Near-infrared light activated persistent luminescence nanoparticles via upconversion

Zhanjun Li, Ling Huang, Yuanwei Zhang, Yang Zhao, Hong Yang, Gang Han

Research output: Contribution to journalArticlepeer-review

34 Scopus citations

Abstract

Persistent luminescence nanoparticles (PLNPs) and upconversion nanoparticles (UCNPs) are two special optical imaging nanoprobes. In this study, efficient upconverted persistent luminescence (UCPL) is realized by combining their unique features into polymethyl methacrylate, forming a film composed of both PLNPs and UCNPs. The red persistent luminescence (~640 nm) of the PLNPs (CaS:Eu,Tm,Ce) can be activated by upconverted green emission of UCNPs (β-NaYF4:Yb,Er@NaYF4) excited by near-infrared light (NIR). Using this strategy, both the unique optical properties of PLNPs and UCNPs can be optimally synergized, thus generating efficient upconversion, photoluminescence, and UCPL simultaneously. The UCPL system has potential applications in in vivo bioimaging by simply monitoring the biocompatible low power density of NIR-light-excited persistent luminescence. Due to its simplicity, we anticipate that this method for the preparation of UCPL composite can be easily adjusted using other available upconversion and persistent phosphor pairs for a number of biophotonic and photonic applications. [Figure not available: see fulltext.]

Original languageEnglish (US)
Pages (from-to)1840-1846
Number of pages7
JournalNano Research
Volume10
Issue number5
DOIs
StatePublished - May 1 2017
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics
  • Materials Science(all)
  • Condensed Matter Physics
  • Electrical and Electronic Engineering

Keywords

  • imaging
  • nanoparticles
  • persistent luminescence
  • upconversion

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