Toward White Light Emission through Efficient Two-Step Energy Transfer in Hybrid Nanofibers

Nanosized zeolite L crystals containing about 550 strongly luminescent acceptor molecules have been modified by grafting a conjugated oligomer on their external surface. The 25 nm sized crystals have consequently been embedded in polymeric nanofibers obtained by electrospinning. The fluorescent mole...

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Bibliographic Details
Published in:ACS nano 2010-03, Vol.4 (3), p.1409-1416
Main Authors: Vohra, Varun, Calzaferri, Gion, Destri, Silvia, Pasini, Mariacecilia, Porzio, William, Botta, Chiara
Format: Article
Language:English
Subjects:
Color
Coloring Agents - chemistry
Energy Transfer
Fluorescence Resonance Energy Transfer
Light
Models, Molecular
Molecular Conformation
Nanofibers - chemistry
Polymers - chemistry
Zeolites - chemistry
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Summary:Nanosized zeolite L crystals containing about 550 strongly luminescent acceptor molecules have been modified by grafting a conjugated oligomer on their external surface. The 25 nm sized crystals have consequently been embedded in polymeric nanofibers obtained by electrospinning. The fluorescent molecule grafted on the external surface allows addressing the guests in the zeolite nanochannels through an efficient two-step energy transfer from the polymer nanofiber. The so obtained hybrid nanofibers exhibit intense emissions from the three fundamental colors using a single excitation wavelength. The molecule grafted on the external surface of the nanocrystal also induces a higher compatibility of the hybrid organic/inorganic nanomaterials in the conjugated polymer and therefore high concentrations of zeolites embedded in the nanofibers are obtained. Playing on this concentration, the emission of the nanofiber can be tuned and eventually be used for fabricating white-light emitting nanofibers. This hybrid nanomaterial opens new perspectives for low-cost nano organic light emitting diodes fabrication with considerable impact on the lighting and display technologies.
ISSN:1936-0851
1936-086X
DOI:10.1021/nn9017922