Flow-Based Synthesis of Gold-Coated Magnetic Nanoparticles for Magnetoplasmonic Sensing Applications

Mehdipour, M; Gloag, L; Hagness, D; Lian, J; Alam, MS; Chen, X; Tilley, RD; Gooding, JJ

Flow-Based Synthesis of Gold-Coated Magnetic Nanoparticles for Magnetoplasmonic Sensing Applications

Mehdipour, M Gloag, L

Hagness, D Lian, J Alam, MS Chen, X Tilley, RD Gooding, JJ

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Publisher:: Wiley
Publication Type:: Journal Article
Citation:: Particle and Particle Systems Characterization, 2022, 39, (8), pp. 2200051
Issue Date:: 2022-08-01

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Field	Value	Language
dc.contributor.author	Mehdipour, M
dc.contributor.author	Gloag, L https://orcid.org/0000-0001-7548-1521
dc.contributor.author	Hagness, D
dc.contributor.author	Lian, J
dc.contributor.author	Alam, MS
dc.contributor.author	Chen, X
dc.contributor.author	Tilley, RD
dc.contributor.author	Gooding, JJ
dc.date.accessioned	2023-04-04T01:22:14Z
dc.date.available	2023-04-04T01:22:14Z
dc.date.issued	2022-08-01
dc.identifier.citation	Particle and Particle Systems Characterization, 2022, 39, (8), pp. 2200051
dc.identifier.issn	0934-0866
dc.identifier.issn	1521-4117
dc.identifier.uri	http://hdl.handle.net/10453/169096
dc.description.abstract	Gold-coated magnetic nanoparticles are key materials for the fast separation and ultrasensitive detection of analytes in magnetoplasmonic sensors. However, the synthesis of gold-coated magnetic nanoparticles typically requires small-scale, colloidal methods over hours or days and often results in incomplete shells with variable optical properties. A robust, rapid, and scalable synthesis method is still needed to reliably form a complete gold nanoshell around magnetic nanoparticles. Herein, a new methodology for the synthesis of gold-coated magnetic nanoparticles via a flow-based manufacturing system that can easily be scaled up is presented. The developed method first produces gold-seeded silica coated magnetic nanoparticles and then a complete, tunable gold shell with relatively uniform size and shape. The flow-based method can be performed in a total time of less than 2 min, enabling rapid and complete gold coating. The particles show both excellent magnetic and plasmonic properties, which facilitates application as biosensing agents in dark-field microscopy and surface-enhanced Raman scattering.
dc.language	en
dc.publisher	Wiley
dc.relation.ispartof	Particle and Particle Systems Characterization
dc.relation.isbasedon	10.1002/ppsc.202200051
dc.rights	info:eu-repo/semantics/openAccess
dc.subject	0299 Other Physical Sciences, 0904 Chemical Engineering, 0913 Mechanical Engineering
dc.subject.classification	Chemical Engineering
dc.title	Flow-Based Synthesis of Gold-Coated Magnetic Nanoparticles for Magnetoplasmonic Sensing Applications
dc.type	Journal Article
utslib.citation.volume	39
utslib.for	0299 Other Physical Sciences
utslib.for	0904 Chemical Engineering
utslib.for	0913 Mechanical 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
utslib.copyright.status	open_access	*
dc.date.updated	2023-04-04T01:22:12Z
pubs.issue	8
pubs.publication-status	Published
pubs.volume	39
utslib.citation.issue	8

Abstract:

Gold-coated magnetic nanoparticles are key materials for the fast separation and ultrasensitive detection of analytes in magnetoplasmonic sensors. However, the synthesis of gold-coated magnetic nanoparticles typically requires small-scale, colloidal methods over hours or days and often results in incomplete shells with variable optical properties. A robust, rapid, and scalable synthesis method is still needed to reliably form a complete gold nanoshell around magnetic nanoparticles. Herein, a new methodology for the synthesis of gold-coated magnetic nanoparticles via a flow-based manufacturing system that can easily be scaled up is presented. The developed method first produces gold-seeded silica coated magnetic nanoparticles and then a complete, tunable gold shell with relatively uniform size and shape. The flow-based method can be performed in a total time of less than 2 min, enabling rapid and complete gold coating. The particles show both excellent magnetic and plasmonic properties, which facilitates application as biosensing agents in dark-field microscopy and surface-enhanced Raman scattering.

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http://hdl.handle.net/10453/169096