Jump to main content
Jump to site search
Access to RSC content Close the message box

Continue to access RSC content when you are not at your institution. Follow our step-by-step guide.


Issue 26, 2020
Previous Article Next Article

Tuning epitaxial growth on NaYbF4 upconversion nanoparticles by strain management

Author affiliations

Abstract

Core–shell structural engineering is a common strategy for tuning upconversion luminescence in lanthanide-doped nanoparticles. However, epitaxial growth on hexagonal phase NaYbF4 nanoparticles typically suffers from incomplete shell coverage due to the large and anisotropic interfacial strain. Herein, we explore the effects of core particle size and morphology as well as reaction temperature on controlling the epitaxial growth of NaGdF4 shells on NaYbF4 nanoparticles with misfit parameters of fa = 1.58% and fl = 2.24% for axial and lateral growth, respectively. Rod-like core particles with a long length and a large diameter are found to promote shell growth with high surface coverage by facilitating the relaxation of lattice strains. Furthermore, the primary NaGdF4 shell can serve as a transition layer to mediate the growth of additional NaNdF4 coating layers that display an even larger lattice misfit with the core (fa = 2.98%; fl = 4.32%). The resultant NaYbF4@Na(Gd/Nd)F4 core–shell nanostructures simultaneously show strong multiphoton upconversion luminescence and superior magnetic resonance T1 ionic relaxivity. Our findings are important for the rational design of core–shell upconversion nanoparticles with optimized properties and functionality for technological applications.

Graphical abstract: Tuning epitaxial growth on NaYbF4 upconversion nanoparticles by strain management

Back to tab navigation

Supplementary files

Article information


Submitted
30 Apr 2020
Accepted
04 Jun 2020
First published
04 Jun 2020

Nanoscale, 2020,12, 13973-13979
Article type
Paper

Tuning epitaxial growth on NaYbF4 upconversion nanoparticles by strain management

J. Zhao, B. Chen, X. Chen, X. Zhang, T. Sun, D. Su and F. Wang, Nanoscale, 2020, 12, 13973
DOI: 10.1039/D0NR03374J

Social activity

Search articles by author

Spotlight

Advertisements