Thermal-Sensitive Luminescence Dynamics of NaNdF<inf>4</inf>:Yb@CaF<inf>2</inf> Nanostructures as Nanothermometers

Wen, C; Kong, M; Gu, Y; Zhang, J; Chen, X; Sun, LD; Feng, W

Thermal-Sensitive Luminescence Dynamics of NaNdF<inf>4</inf>:Yb@CaF<inf>2</inf> Nanostructures as Nanothermometers

Wen, C Kong, M Gu, Y

Zhang, J Chen, X Sun, LD Feng, W

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Publisher:: AMER CHEMICAL SOC
Publication Type:: Journal Article
Citation:: ACS Applied Nano Materials, 2023, 6, (11), pp. 9839-9848
Issue Date:: 2023-06-09

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Field	Value	Language
dc.contributor.author	Wen, C
dc.contributor.author	Kong, M
dc.contributor.author	Gu, Y https://orcid.org/0000-0002-0826-1868
dc.contributor.author	Zhang, J
dc.contributor.author	Chen, X
dc.contributor.author	Sun, LD
dc.contributor.author	Feng, W
dc.date.accessioned	2024-04-02T03:20:42Z
dc.date.available	2024-04-02T03:20:42Z
dc.date.issued	2023-06-09
dc.identifier.citation	ACS Applied Nano Materials, 2023, 6, (11), pp. 9839-9848
dc.identifier.issn	2574-0970
dc.identifier.issn	2574-0970
dc.identifier.uri	http://hdl.handle.net/10453/177423
dc.description.abstract	Luminescence nanothermometry is arousing wide interest due to its noninvasive, real-time, and nanometrically spatially precise potentials. The peculiar luminescence properties of rare-earth-doped nanomaterials, such as their superstability and long lifetime, demonstrate their necessity in high-accuracy thermal sensing. Among the rare-earth nanothermometers, the recently emerged energy-transfer-based nanothermometers (e.g., NaNdF4:Yb@CaF2 nanocrystals) provide a credible lifetime signal with high sensitivity. However, the rationale for this property remains unexplored. The unclear rationale limits the systematic and targeted optimization of energy-transfer-based nanothermometers. Here, we reveal the working principle of energy-transfer-based NaNdF4:Yb@CaF2 nanothermometers with the classical rate equation model and experimental verifications. Dominated by the proportion between the energy transfer and back transfer rates of Nd3+ and Yb3+, the 2F5/2(Yb3+) population decays mono-exponentially after 50 μs of the withdrawal of excitation. This is the prerequisite for the 2F5/2(Yb3+) lifetime to be used as an accurate interference-free detection signal. The rate equation model is also used to investigate the concentration dependence of the thermal sensitivity of NaNdF4:Yb@CaF2 nanocrystals. The thermal sensitivity gets better with a declining Yb3+ concentration. These insights into thermal-sensitive luminescence dynamics pave the way for further material optimization toward nanothermometers with better performance.
dc.language	English
dc.publisher	AMER CHEMICAL SOC
dc.relation.ispartof	ACS Applied Nano Materials
dc.relation.isbasedon	10.1021/acsanm.3c01579
dc.rights	info:eu-repo/semantics/closedAccess
dc.subject.classification	3106 Industrial biotechnology
dc.subject.classification	3403 Macromolecular and materials chemistry
dc.subject.classification	4018 Nanotechnology
dc.title	Thermal-Sensitive Luminescence Dynamics of NaNdF<inf>4</inf>:Yb@CaF<inf>2</inf> Nanostructures as Nanothermometers
dc.type	Journal Article
utslib.citation.volume	6
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	closed_access	*
dc.date.updated	2024-04-02T03:20:40Z
pubs.issue	11
pubs.publication-status	Published
pubs.volume	6
utslib.citation.issue	11

Abstract:

Luminescence nanothermometry is arousing wide interest due to its noninvasive, real-time, and nanometrically spatially precise potentials. The peculiar luminescence properties of rare-earth-doped nanomaterials, such as their superstability and long lifetime, demonstrate their necessity in high-accuracy thermal sensing. Among the rare-earth nanothermometers, the recently emerged energy-transfer-based nanothermometers (e.g., NaNdF4:Yb@CaF2 nanocrystals) provide a credible lifetime signal with high sensitivity. However, the rationale for this property remains unexplored. The unclear rationale limits the systematic and targeted optimization of energy-transfer-based nanothermometers. Here, we reveal the working principle of energy-transfer-based NaNdF4:Yb@CaF2 nanothermometers with the classical rate equation model and experimental verifications. Dominated by the proportion between the energy transfer and back transfer rates of Nd3+ and Yb3+, the 2F5/2(Yb3+) population decays mono-exponentially after 50 μs of the withdrawal of excitation. This is the prerequisite for the 2F5/2(Yb3+) lifetime to be used as an accurate interference-free detection signal. The rate equation model is also used to investigate the concentration dependence of the thermal sensitivity of NaNdF4:Yb@CaF2 nanocrystals. The thermal sensitivity gets better with a declining Yb3+ concentration. These insights into thermal-sensitive luminescence dynamics pave the way for further material optimization toward nanothermometers with better performance.

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http://hdl.handle.net/10453/177423