Neuromorphic nanocluster networks: Critical role of the substrate in nano-link formation

Wu, Wenkai; Verkhovtsev, Alexey V.; Pavloudis, Theodore; Solov’yov, Andrey V.; Palmer, Richard; WU, WENKAI

doi:10.1007/s12274-023-5744-5

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Neuromorphic nanocluster networks: Critical role of the substrate in nano-link formation

Wenkai Wu, Alexey V. Verkhovtsev, Theodore Pavloudis, Andrey V. Solov’yov, Richard Palmer

, WENKAI WU

Nano Research, Volume: 16

Swansea University Authors: Wenkai Wu, Theodore Pavloudis, Richard Palmer , WENKAI WU

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DOI (Published version): 10.1007/s12274-023-5744-5

Abstract

Atomic cluster-based networks represent a promising architecture for the realization of neuromorphic computing systems, which may overcome some of the limitations of the current computing paradigm. The formation and breakage of links between the clusters are of utmost importance for the functioning...

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Published in:	Nano Research
ISSN:	1998-0124 1998-0000
Published:	Springer Science and Business Media LLC
Online Access:	Check full text
URI:	https://cronfa.swan.ac.uk/Record/cronfa63209

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spelling	2023-09-04T17:07:33.0336054 v2 63209 2023-04-19 Neuromorphic nanocluster networks: Critical role of the substrate in nano-link formation a16d7aa164dbd160483d176cd72c1fdd Wenkai Wu Wenkai Wu true false dd06e768e93bf50482735456af6f5a04 Theodore Pavloudis Theodore Pavloudis true false 6ae369618efc7424d9774377536ea519 0000-0001-8728-8083 Richard Palmer Richard Palmer true false 74bbf8e3606de3fcf398fc6151976b46 WENKAI WU WENKAI WU true false 2023-04-19 Atomic cluster-based networks represent a promising architecture for the realization of neuromorphic computing systems, which may overcome some of the limitations of the current computing paradigm. The formation and breakage of links between the clusters are of utmost importance for the functioning of these computing systems. This paper reports the results of molecular dynamics simulations of synapse (bridge) formation at elevated temperature and thermal breaking processes between 2.8 nm-sized Au1415 clusters deposited on a carbon substrate, a model system. Crucially, we find that the bridge formation process is driven by the diffusion of gold atoms along the substrate, no matter how small the gap between the clusters themselves. The complementary simulations of the bridge breaking process reveal the existence of a threshold bias voltage to activate bridge rupture via Joule heating. These results provide an atomistic-level understanding of the fundamental dynamical processes occurring in neuromorphic cluster arrays. Journal Article Nano Research 16 Springer Science and Business Media LLC 1998-0124 1998-0000 Atomic-switch network, nanoclusters, nanoparticles, clusters on surfaces, synapse, neuromorphics, molecular dynamics. 0 0 0 0001-01-01 10.1007/s12274-023-5744-5 http://dx.doi.org/10.1007/s12274-023-5744-5 COLLEGE NANME COLLEGE CODE Swansea University SU Library paid the OA fee (TA Institutional Deal) 2023-09-04T17:07:33.0336054 2023-04-19T15:08:11.2742698 Faculty of Science and Engineering School of Aerospace, Civil, Electrical, General and Mechanical Engineering - Mechanical Engineering Wenkai Wu 1 Alexey V. Verkhovtsev 2 Theodore Pavloudis 3 Andrey V. Solov’yov 4 Richard Palmer 0000-0001-8728-8083 5 WENKAI WU 6 63209__27698__b7aa346312014e8eb64f096afe545bd4.pdf 63209.pdf 2023-06-05T09:13:50.4376008 Output 3033409 application/pdf Version of Record true This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. true eng http://creativecommons.org/licenses/by/4.0/
title	Neuromorphic nanocluster networks: Critical role of the substrate in nano-link formation
spellingShingle	Neuromorphic nanocluster networks: Critical role of the substrate in nano-link formation Wenkai Wu Theodore Pavloudis Richard Palmer WENKAI WU
title_short	Neuromorphic nanocluster networks: Critical role of the substrate in nano-link formation
title_full	Neuromorphic nanocluster networks: Critical role of the substrate in nano-link formation
title_fullStr	Neuromorphic nanocluster networks: Critical role of the substrate in nano-link formation
title_full_unstemmed	Neuromorphic nanocluster networks: Critical role of the substrate in nano-link formation
title_sort	Neuromorphic nanocluster networks: Critical role of the substrate in nano-link formation
author_id_str_mv	a16d7aa164dbd160483d176cd72c1fdd dd06e768e93bf50482735456af6f5a04 6ae369618efc7424d9774377536ea519 74bbf8e3606de3fcf398fc6151976b46
author_id_fullname_str_mv	a16d7aa164dbd160483d176cd72c1fdd_*_Wenkai Wu dd06e768e93bf50482735456af6f5a04__Theodore Pavloudis 6ae369618efc7424d9774377536ea519__Richard Palmer 74bbf8e3606de3fcf398fc6151976b46_*_WENKAI WU
author	Wenkai Wu Theodore Pavloudis Richard Palmer WENKAI WU
author2	Wenkai Wu Alexey V. Verkhovtsev Theodore Pavloudis Andrey V. Solov’yov Richard Palmer WENKAI WU
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container_title	Nano Research
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publisher	Springer Science and Business Media LLC
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url	http://dx.doi.org/10.1007/s12274-023-5744-5
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description	Atomic cluster-based networks represent a promising architecture for the realization of neuromorphic computing systems, which may overcome some of the limitations of the current computing paradigm. The formation and breakage of links between the clusters are of utmost importance for the functioning of these computing systems. This paper reports the results of molecular dynamics simulations of synapse (bridge) formation at elevated temperature and thermal breaking processes between 2.8 nm-sized Au1415 clusters deposited on a carbon substrate, a model system. Crucially, we find that the bridge formation process is driven by the diffusion of gold atoms along the substrate, no matter how small the gap between the clusters themselves. The complementary simulations of the bridge breaking process reveal the existence of a threshold bias voltage to activate bridge rupture via Joule heating. These results provide an atomistic-level understanding of the fundamental dynamical processes occurring in neuromorphic cluster arrays.
published_date	0001-01-01T08:20:57Z
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Neuromorphic nanocluster networks: Critical role of the substrate in nano-link formation

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