Induction of pH Sensitivity on the Fluorescence Lifetime of Quantum Dots by NIR Fluorescent Dyes

Induction of pH Sensitivity on the Fluorescence Lifetime of Quantum Dots by NIR Fluorescent Dyes

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 an...

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Veröffentlicht in:Journal of the American Chemical Society 2012-03, Vol.134 (10), p.4545-4548
Hauptverfasser: Tang, Rui, Lee, Hyeran, Achilefu, Samuel
Format: Artikel
Sprache:eng
Schlagworte:
Fluorescence
Fluorescence Resonance Energy Transfer
Fluorescent Dyes - chemistry
Hydrogen-Ion Concentration
Microscopy, Electron, Transmission
Quantum Dots
Spectrophotometry, Ultraviolet
Spectroscopy, Near-Infrared - methods
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Zusammenfassung: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
ISSN:0002-7863
1520-5126
DOI:10.1021/ja300276s