On the coalescence of nanoparticulate gold sinter ink

Cortie, MB; Coutts, MJ; Ton-That, C; Dowd, A; Keast, VJ; McDonagh, AM

On the coalescence of nanoparticulate gold sinter ink

Cortie, MB

Coutts, MJ Ton-That, C

Dowd, A

Keast, VJ McDonagh, AM

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Publication Type:: Journal Article
Citation:: Journal of Physical Chemistry C, 2013, 117 (21), pp. 11377 - 11384
Issue Date:: 2013-05-30

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Field	Value	Language
dc.contributor.author	Cortie, MB https://orcid.org/0000-0003-3202-6398	en_US
dc.contributor.author	Coutts, MJ	en_US
dc.contributor.author	Ton-That, C https://orcid.org/0000-0003-3276-1739	en_US
dc.contributor.author	Dowd, A https://orcid.org/0000-0002-0500-3599	en_US
dc.contributor.author	Keast, VJ	en_US
dc.contributor.author	McDonagh, AM https://orcid.org/0000-0002-9502-1175	en_US
dc.date.issued	2013-05-30	en_US
dc.identifier.citation	Journal of Physical Chemistry C, 2013, 117 (21), pp. 11377 - 11384	en_US
dc.identifier.issn	1932-7447	en_US
dc.identifier.uri	http://hdl.handle.net/10453/26472
dc.description.abstract	We examine the mechanism by which thiol-protected gold nanoparticle inks can sinter at surprisingly low temperatures. At room temperature the sample is comprised of randomly close-packed gold nanoparticles of about 2.3 nm diameter with a ligand shell of about 0.2 nm effective thickness. As the particles are heated through 80 C they begin to coarsen, reaching about 10 nm diameter at 180 C. Upon further heating, rapid sintering and grain growth occurs at a temperature that depends on environment and heating rate. Sintering in vacuum requires a higher temperature than in oxidizing environments. Mass spectrometry in the former case is consistent with volatile species such as C 4H9, C2SH, and C2H4 being displaced, whereas XPS shows that the exposed surface of the Au is rich in C and S. However, when sintering is performed in the presence of even trace O 2, it is the Au-S bond that is cleaved, and the sintering temperature is lowered by up to 50 C. In this case mass spectrometry shows the generation of alkane and thiol fragments, some S2 and H2S, and oxidized sulfur-containing species, whereas XPS shows that C and S on the Au surface is much reduced. © 2013 American Chemical Society.	en_US
dc.relation.ispartof	Journal of Physical Chemistry C	en_US
dc.relation.isbasedon	10.1021/jp401815b	en_US
dc.subject.classification	Physical Chemistry	en_US
dc.title	On the coalescence of nanoparticulate gold sinter ink	en_US
dc.type	Journal Article
utslib.citation.volume	21	en_US
utslib.citation.volume	117	en_US
utslib.for	0912 Materials Engineering	en_US
utslib.for	0306 Physical Chemistry (incl. Structural)	en_US
utslib.for	03 Chemical Sciences	en_US
utslib.for	09 Engineering	en_US
utslib.for	10 Technology	en_US
pubs.embargo.period	Not known	en_US
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/Strength - CCET - Centre for Clean Energy Technology
pubs.organisational-group	/University of Technology Sydney/Students
utslib.copyright.status	in_progress
pubs.issue	21	en_US
pubs.publication-status	Published	en_US
pubs.volume	117	en_US

Abstract:

We examine the mechanism by which thiol-protected gold nanoparticle inks can sinter at surprisingly low temperatures. At room temperature the sample is comprised of randomly close-packed gold nanoparticles of about 2.3 nm diameter with a ligand shell of about 0.2 nm effective thickness. As the particles are heated through 80 C they begin to coarsen, reaching about 10 nm diameter at 180 C. Upon further heating, rapid sintering and grain growth occurs at a temperature that depends on environment and heating rate. Sintering in vacuum requires a higher temperature than in oxidizing environments. Mass spectrometry in the former case is consistent with volatile species such as C 4H9, C2SH, and C2H4 being displaced, whereas XPS shows that the exposed surface of the Au is rich in C and S. However, when sintering is performed in the presence of even trace O 2, it is the Au-S bond that is cleaved, and the sintering temperature is lowered by up to 50 C. In this case mass spectrometry shows the generation of alkane and thiol fragments, some S2 and H2S, and oxidized sulfur-containing species, whereas XPS shows that C and S on the Au surface is much reduced. © 2013 American Chemical Society.

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http://hdl.handle.net/10453/26472