Induction of pH sensitivity on the fluorescence lifetime of quantum dots by NIR fluorescent dyes

Rui Tang, Hyeran Lee, Samuel Achilefu

Research output: Contribution to journalArticlepeer-review

71 Scopus citations

Abstract

Modulation of the fluorescence lifetime (FLT) of CdTeSe/ZnS quantum dots (QDs) by near-IR (NIR) organic chromophores represents a new strategy for generating reproducible pH-sensing nanomaterials. The hybrid construct transfers the pH sensitivity of photolabile NIR cyanine dyes to highly emissive and long-lifetime pH-insensitive QDs, thereby inducing a reproducible FLT change from 29 ns at pH >7 to 12 ns at pH <5. This approach provides an unparalleled large dynamic FLT range for pH sensing at NIR wavelengths.

Original languageEnglish (US)
Pages (from-to)4545-4548
Number of pages4
JournalJournal of the American Chemical Society
Volume134
Issue number10
DOIs
StatePublished - Mar 14 2012
Externally publishedYes

ASJC Scopus subject areas

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

Fingerprint

Dive into the research topics of 'Induction of pH sensitivity on the fluorescence lifetime of quantum dots by NIR fluorescent dyes'. Together they form a unique fingerprint.

Cite this