Atomic deciphering of cation exchange mechanism in upconversion nanoparticles

Guan, M; Molokeev, MS; Zhou, J

Atomic deciphering of cation exchange mechanism in upconversion nanoparticles

Guan, M Molokeev, MS Zhou, J

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Publisher:: Elsevier BV
Publication Type:: Journal Article
Citation:: Journal of Luminescence, 2020, 224
Issue Date:: 2020-08-01

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Field	Value	Language
dc.contributor.author	Guan, M
dc.contributor.author	Molokeev, MS
dc.contributor.author	Zhou, J https://orcid.org/0000-0002-0605-5745
dc.date.accessioned	2020-10-23T03:49:59Z
dc.date.available	2020-10-23T03:49:59Z
dc.date.issued	2020-08-01
dc.identifier.citation	Journal of Luminescence, 2020, 224
dc.identifier.issn	0022-2313
dc.identifier.issn	1872-7883
dc.identifier.uri	http://hdl.handle.net/10453/143500
dc.description.abstract	© 2020 Transition metal ion doping in upconversion nanoparticles (UCNPs) provides an effective way to enhance the luminescence for their wide array of applications. However, the doping sites of transition metal ions have not been comprehensively explored, and commonly assumed that transition metal ions replace the trivalent lanthanides within the lattice. Here we report that cation exchange of transition metal (Mn2+) in β-NaYF4:Yb3+/Er3+ UCNPs occurs through alkaline metal (Na+) replacement, via 2Na+ ↔ Mn2+ + Vacancy reaction. This process distorts the LnF9 polyhedrons and tailors the surrounding environment around the trivalent lanthanides, thereby improving the upconversion intensity from active lanthanides. Further confirmed by core-shell design and spectroscopic study, we prove that the transition–alkaline metal exchange enables both the emission enhancement and transition probability variation of activators.
dc.language	en
dc.publisher	Elsevier BV
dc.relation	http://purl.org/au-research/grants/arc/DE180100669
dc.relation.ispartof	Journal of Luminescence
dc.relation.isbasedon	10.1016/j.jlumin.2020.117289
dc.rights	info:eu-repo/semantics/closedAccess
dc.subject	0205 Optical Physics, 0306 Physical Chemistry (incl. Structural)
dc.subject.classification	Applied Physics
dc.title	Atomic deciphering of cation exchange mechanism in upconversion nanoparticles
dc.type	Journal Article
utslib.citation.volume	224
utslib.for	0205 Optical Physics
utslib.for	0306 Physical Chemistry (incl. Structural)
pubs.organisational-group	/University of Technology Sydney/Faculty of Science
pubs.organisational-group	/University of Technology Sydney/Strength - IBMD - Initiative for Biomedical Devices
pubs.organisational-group	/University of Technology Sydney/Faculty of Science/School of Mathematical and Physical Sciences
pubs.organisational-group	/University of Technology Sydney
utslib.copyright.status	closed_access	*
pubs.consider-herdc	false
dc.date.updated	2020-10-23T03:49:26Z
pubs.publication-status	Published
pubs.volume	224

Abstract:

© 2020 Transition metal ion doping in upconversion nanoparticles (UCNPs) provides an effective way to enhance the luminescence for their wide array of applications. However, the doping sites of transition metal ions have not been comprehensively explored, and commonly assumed that transition metal ions replace the trivalent lanthanides within the lattice. Here we report that cation exchange of transition metal (Mn2+) in β-NaYF4:Yb3+/Er3+ UCNPs occurs through alkaline metal (Na+) replacement, via 2Na+ ↔ Mn2+ + Vacancy reaction. This process distorts the LnF9 polyhedrons and tailors the surrounding environment around the trivalent lanthanides, thereby improving the upconversion intensity from active lanthanides. Further confirmed by core-shell design and spectroscopic study, we prove that the transition–alkaline metal exchange enables both the emission enhancement and transition probability variation of activators.

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http://hdl.handle.net/10453/143500