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Unravelling the nucleation mechanism of bimetallic nanoparticles with composition-tunable core–shell arrangement

Ting-Wei Liao, Anupam Yadav, Kuo-Juei Hu, Johan van der Tol, Salvatore Cosentino, Francesco D'Acapito, Richard Palmer Orcid Logo, Cristina Lenardi, Riccardo Ferrando, Didier Grandjean, Peter Lievens

Nanoscale, Volume: 10, Issue: 14, Pages: 6684 - 6694

Swansea University Author: Richard Palmer Orcid Logo

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DOI (Published version): 10.1039/C8NR01481G

Abstract

The structure and atomic ordering of Au–Ag nanoparticles grown in the gas phase are determined by a combination of HAADF-STEM, XPS and Refl-XAFS techniques as a function of composition. It is shown consistently from all the techniques that an inversion of chemical ordering takes place by going from...

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Published in: Nanoscale
ISSN: 2040-3364 2040-3372
Published: 2018
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URI: https://cronfa.swan.ac.uk/Record/cronfa39341
first_indexed 2018-04-09T13:29:57Z
last_indexed 2018-05-22T13:12:39Z
id cronfa39341
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spelling 2018-05-22T12:10:58.9442704 v2 39341 2018-04-09 Unravelling the nucleation mechanism of bimetallic nanoparticles with composition-tunable core–shell arrangement 6ae369618efc7424d9774377536ea519 0000-0001-8728-8083 Richard Palmer Richard Palmer true false 2018-04-09 ACEM The structure and atomic ordering of Au–Ag nanoparticles grown in the gas phase are determined by a combination of HAADF-STEM, XPS and Refl-XAFS techniques as a function of composition. It is shown consistently from all the techniques that an inversion of chemical ordering takes place by going from Au-rich to Ag-rich compositions, with the minority element always occupying the nanoparticle core, and the majority element enriching the shell. With the aid of DFT calculations, this composition-tunable chemical arrangement is rationalized in terms of a four-step growth process in which the very first stage of cluster nucleation plays a crucial role. The four-step growth mechanism is based on mechanisms of a general character, likely to be applicable to a variety of binary systems besides Au–Ag. Journal Article Nanoscale 10 14 6684 6694 2040-3364 2040-3372 31 12 2018 2018-12-31 10.1039/C8NR01481G COLLEGE NANME Aerospace, Civil, Electrical, and Mechanical Engineering COLLEGE CODE ACEM Swansea University 2018-05-22T12:10:58.9442704 2018-04-09T10:52:24.1126699 Faculty of Science and Engineering School of Aerospace, Civil, Electrical, General and Mechanical Engineering - Mechanical Engineering Ting-Wei Liao 1 Anupam Yadav 2 Kuo-Juei Hu 3 Johan van der Tol 4 Salvatore Cosentino 5 Francesco D'Acapito 6 Richard Palmer 0000-0001-8728-8083 7 Cristina Lenardi 8 Riccardo Ferrando 9 Didier Grandjean 10 Peter Lievens 11 0039341-09042018105352.pdf liao2018.pdf 2018-04-09T10:53:52.3470000 Output 2371714 application/pdf Accepted Manuscript true 2019-03-23T00:00:00.0000000 true eng
title Unravelling the nucleation mechanism of bimetallic nanoparticles with composition-tunable core–shell arrangement
spellingShingle Unravelling the nucleation mechanism of bimetallic nanoparticles with composition-tunable core–shell arrangement
Richard Palmer
title_short Unravelling the nucleation mechanism of bimetallic nanoparticles with composition-tunable core–shell arrangement
title_full Unravelling the nucleation mechanism of bimetallic nanoparticles with composition-tunable core–shell arrangement
title_fullStr Unravelling the nucleation mechanism of bimetallic nanoparticles with composition-tunable core–shell arrangement
title_full_unstemmed Unravelling the nucleation mechanism of bimetallic nanoparticles with composition-tunable core–shell arrangement
title_sort Unravelling the nucleation mechanism of bimetallic nanoparticles with composition-tunable core–shell arrangement
author_id_str_mv 6ae369618efc7424d9774377536ea519
author_id_fullname_str_mv 6ae369618efc7424d9774377536ea519_***_Richard Palmer
author Richard Palmer
author2 Ting-Wei Liao
Anupam Yadav
Kuo-Juei Hu
Johan van der Tol
Salvatore Cosentino
Francesco D'Acapito
Richard Palmer
Cristina Lenardi
Riccardo Ferrando
Didier Grandjean
Peter Lievens
format Journal article
container_title Nanoscale
container_volume 10
container_issue 14
container_start_page 6684
publishDate 2018
institution Swansea University
issn 2040-3364
2040-3372
doi_str_mv 10.1039/C8NR01481G
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
document_store_str 1
active_str 0
description The structure and atomic ordering of Au–Ag nanoparticles grown in the gas phase are determined by a combination of HAADF-STEM, XPS and Refl-XAFS techniques as a function of composition. It is shown consistently from all the techniques that an inversion of chemical ordering takes place by going from Au-rich to Ag-rich compositions, with the minority element always occupying the nanoparticle core, and the majority element enriching the shell. With the aid of DFT calculations, this composition-tunable chemical arrangement is rationalized in terms of a four-step growth process in which the very first stage of cluster nucleation plays a crucial role. The four-step growth mechanism is based on mechanisms of a general character, likely to be applicable to a variety of binary systems besides Au–Ag.
published_date 2018-12-31T04:23:46Z
_version_ 1821287410991890432
score 11.390808

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