Accurate Control of Core–Shell Upconversion Nanoparticles through Anisotropic Strain Engineering
Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review
Author(s)
Related Research Unit(s)
Detail(s)
Original language | English |
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Article number | 1903295 |
Journal / Publication | Advanced Functional Materials |
Volume | 29 |
Issue number | 44 |
Online published | 27 Aug 2019 |
Publication status | Published - 1 Nov 2019 |
Link(s)
DOI | DOI |
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Document Link | |
Link to Scopus | https://www.scopus.com/record/display.uri?eid=2-s2.0-85071651297&origin=recordpage |
Permanent Link | https://scholars.cityu.edu.hk/en/publications/publication(be2a7e62-ca9f-4f60-8c55-455b661b4f44).html |
Abstract
The effect of anisotropic interfacial strain on epitaxial growth and optical emission of sodium rare-earth fluoride core–shell nanoparticles is investigated. A variety of sodium rare-earth fluoride shells are grown on hexagonal-phase NaYF4:Yb/Er core for providing anisotropic tuning of interfacial strains. Using high-resolution transmission electron microscopy and X-ray diffraction characterizations, the correlations between the epitaxial habits and the interfacial strains are quantitatively addressed. Furthermore, the growth affinity is tuned by controlling precursor concentration in conjunction with Ca2+ doping, which results in accurate regulation of the anisotropic growth. The lattice strain resulting from mismatched epitaxy is found to enhance luminescence response of the nanoparticles to temperature change.
Research Area(s)
- core/shell nanocrystals, epitaxial growth, lanthanides, strain, upconversion
Citation Format(s)
Accurate Control of Core–Shell Upconversion Nanoparticles through Anisotropic Strain Engineering. / Zhao, Jianxiong; Chen, Xian; Chen, Bing et al.
In: Advanced Functional Materials, Vol. 29, No. 44, 1903295, 01.11.2019.
In: Advanced Functional Materials, Vol. 29, No. 44, 1903295, 01.11.2019.
Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review