Accurate Control of Core–Shell Upconversion Nanoparticles through Anisotropic Strain Engineering

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journal

3 Scopus Citations
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Author(s)

  • Bing Chen
  • Xue Luo
  • Weiwei Zhang
  • Changjian Wang
  • Jun Lin
  • Dong Su
  • Xvsheng Qiao

Detail(s)

Original languageEnglish
Article number1903295
Journal / PublicationAdvanced Functional Materials
Volume29
Issue number44
Online published27 Aug 2019
Publication statusPublished - 1 Nov 2019

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; Luo, Xue; Sun, Tianying; Zhang, Weiwei; Wang, Changjian; Lin, Jun; Su, Dong; Qiao, Xvsheng; Wang, Feng.

In: Advanced Functional Materials, Vol. 29, No. 44, 1903295, 01.11.2019.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journal