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Applied Physics A

, Volume 116, Issue 4, pp 1867–1875 | Cite as

Investigation of the spontaneous emission rate of perylene dye molecules encapsulated into three-dimensional nanofibers via FLIM method

  • Sabriye Acikgoz
  • Mustafa M. Demir
  • Ece Yapasan
  • Alper Kiraz
  • Ahmet A. Unal
  • M. Naci Inci
Article

Abstract

The decay dynamics of perylene dye molecules encapsulated in polymer nanofibers produced by electrospinning of polymethyl methacrylate are investigated using a confocal fluorescence lifetime imaging microscopy technique. Time-resolved experiments show that the fluorescence lifetime of perylene dye molecules is enhanced when the dye molecules are encapsulated in a three-dimensional photonic environment. It is hard to produce a sustainable host with exactly the same dimensions all the time during fabrication to accommodate dye molecules for enhancement of spontaneous emission rate. The electrospinning method allows us to have a control over fiber diameter. It is observed that the wavelength of monomer excitation of perylene dye molecules is too short to cause enhancement within nanofiber photonic environment of 330 nm diameters. However, when these nanofibers are doped with more concentrated perylene, in addition to monomer excitation, an excimer excitation is generated. This causes observation of the Purcell effect in the three-dimensional nanocylindrical photonic fiber geometry.

Keywords

PMMA Fluorescence Lifetime Perylene Whisper Gallery Mode Average Fiber Diameter 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Notes

Acknowledgments

This work was supported by TUBITAK under contract number 106T011, Bogazici University and Karamanoğlu Mehmetbey Universities Research Funds under contract numbers 13B03P4 and 01-M-13, respectively.

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Copyright information

© Springer-Verlag Berlin Heidelberg 2014

Authors and Affiliations

  • Sabriye Acikgoz
    • 1
    • 2
  • Mustafa M. Demir
    • 3
  • Ece Yapasan
    • 4
  • Alper Kiraz
    • 5
  • Ahmet A. Unal
    • 6
  • M. Naci Inci
    • 1
  1. 1.Department of PhysicsBogazici UniversityIstanbulTurkey
  2. 2.Department of Material Science and EngineeringKaramanoğlu Mehmetbey UniversityKaramanTurkey
  3. 3.Department of Materials Science and EngineeringIzmir Institute of TechnologyIzmirTurkey
  4. 4.Department of ChemistryIzmir Institute of TechnologyIzmirTurkey
  5. 5.Department of PhysicsKoc UniversityIstanbulTurkey
  6. 6.Helmholtz-Zentrum Berlin für Materialien und EnergieBerlinGermany

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