Establishing the structural integrity of core-shell nanoparticles against elemental migration using luminescent lanthanide probes

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

44 Scopus Citations
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Author(s)

  • Bing Chen
  • Dengfeng Peng
  • Xvsheng Qiao
  • Xianping Fan

Related Research Unit(s)

Detail(s)

Original languageEnglish
Pages (from-to)12788-12790
Journal / PublicationAngewandte Chemie - International Edition
Volume54
Issue number43
Online published28 Aug 2015
Publication statusPublished - 19 Oct 2015

Abstract

Core-shell structured nanoparticles are increasingly used to host luminescent lanthanide ions but the structural integrity of these nanoparticles still lacks sufficient understanding. Herein, we present a new approach to detect the diffusion of dopant ions in core-shell nanostructures using luminescent lanthanide probes whose emission profile and luminescence lifetime are sensitive to the chemical environment. We show that dopant ions in solution-synthesized core-shell nanoparticles are firmly confined in the designed locations. However, annealing at certain temperatures (greater than circa 350°C) promotes diffusion of the dopant ions and leads to degradation of the integrity of the nanoparticles. These insights into core-shell nanostructures should enhance our ability to understand and use lanthanide-doped luminescent nanoparticles. Border control: The diffusion of dopant ions in core-shell nanostructures is detected using luminescent lanthanide probes (Ce3+ and Tb3+). Core-shell nanoparticles synthesized by a wet-chemistry route retain high structural integrity and after annealing at elevated temperatures, migration of elements across the core-shell interface is detected.

Research Area(s)

  • core-shell nanoparticles, electron microscopy, energy transfer, lanthanides, photophysics

Citation Format(s)

Establishing the structural integrity of core-shell nanoparticles against elemental migration using luminescent lanthanide probes. / Chen, Bing; Peng, Dengfeng; Chen, Xian; Qiao, Xvsheng; Fan, Xianping; Wang, Feng.

In: Angewandte Chemie - International Edition, Vol. 54, No. 43, 19.10.2015, p. 12788-12790.

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