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      Photoluminescent electrospun polymeric nanofibers incorporating germanium nanocrystals

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      Author
      Ortaç, B.
      Kayaci, F.
      Vural, H. A.
      Deniz, A. E.
      Uyar, Tamer
      Date
      2013
      Source Title
      Reactive and Functional Polymers
      Print ISSN
      1381-5148
      Publisher
      Elsevier
      Volume
      73
      Issue
      9
      Pages
      1262 - 1267
      Language
      English
      Type
      Article
      Item Usage Stats
      141
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      107
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      Abstract
      The photoluminescent germanium nanocrystals (Ge-NCs) were successfully incorporated into electrospun polymeric nanofiber matrix in order to develop photoluminescent nanofibrous composite web. In the first step, the synthesis of Ge-NCs was achieved by nanosecond pulsed laser ablation of bulk germanium wafer immersed in organic liquid. The size, the structural and the chemical characteristics of Ge-NCs investigated by TEM, XPS, XRD and Raman spectroscopy revealed that the Ge-NCs were highly pure and highly crystalline having spherical shape within 3-20 nm particle size distribution. In the second step, Ge-NCs were mixed with polyvinyl alcohol (PVA) polymer solution, and then, Ge-NC/PVA nanofibers were obtained via electrospinning technique. The electrospinning of Ge-NCs/PVA nanoweb composite structure was successful and bead-free Ge-NCs/PVA nanofibers having average fiber diameter of 185 ± 40 nm were obtained. The STEM analysis of the electrospun Ge-NCs/PVA nanofibers elucidated that the Ge-NCs were distributed homogeneously in the polymeric nanofiber matrix. The UV-Vis absorption and photoluminescence spectroscopy studies indicated the quantum confinement effect of Ge-NCs on the optical properties of the electrospun Ge-NCs/PVA nanoweb. © 2013 Elsevier Ltd. All rights reserved.
      Keywords
      Electrospinning
      Nanofiber
      Germanium nanocrystals
      Optical properties
      Polymers
      Permalink
      http://hdl.handle.net/11693/20758
      Published Version (Please cite this version)
      http://dx.doi.org/10.1016/j.reactfunctpolym.2013.06.007
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