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      Non-radiative resonance energy transfer in bi-polymer nanoparticles of fluorescent conjugated polymers

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      Author
      Ozel I.O.
      Ozel, T.
      Demir, Hilmi Volkan
      Tuncel, D.
      Date
      2010
      Source Title
      Optics Express
      Print ISSN
      10944087
      Publisher
      Optical Society of American (OSA)
      Volume
      18
      Issue
      2
      Pages
      670 - 684
      Language
      English
      Type
      Article
      Item Usage Stats
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      107
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      Abstract
      This work demonstrates the comparative studies of non-radiative resonance energy transfer in bi-polymer nanoparticles based on fluorescent conjugated polymers. For this purpose, poly[(9,9-dihexylfluorene) (PF) as a donor (D) and poly[2-methoxy-5-(2'-ethyl-hexyloxy)-1,4-phenylene vinylene] (MEH-PPV) as an acceptor (A) have been utilized, from which four different bi-polymer nanoparticle systems are designed and synthesized. Both, steady-state fluorescence spectra and time-resolved fluorescence measurements indicate varying energy transfer efficiencies from the host polymer PF to the acceptor polymer MEH-PPV depending on the D-A distances and structural properties of the nanoparticles. The first approach involves the preparation of PF and MEH-PPV nanoparticles separately and mixing them at a certain ratio. In the second approach, first PF and MEH-PPV solutions are mixed prior to nanoparticle formation and then nanoparticles are prepared from the mixture. Third and fourth approaches involve the sequential nanoparticle preparation. In the former, nanoparticles are prepared to have PF as a core and MEH-PPV as a shell. The latter is the reverse of the third in which the core is MEH-PPV and the shell is PF. The highest energy transfer efficiency recorded to be 35% is obtained from the last system, in which a PF layer is sequentially formed on MEH-PPV NPs. © 2010 Optical Society of America.
      Keywords
      Conjugated polymers
      Energy transfer
      Fluorescence
      Organic polymers
      Resonance
      Comparative studies
      Energy transfer efficiency
      Fluorescent conjugated polymers
      Host polymers
      MEH-PPV
      Methoxy
      Nanoparticle formation
      Non-radiative
      Polymer nanoparticles
      Resonance energy transfer
      Steady-state fluorescence
      Time-resolved fluorescence measurements
      Nanoparticles
      fluorescent dye
      nanoparticle
      polymer
      article
      chemistry
      fluorescence resonance energy transfer
      materials testing
      methodology
      ultrastructure
      Fluorescence Resonance Energy Transfer
      Fluorescent Dyes
      Materials Testing
      Nanoparticles
      Polymers
      Permalink
      http://hdl.handle.net/11693/22457
      Published Version (Please cite this version)
      http://dx.doi.org/10.1364/OE.18.000670
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      • Department of Physics 2329
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