Excitation Modulation of Upconversion Nanoparticles for Switch-like Control of Ultraviolet Luminescence

Peter Dawson, Marek Romanowski

Research output: Contribution to journalArticle

16 Scopus citations

Abstract

The ability to control ultraviolet (UV) luminescence intensity in a switch-like manner is demonstrated through the use of 980 nm excitation pulse-width modulation in NaYF4:Yb3+,Tm3+ upconversion nanoparticles (UNPs). Varying the ytterbium doping resulted in a single order of magnitude improvement of UV luminescence intensity. The excitation pulse-width modulation technique applied to these optimized UNPs enables 3 orders of magnitude control over UV luminescence intensity while maintaining NIR luminescence emission at 800 nm. Controlled in the switch-like manner, these UNPs can transfer their UV energy to 9,10-diphenylanthracene (DPA). Independent control of NIR luminescence and UV energy transfer through NIR excitation modulation may find applications in the development of multifunctional theranostic systems.

Original languageEnglish (US)
Pages (from-to)5714-5718
Number of pages5
JournalJournal of the American Chemical Society
Volume140
Issue number17
DOIs
StatePublished - May 2 2018

ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)
  • Biochemistry
  • Colloid and Surface Chemistry

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