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Formation and emission mechanisms of Ag nanoclusters in the Ar matrix assembly cluster source

Junlei Zhao, Lu Cao, Richard Palmer Orcid Logo, Kai Nordlund, Flyura Djurabekova

Physical Review Materials, Volume: 1, Issue: 6

Swansea University Author: Richard Palmer Orcid Logo

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DOI (Published version): 10.1103/PhysRevMaterials.1.066002

Abstract

In this paper, we study the mechanisms of growth of Ag nanoclusters in a solid Ar matrix and the emission of these nanoclusters from the matrix by a combination of experimental and theoretical methods. The molecular dynamics simulations show that the cluster growth mechanism can be described as “the...

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Published in: Physical Review Materials
ISSN: 2475-9953
Published: 2017
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URI: https://cronfa.swan.ac.uk/Record/cronfa38241
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first_indexed 2018-01-22T14:26:12Z
last_indexed 2018-03-12T20:27:58Z
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spelling 2018-03-12T14:24:18.4471463 v2 38241 2018-01-22 Formation and emission mechanisms of Ag nanoclusters in the Ar matrix assembly cluster source 6ae369618efc7424d9774377536ea519 0000-0001-8728-8083 Richard Palmer Richard Palmer true false 2018-01-22 MECH In this paper, we study the mechanisms of growth of Ag nanoclusters in a solid Ar matrix and the emission of these nanoclusters from the matrix by a combination of experimental and theoretical methods. The molecular dynamics simulations show that the cluster growth mechanism can be described as “thermal spike-enhanced clustering” in multiple sequential ion impact events. We further show that experimentally observed large sputtered metal clusters cannot be formed by direct sputtering of Ag mixed in the Ar. Instead, we describe the mechanism of emission of the metal nanocluster that, at first, is formed in the cryogenic matrix due to multiple ion impacts, and then is emitted as a result of the simultaneous effects of interface boiling and spring force. We also develop an analytical model describing this size-dependent cluster emission. The model bridges the atomistic simulations and experimental time and length scales, and allows increasing the controllability of fast generation of nanoclusters in experiments with a high production rate. Journal Article Physical Review Materials 1 6 2475-9953 29 11 2017 2017-11-29 10.1103/PhysRevMaterials.1.066002 COLLEGE NANME Mechanical Engineering COLLEGE CODE MECH Swansea University 2018-03-12T14:24:18.4471463 2018-01-22T12:45:42.0306868 Faculty of Science and Engineering School of Aerospace, Civil, Electrical, General and Mechanical Engineering - Mechanical Engineering Junlei Zhao 1 Lu Cao 2 Richard Palmer 0000-0001-8728-8083 3 Kai Nordlund 4 Flyura Djurabekova 5 0038241-22012018124824.pdf zhao2017.pdf 2018-01-22T12:48:24.1170000 Output 3118998 application/pdf Version of Record true 2018-01-22T00:00:00.0000000 true eng
title Formation and emission mechanisms of Ag nanoclusters in the Ar matrix assembly cluster source
spellingShingle Formation and emission mechanisms of Ag nanoclusters in the Ar matrix assembly cluster source
Richard Palmer
title_short Formation and emission mechanisms of Ag nanoclusters in the Ar matrix assembly cluster source
title_full Formation and emission mechanisms of Ag nanoclusters in the Ar matrix assembly cluster source
title_fullStr Formation and emission mechanisms of Ag nanoclusters in the Ar matrix assembly cluster source
title_full_unstemmed Formation and emission mechanisms of Ag nanoclusters in the Ar matrix assembly cluster source
title_sort Formation and emission mechanisms of Ag nanoclusters in the Ar matrix assembly cluster source
author_id_str_mv 6ae369618efc7424d9774377536ea519
author_id_fullname_str_mv 6ae369618efc7424d9774377536ea519_***_Richard Palmer
author Richard Palmer
author2 Junlei Zhao
Lu Cao
Richard Palmer
Kai Nordlund
Flyura Djurabekova
format Journal article
container_title Physical Review Materials
container_volume 1
container_issue 6
publishDate 2017
institution Swansea University
issn 2475-9953
doi_str_mv 10.1103/PhysRevMaterials.1.066002
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 In this paper, we study the mechanisms of growth of Ag nanoclusters in a solid Ar matrix and the emission of these nanoclusters from the matrix by a combination of experimental and theoretical methods. The molecular dynamics simulations show that the cluster growth mechanism can be described as “thermal spike-enhanced clustering” in multiple sequential ion impact events. We further show that experimentally observed large sputtered metal clusters cannot be formed by direct sputtering of Ag mixed in the Ar. Instead, we describe the mechanism of emission of the metal nanocluster that, at first, is formed in the cryogenic matrix due to multiple ion impacts, and then is emitted as a result of the simultaneous effects of interface boiling and spring force. We also develop an analytical model describing this size-dependent cluster emission. The model bridges the atomistic simulations and experimental time and length scales, and allows increasing the controllability of fast generation of nanoclusters in experiments with a high production rate.
published_date 2017-11-29T03:48:21Z
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score 11.013371

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