Elimination of photon quenching by a transition layer to fabricate a quenching-shield sandwich structure for 800 nm excited upconversion luminescence of Nd3+-sensitized nanoparticles

Adv Mater. 2014 May;26(18):2831-7. doi: 10.1002/adma.201304903. Epub 2013 Dec 12.

Abstract

Nd3+-sensitized quenching-shield sandwich-structured upconversion nanoparticles are reported, which exhibit highly efficient upconversion photoluminescence under excitation by an 800 nm continuous-wave laser. The transition-layer structure is essential to bridge energy transfer from the sensitizer to the activator and simultaneously block energy back-transfer from the activator to the sensitizer. These 800 nm-excited upconversion nanoparticles are a key step toward the development of upconversion nanophosphors for biological applications.

Keywords: excitation; quenching effects; quenching-shield sandwich structures; transition layers; upconversion.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Biocompatible Materials / chemical synthesis*
  • Biocompatible Materials / radiation effects
  • Crystallization / methods
  • Energy Transfer
  • Fluorescence Resonance Energy Transfer / methods*
  • Light
  • Luminescent Measurements / methods*
  • Materials Testing
  • Metal Nanoparticles / chemistry*
  • Metal Nanoparticles / radiation effects*
  • Metal Nanoparticles / ultrastructure
  • Neodymium / chemistry*
  • Neodymium / radiation effects*
  • Particle Size
  • Photons

Substances

  • Biocompatible Materials
  • Neodymium