Reconstructing the Surface Structure of NaREF<inf>4</inf>Upconversion Nanocrystals with a Novel K<sup>+</sup>Treatment

Liu, D; Xu, X; Du, Y; Liao, J; Wen, S; Dong, X; Jin, Y; Liu, L; Jin, D; Capobianco, JA; Shen, D

Reconstructing the Surface Structure of NaREF<inf>4</inf>Upconversion Nanocrystals with a Novel K<sup>+</sup>Treatment

Liu, D Xu, X

Du, Y Liao, J

Wen, S

Dong, X Jin, Y Liu, L Jin, D

Capobianco, JA Shen, D

Permalink

Publisher:: American Chemical Society
Publication Type:: Journal Article
Citation:: Chemistry of Materials, 2021, 33, (7), pp. 2548-2556
Issue Date:: 2021-04-13

Closed Access

	Filename	Description	Size
	acs.chemmater.0c04956.pdf		6.23 MB	Adobe PDF	View/Open

Copyright Clearance Process

Recently Added
In Progress
Closed Access

This item is closed access and not available.

Full metadata record

Field	Value	Language
dc.contributor.author	Liu, D
dc.contributor.author	Xu, X https://orcid.org/0000-0002-2598-3766
dc.contributor.author	Du, Y
dc.contributor.author	Liao, J https://orcid.org/0000-0003-0616-4762
dc.contributor.author	Wen, S https://orcid.org/0000-0002-4670-4658
dc.contributor.author	Dong, X
dc.contributor.author	Jin, Y
dc.contributor.author	Liu, L
dc.contributor.author	Jin, D https://orcid.org/0000-0003-1046-2666
dc.contributor.author	Capobianco, JA
dc.contributor.author	Shen, D
dc.date.accessioned	2022-02-09T04:14:50Z
dc.date.available	2022-02-09T04:14:50Z
dc.date.issued	2021-04-13
dc.identifier.citation	Chemistry of Materials, 2021, 33, (7), pp. 2548-2556
dc.identifier.issn	0897-4756
dc.identifier.issn	1520-5002
dc.identifier.uri	http://hdl.handle.net/10453/154337
dc.description.abstract	Property of the nanocrystals' surface structure plays a key role in developing novel nanomaterials with high performance and new functionalities. Conventional methods of nanocrystal surface engineering are commonly based on tuning the synthesis reaction parameters or growing core-shell structures, which usually results in increasing the size of the nanoparticles. Here, we report an approach to tailoring the surface crystalline structure of β-NaYF4 nanocrystals by reheating the nanocrystals in a K+-rich environment of the oleic acid-1-octadecene (OA-ODE) system. We found that the crystal surface stability of nanocrystals was decreased in the K+-rich solution, which reconstructs the nanocrystals' surface into a porous surface structure. With a systematic design of experiments, the roles of the cations, such as K+, K+-Gd3+, and Na+-Y3+, are individually identified, which leads to a reformation of the surface structure of the hexagonal NaYF4 nanocrystal into different forms, e.g., a mesostructured, spherical, and diamond surface. The technique of tailoring the surface crystalline structures will provide new insight for the shape and surface-dependent property studies and luminescence enhancement without a size increase.
dc.language	English
dc.publisher	American Chemical Society
dc.relation	http://purl.org/au-research/grants/arc/FT130100517
dc.relation.ispartof	Chemistry of Materials
dc.relation.isbasedon	10.1021/acs.chemmater.0c04956
dc.rights	info:eu-repo/semantics/closedAccess
dc.subject	03 Chemical Sciences, 09 Engineering
dc.subject.classification	Materials
dc.title	Reconstructing the Surface Structure of NaREF<inf>4</inf>Upconversion Nanocrystals with a Novel K<sup>+</sup>Treatment
dc.type	Journal Article
utslib.citation.volume	33
utslib.for	03 Chemical Sciences
utslib.for	09 Engineering
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology
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/Faculty of Engineering and Information Technology/School of Biomedical Engineering
pubs.organisational-group	/University of Technology Sydney/Strength - IBMD - Initiative for Biomedical Devices
utslib.copyright.status	closed_access	*
pubs.consider-herdc	false
dc.date.updated	2022-02-09T04:14:46Z
pubs.issue	7
pubs.publication-status	Published
pubs.volume	33
utslib.citation.issue	7

Abstract:

Property of the nanocrystals' surface structure plays a key role in developing novel nanomaterials with high performance and new functionalities. Conventional methods of nanocrystal surface engineering are commonly based on tuning the synthesis reaction parameters or growing core-shell structures, which usually results in increasing the size of the nanoparticles. Here, we report an approach to tailoring the surface crystalline structure of β-NaYF4 nanocrystals by reheating the nanocrystals in a K+-rich environment of the oleic acid-1-octadecene (OA-ODE) system. We found that the crystal surface stability of nanocrystals was decreased in the K+-rich solution, which reconstructs the nanocrystals' surface into a porous surface structure. With a systematic design of experiments, the roles of the cations, such as K+, K+-Gd3+, and Na+-Y3+, are individually identified, which leads to a reformation of the surface structure of the hexagonal NaYF4 nanocrystal into different forms, e.g., a mesostructured, spherical, and diamond surface. The technique of tailoring the surface crystalline structures will provide new insight for the shape and surface-dependent property studies and luminescence enhancement without a size increase.

Please use this identifier to cite or link to this item:

http://hdl.handle.net/10453/154337