Influence of Bound versus Non-Bound Stabilizing Molecules on the Thermal Stability of Gold Nanoparticles

King, SR; Shimmon, S; Totonjian, DD; McDonagh, AM

Influence of Bound versus Non-Bound Stabilizing Molecules on the Thermal Stability of Gold Nanoparticles

King, SR

Shimmon, S Totonjian, DD

McDonagh, AM

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Publication Type:: Journal Article
Citation:: Journal of Physical Chemistry C, 2017, 121 (25), pp. 13944 - 13951
Issue Date:: 2017-06-29

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Field	Value	Language
dc.contributor.author	King, SR https://orcid.org/0000-0002-4501-1841	en_US
dc.contributor.author	Shimmon, S	en_US
dc.contributor.author	Totonjian, DD https://orcid.org/0000-0002-9412-9416	en_US
dc.contributor.author	McDonagh, AM https://orcid.org/0000-0002-9502-1175	en_US
dc.date.issued	2017-06-29	en_US
dc.identifier.citation	Journal of Physical Chemistry C, 2017, 121 (25), pp. 13944 - 13951	en_US
dc.identifier.issn	1932-7447	en_US
dc.identifier.uri	http://hdl.handle.net/10453/124911
dc.description.abstract	© 2017 American Chemical Society. Knowledge concerning the sintering behavior of gold nanoparticles (AuNPs) allows for improved nanomaterials for applications such as printed electronics, catalysis and sensing. In this study, we examined the ability of a range of compounds to stabilize AuNPs against thermal sintering and compared compounds with and without functional groups that anchor the molecules to the nanoparticle surface. Thermal stability was characterized in terms of the temperature of the sintering event (TSE) as well as thermogravimetric analysis and scanning electron microscopy. We show that anchored stabilizing compounds with high thermal stability are effective at preventing the sintering of AuNPs until the decomposition of the compound. A TSE of 390 °C was achieved using 1-pyrenebutanethiol as stabilizer. Of the unanchored stabilizers, which were combined with butanethiol-capped AuNPs, two were found to be particularly effective: oleylamine (TSE ≈ 300 °C) and a perylenedicarboximide derivative (TSE ≈ 540 °C), the latter conferring an unprecedented level of thermal stability on ligand-stabilized AuNPs. When selecting stabilizers without anchoring groups, our results demonstrate the importance of choosing those that have an affinity with the capping ligands on the AuNPs to ensure a uniform mixture of AuNPs and stabilizer within a film.	en_US
dc.relation.ispartof	Journal of Physical Chemistry C	en_US
dc.relation.isbasedon	10.1021/acs.jpcc.7b04266	en_US
dc.subject.classification	Physical Chemistry	en_US
dc.title	Influence of Bound versus Non-Bound Stabilizing Molecules on the Thermal Stability of Gold Nanoparticles	en_US
dc.type	Journal Article
utslib.citation.volume	25	en_US
utslib.citation.volume	121	en_US
utslib.for	0904 Chemical Engineering	en_US
utslib.for	0301 Analytical Chemistry	en_US
utslib.for	1003 Industrial Biotechnology	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
utslib.copyright.status	open_access
pubs.issue	25	en_US
pubs.publication-status	Published	en_US
pubs.volume	121	en_US

Abstract:

© 2017 American Chemical Society. Knowledge concerning the sintering behavior of gold nanoparticles (AuNPs) allows for improved nanomaterials for applications such as printed electronics, catalysis and sensing. In this study, we examined the ability of a range of compounds to stabilize AuNPs against thermal sintering and compared compounds with and without functional groups that anchor the molecules to the nanoparticle surface. Thermal stability was characterized in terms of the temperature of the sintering event (TSE) as well as thermogravimetric analysis and scanning electron microscopy. We show that anchored stabilizing compounds with high thermal stability are effective at preventing the sintering of AuNPs until the decomposition of the compound. A TSE of 390 °C was achieved using 1-pyrenebutanethiol as stabilizer. Of the unanchored stabilizers, which were combined with butanethiol-capped AuNPs, two were found to be particularly effective: oleylamine (TSE ≈ 300 °C) and a perylenedicarboximide derivative (TSE ≈ 540 °C), the latter conferring an unprecedented level of thermal stability on ligand-stabilized AuNPs. When selecting stabilizers without anchoring groups, our results demonstrate the importance of choosing those that have an affinity with the capping ligands on the AuNPs to ensure a uniform mixture of AuNPs and stabilizer within a film.

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http://hdl.handle.net/10453/124911