• About
  • Policies
  • What is openaccess
  • Library
  • Contact
Advanced search
      View Item 
      •   BUIR Home
      • Scholarly Publications
      • Institute of Materials Science and Nanotechnology (UNAM)
      • View Item
      •   BUIR Home
      • Scholarly Publications
      • Institute of Materials Science and Nanotechnology (UNAM)
      • View Item
      JavaScript is disabled for your browser. Some features of this site may not work without it.

      Fabrication of flexible polymer–GaN core–shell nanofibers by the combination of electrospinning and hollow cathode plasma-assisted atomic layer deposition

      Thumbnail
      View / Download
      2.4 Mb
      Author
      Ozgit Akgun, C.
      Kayaci, F.
      Vempati S.
      Haider A.
      Celebioglu A.
      Goldenberg, E.
      Kizir S.
      Uyar, Tamer
      Bıyıklı, Necmi
      Date
      2015
      Source Title
      Journal of Materials Chemistry C
      Print ISSN
      2050-7534
      Publisher
      Royal Society of Chemistry
      Volume
      3
      Issue
      20
      Pages
      5199 - 5206
      Language
      English
      Type
      Article
      Item Usage Stats
      145
      views
      142
      downloads
      Abstract
      Here we demonstrate the combination of electrospinning and hollow cathode plasma-assisted atomic layer deposition (HCPA-ALD) processes by fabricating flexible polymer-GaN organic-inorganic core-shell nanofibers at a processing temperature much lower than that needed for the preparation of conventional GaN ceramic nanofibers. Polymer-GaN organic-inorganic core-shell nanofibers fabricated by the HCPA-ALD of GaN on electrospun polymeric (nylon 6,6) nanofibers at 200 °C were characterized in detail using electron microscopy, energy dispersive X-ray analysis, selected area electron diffraction, X-ray diffraction, X-ray photoelectron spectroscopy, photoluminescence measurements, and dynamic mechanical analysis. Although transmission electron microscopy studies indicated that the process parameters should be further optimized for obtaining ultimate uniformity and conformality on these high surface area 3D substrates, the HCPA-ALD process resulted in a ∼28 nm thick polycrystalline wurtzite GaN layer on polymeric nanofibers of an average fiber diameter of ∼70 nm. Having a flexible polymeric core and low processing temperature, these core-shell semiconducting nanofibers might have the potential to substitute brittle ceramic GaN nanofibers, which have already been shown to be high performance materials for various electronic and optoelectronic applications.
      Keywords
      Atomic layer deposition
      Cathodes
      Ceramic materials
      Deposition
      Dynamic mechanical analysis
      Electrodes
      Electron diffraction
      Electron microscopy
      Electron sources
      Electrospinning
      Energy dispersive X ray analysis
      Gallium nitride
      Nanofibers
      Polymers
      Processing
      Pulsed laser deposition
      Shells (structures)
      Spinning (fibers)
      Temperature
      Transmission electron microscopy
      X ray analysis
      X ray diffraction
      Zinc sulfide
      Average fiber diameters
      High performance material
      Low processing temperature
      Optoelectronic applications
      Photoluminescence measurements
      Polycrystalline wurtzite
      Processing temperature
      Selected area electron diffraction
      X ray photoelectron spectroscopy
      Permalink
      http://hdl.handle.net/11693/21870
      Published Version (Please cite this version)
      http://dx.doi.org/10.1039/c5tc00343a
      Collections
      • Institute of Materials Science and Nanotechnology (UNAM) 1775
      • Nanotechnology Research Center (NANOTAM) 1006
      Show full item record

      Related items

      Showing items related by title, author, creator and subject.

      • Thumbnail

        Imaging capability of pseudomorphic high electron mobility transistors, AlGaN/GaN, and Si micro-Hall probes for scanning Hall probe microscopy between 25 and 125 °c 

        Akram, R.; Dede, M.; Oral, A. (American Vacuum Society, 2009)
        The authors present a comparative study on imaging capabilities of three different micro-Hall probe sensors fabricated from narrow and wide band gap semiconductors for scanning hall probe microscopy at variable temperatures. ...
      • Thumbnail

        Dynamical screening effects in hot-electron scattering from electron-hole plasma and LO-phonon modes in quantum wires 

        Bennett, C. R.; Tanatar, Bilal; Constantinou, N. C. (Elsevier, 1996)
        We present a fully dynamical and finite temperature study of the hot-electron momentum relaxation rate and the power loss in a coupled system of electron-hole plasma and bulk LO-phonons in a quantum wire structure. ...
      • Thumbnail

        Simultaneous photoinduced electron transfer and photoinduced CuAAC processes for antibacterial thermosets 

        Oz, E.; Uyar, T.; Esen, H.; Tasdelen, M. A. (Elsevier, 2017)
        A combination of simultaneous photoinduced electron transfer and photoinduced CuAAC processes enables the in-situ preparation of antibacterial thermosets containing silver nanoparticles (AgNPs) in one-pot. Upon photolysis ...

      Browse

      All of BUIRCommunities & CollectionsTitlesAuthorsAdvisorsBy Issue DateKeywordsTypeDepartmentsThis CollectionTitlesAuthorsAdvisorsBy Issue DateKeywordsTypeDepartments

      My Account

      Login

      Statistics

      View Usage StatisticsView Google Analytics Statistics

      Bilkent University

      If you have trouble accessing this page and need to request an alternate format, contact the site administrator. Phone: (312) 290 1771
      Copyright © Bilkent University - Library IT

      Contact Us | Send Feedback | Off-Campus Access | Admin | Privacy