Fabrication of flexible polymer–GaN core–shell nanofibers by the combination of electrospinning and hollow cathode plasma-assisted atomic layer deposition
Author
Ozgit Akgun, C.
Kayaci, F.
Vempati S.
Haider A.
Celebioglu A.
Goldenberg, E.
Kizir S.
Uyar, Tamer
Bıyıklı, Necmi
Date
2015Source 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
ArticleItem Usage Stats
145
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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 depositionCathodes
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/11693/21870Published Version (Please cite this version)
http://dx.doi.org/10.1039/c5tc00343aCollections
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