Nano to macro transition of gold nanoparticles prior to sintering

Summers, P; Angeloski, A; Cortie, MB; Wuhrer, R; Mcdonagh, AM

Nano to macro transition of gold nanoparticles prior to sintering

Summers, P Angeloski, A Cortie, MB Wuhrer, R Mcdonagh, AM

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Publisher:: SPRINGER
Publication Type:: Journal Article
Citation:: JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS, 2025, 36, (28)
Issue Date:: 2025-10-01

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Field	Value	Language
dc.contributor.author	Summers, P
dc.contributor.author	Angeloski, A
dc.contributor.author	Cortie, MB
dc.contributor.author	Wuhrer, R
dc.contributor.author	Mcdonagh, AM
dc.date.accessioned	2025-10-15T04:23:43Z
dc.date.available	2025-10-15T04:23:43Z
dc.date.issued	2025-10-01
dc.identifier.citation	JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS, 2025, 36, (28)
dc.identifier.issn	0957-4522
dc.identifier.issn	1573-482X
dc.identifier.uri	http://hdl.handle.net/10453/190510
dc.description.abstract	The thermal behaviour of ligand-stabilised gold nanoparticles (AuNPs) is an important consideration when using these materials to form gold films via sintering. AuNPs stabilised with butanethiol and hexadecanethiol ligands displayed quite different properties upon heating up to their sintering temperatures. Films of AuNPs bearing the longer chain stabilising ligand hexadecanethiol become liquids at 56 °C. This temperature corresponds to the melting point of dihexadecyl disulfide, a known product that forms when such AuNPs are heated. No liquid phase was observed for butanethiol-stabilised AuNPs at any temperature. Films of the hexadecanethiol-stabilised AuNPs had high resistances (> 100 MΩ) at room temperature and the short-chain butanethiol-stabilised AuNPs had resistances in the kΩ range. Small-angle X-ray scattering data showed that the butanethiol-stabilised AuNPs begin to coarsen at ~ 140 °C whilst the hexadecanethiol particles began to coarsen ~ 90 °C.
dc.language	English
dc.publisher	SPRINGER
dc.relation.ispartof	JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
dc.relation.isbasedon	10.1007/s10854-025-15854-0
dc.rights	info:eu-repo/semantics/openAccess
dc.subject	0906 Electrical and Electronic Engineering, 0912 Materials Engineering
dc.subject.classification	Applied Physics
dc.subject.classification	4016 Materials engineering
dc.subject.classification	5104 Condensed matter physics
dc.title	Nano to macro transition of gold nanoparticles prior to sintering
dc.type	Journal Article
utslib.citation.volume	36
utslib.for	0906 Electrical and Electronic Engineering
utslib.for	0912 Materials Engineering
pubs.organisational-group	University of Technology Sydney
pubs.organisational-group	University of Technology Sydney/Faculty of Science
pubs.organisational-group	University of Technology Sydney/Faculty of Science/School of Mathematical and Physical Sciences
pubs.organisational-group	University of Technology Sydney/UTS Groups
pubs.organisational-group	University of Technology Sydney/UTS Groups/Centre for Clean Energy Technology (CCET)
utslib.copyright.status	open_access	*
dc.rights.license	This work is licensed under a Creative Commons Attribution 4.0 International License (CC BY 4.0). To view a copy of this license, visit https://creativecommons.org/licenses/by/4.0/
dc.date.updated	2025-10-15T04:23:38Z
pubs.issue	28
pubs.publication-status	Published
pubs.volume	36
utslib.citation.issue	28

Abstract:

The thermal behaviour of ligand-stabilised gold nanoparticles (AuNPs) is an important consideration when using these materials to form gold films via sintering. AuNPs stabilised with butanethiol and hexadecanethiol ligands displayed quite different properties upon heating up to their sintering temperatures. Films of AuNPs bearing the longer chain stabilising ligand hexadecanethiol become liquids at 56 °C. This temperature corresponds to the melting point of dihexadecyl disulfide, a known product that forms when such AuNPs are heated. No liquid phase was observed for butanethiol-stabilised AuNPs at any temperature. Films of the hexadecanethiol-stabilised AuNPs had high resistances (> 100 MΩ) at room temperature and the short-chain butanethiol-stabilised AuNPs had resistances in the kΩ range. Small-angle X-ray scattering data showed that the butanethiol-stabilised AuNPs begin to coarsen at ~ 140 °C whilst the hexadecanethiol particles began to coarsen ~ 90 °C.

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http://hdl.handle.net/10453/190510