Electrospinning: A facile method to disperse fluorescent quantum dots in nanofibers without förster resonance energy transfer

Minjie Li, Junhu Zhang, Hao Zhang, Yifei Liu, Chunlei Wang, Xiang Xu, Yue Tang, Bai Yang

Research output: Contribution to journalArticlepeer-review

Abstract

Fluorescent CdTe quantum dots (QDs) can be dispersed into polyvinyl alcohol) (PVA) solid nanofibers by electrospinning of a QD-PVA blend solution. Although solution blending methods usually cause phase separation as the solvent evaporates; here, attractively, the QDs do not aggregate, on the contrary, they attain a separation and distribution in the PVA matrix that is as good and uniform as that in solution. Consequently, Förster resonance energy transfer (FRET) between QDs is efficiently avoided, leading to the good preservation of the original fluorescence properties of QDs even when multi-color QDs are incorporated. Thus, the emission color of the solid nanofibers can be well predicted from the electrospinning solution. Further investigation reveals that the fast evaporation rate of the solvent in the electrospinning process lies at the basts of the uniform distribution of the QDs. Because of the quick "freezing" of the polymer chains, the CdTe QDs are confined to their places with no time to aggregate.

Original languageEnglish (US)
Pages (from-to)3650-3656
Number of pages7
JournalAdvanced Functional Materials
Volume17
Issue number17
DOIs
StatePublished - Nov 23 2007
Externally publishedYes

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics

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