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Exploring the atomic structure of 1.8 nm monolayer-protected gold clusters with aberration-corrected STEM

Jian Liu, Nan Jian, Isabel Ornelas, Alexander J. Pattison, Tanja Lahtinen, Kirsi Salorinne, Hannu Häkkinen, Richard Palmer Orcid Logo

Ultramicroscopy, Volume: 176, Pages: 146 - 150

Swansea University Author: Richard Palmer Orcid Logo

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DOI (Published version): 10.1016/j.ultramic.2016.11.021

Abstract

Monolayer-protected (MP) Au clusters present attractive quantum systems with a range of potential applications e.g. in catalysis. Knowledge of the atomic structure is needed to obtain a full understanding of their intriguing physical and chemical properties. Here we employed aberration-corrected sca...

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Published in: Ultramicroscopy
ISSN: 0304-3991
Published: 2017
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URI: https://cronfa.swan.ac.uk/Record/cronfa49225
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spelling 2019-05-13T11:16:50.7925267 v2 49225 2019-03-18 Exploring the atomic structure of 1.8 nm monolayer-protected gold clusters with aberration-corrected STEM 6ae369618efc7424d9774377536ea519 0000-0001-8728-8083 Richard Palmer Richard Palmer true false 2019-03-18 MECH Monolayer-protected (MP) Au clusters present attractive quantum systems with a range of potential applications e.g. in catalysis. Knowledge of the atomic structure is needed to obtain a full understanding of their intriguing physical and chemical properties. Here we employed aberration-corrected scanning transmission electron microscopy (ac-STEM), combined with multislice simulations, to make a round-robin investigation of the atomic structure of chemically synthesised clusters with nominal composition Au144(SCH2CH2Ph)60 provided by two different research groups. The MP Au clusters were “weighed” by the atom counting method, based on their integrated intensities in the high angle annular dark field (HAADF) regime and calibrated exponent of the Z dependence. For atomic structure analysis, we compared experimental images of hundreds of clusters, with atomic resolution, against a variety of structural models. Across the size range 123–151 atoms, only 3% of clusters matched the theoretically predicted Au144(SR)60 structure, while a large proportion of the clusters were amorphous (i.e. did not match any model structure). However, a distinct ring-dot feature, characteristic of local icosahedral symmetry, was observed in about 20% of the clusters. Journal Article Ultramicroscopy 176 146 150 0304-3991 Monolayer-protected gold clusters, Aberration-corrected STEM, Au144(SR)60, Atom counting method, Atomic structure 31 5 2017 2017-05-31 10.1016/j.ultramic.2016.11.021 https://research.birmingham.ac.uk/portal/en/publications/exploring-the-atomic-structure-of-18-nm-monolayerprotected-gold-clusters-with-aberrationcorrected-stem(f268b78c-fe9b-4621-aff3-abc806bf8b5a).html COLLEGE NANME Mechanical Engineering COLLEGE CODE MECH Swansea University 2019-05-13T11:16:50.7925267 2019-03-18T14:27:56.0846851 Faculty of Science and Engineering School of Aerospace, Civil, Electrical, General and Mechanical Engineering - Mechanical Engineering Jian Liu 1 Nan Jian 2 Isabel Ornelas 3 Alexander J. Pattison 4 Tanja Lahtinen 5 Kirsi Salorinne 6 Hannu Häkkinen 7 Richard Palmer 0000-0001-8728-8083 8
title Exploring the atomic structure of 1.8 nm monolayer-protected gold clusters with aberration-corrected STEM
spellingShingle Exploring the atomic structure of 1.8 nm monolayer-protected gold clusters with aberration-corrected STEM
Richard Palmer
title_short Exploring the atomic structure of 1.8 nm monolayer-protected gold clusters with aberration-corrected STEM
title_full Exploring the atomic structure of 1.8 nm monolayer-protected gold clusters with aberration-corrected STEM
title_fullStr Exploring the atomic structure of 1.8 nm monolayer-protected gold clusters with aberration-corrected STEM
title_full_unstemmed Exploring the atomic structure of 1.8 nm monolayer-protected gold clusters with aberration-corrected STEM
title_sort Exploring the atomic structure of 1.8 nm monolayer-protected gold clusters with aberration-corrected STEM
author_id_str_mv 6ae369618efc7424d9774377536ea519
author_id_fullname_str_mv 6ae369618efc7424d9774377536ea519_***_Richard Palmer
author Richard Palmer
author2 Jian Liu
Nan Jian
Isabel Ornelas
Alexander J. Pattison
Tanja Lahtinen
Kirsi Salorinne
Hannu Häkkinen
Richard Palmer
format Journal article
container_title Ultramicroscopy
container_volume 176
container_start_page 146
publishDate 2017
institution Swansea University
issn 0304-3991
doi_str_mv 10.1016/j.ultramic.2016.11.021
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 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
url https://research.birmingham.ac.uk/portal/en/publications/exploring-the-atomic-structure-of-18-nm-monolayerprotected-gold-clusters-with-aberrationcorrected-stem(f268b78c-fe9b-4621-aff3-abc806bf8b5a).html
document_store_str 0
active_str 0
description Monolayer-protected (MP) Au clusters present attractive quantum systems with a range of potential applications e.g. in catalysis. Knowledge of the atomic structure is needed to obtain a full understanding of their intriguing physical and chemical properties. Here we employed aberration-corrected scanning transmission electron microscopy (ac-STEM), combined with multislice simulations, to make a round-robin investigation of the atomic structure of chemically synthesised clusters with nominal composition Au144(SCH2CH2Ph)60 provided by two different research groups. The MP Au clusters were “weighed” by the atom counting method, based on their integrated intensities in the high angle annular dark field (HAADF) regime and calibrated exponent of the Z dependence. For atomic structure analysis, we compared experimental images of hundreds of clusters, with atomic resolution, against a variety of structural models. Across the size range 123–151 atoms, only 3% of clusters matched the theoretically predicted Au144(SR)60 structure, while a large proportion of the clusters were amorphous (i.e. did not match any model structure). However, a distinct ring-dot feature, characteristic of local icosahedral symmetry, was observed in about 20% of the clusters.
published_date 2017-05-31T04:00:02Z
_version_ 1763753069352321024
score 10.998002

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