 10.1038/s41467-018-03794-9 COLLEGE NANME Mechanical Engineering COLLEGE CODE MECH Swansea University EPSRC, EP/K006061/2 UKRI, (EP/K006061. 2021-01-14T12:59:35.4253447 2018-04-06T12:04:08.1169404 Faculty of Science and Engineering School of Aerospace, Civil, Electrical, General and Mechanical Engineering - Mechanical Engineering D. M. Foster 1 R. Ferrando 2 Richard Palmer 0000-0001-8728-8083 3 0039327-06042018120446.pdf Palmer.s41467-018-03794-9.pdf 2018-04-06T12:04:46.1500000 Output 1467887 application/pdf Version of Record true 2018-04-06T00:00:00.0000000 Distributed under a Creative Commons Attribution 4.0 International License. true eng http://creativecommons.org/licenses/by/4.0/ |
title |
Experimental determination of the energy difference between competing isomers of deposited, size-selected gold nanoclusters |
spellingShingle |
Experimental determination of the energy difference between competing isomers of deposited, size-selected gold nanoclusters Richard Palmer |
title_short |
Experimental determination of the energy difference between competing isomers of deposited, size-selected gold nanoclusters |
title_full |
Experimental determination of the energy difference between competing isomers of deposited, size-selected gold nanoclusters |
title_fullStr |
Experimental determination of the energy difference between competing isomers of deposited, size-selected gold nanoclusters |
title_full_unstemmed |
Experimental determination of the energy difference between competing isomers of deposited, size-selected gold nanoclusters |
title_sort |
Experimental determination of the energy difference between competing isomers of deposited, size-selected gold nanoclusters |
author_id_str_mv |
6ae369618efc7424d9774377536ea519 |
author_id_fullname_str_mv |
6ae369618efc7424d9774377536ea519_***_Richard Palmer |
author |
Richard Palmer |
author2 |
D. M. Foster R. Ferrando Richard Palmer |
format |
Journal article |
container_title |
Nature Communications |
container_volume |
9 |
container_issue |
1 |
publishDate |
2018 |
institution |
Swansea University |
issn |
2041-1723 2041-1723 |
doi_str_mv |
10.1038/s41467-018-03794-9 |
college_str |
Faculty of Science and Engineering |
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facultyofscienceandengineering |
hierarchy_top_title |
Faculty of Science and Engineering |
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facultyofscienceandengineering |
hierarchy_parent_title |
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 |
document_store_str |
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active_str |
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description |
The equilibrium structures and dynamics of a nanoscale system are regulated by a complex potential energy surface (PES). This is a key target of theoretical calculations but experimentally elusive. We report the measurement of a key PES parameter for a model nanosystem: size-selected Au nanoclusters, soft-landed on amorphous silicon nitride supports. We obtain the energy difference between the most abundant structural isomers of magic number Au561 clusters, the decahedron and face-centred-cubic (fcc) structures, from the equilibrium proportions of the isomers. These are measured by atomic-resolution scanning transmission electron microscopy, with an ultra-stable heating stage, as a function of temperature (125–500 °C). At lower temperatures (20–125 °C) the behaviour is kinetic, exhibiting down conversion of metastable decahedra into fcc structures; the higher state is repopulated at higher temperatures in equilibrium. We find the decahedron is 0.040 ± 0.020 eV higher in energy than the fcc isomer, providing a benchmark for the theoretical treatment of nanoparticles. |
published_date |
2018-04-03T03:49:56Z |
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1763752433433968640 |
score |
11.012678 |