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Poster (Scientific congresses and symposiums)
ZnO/PVA Macroscopic Fibers Bearing Anisotropic Photonic Properties
Kinadjian, Natacha; Achard, Marie-France; Julian-Lopez, Beatriz et al.
2012MRS Fall Meeting 2012
 

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Abstract :
[en] Composite PVA/ZnO-nanorods fibers, synthesized through co-axial flux extrusion exhibit higher anisotropic photonic properties, both in absorption and emission, as a result of the collective alignment of the ZnO nanorods along the main axis of the PVA fiber. This photonic anisotropy is triggered by a synergistic interaction between the PVA matrix, stretched above the glass transition temperature (Tg), and cooled down under strain. Compared with non-elongated fibers that present an isotropic emission, composite fibers previously submitted to a tensile stress absorb selectively UV emission when the polarized laser beam is parallel to the main axis of the fiber. In addition, their photolumincescence is also anisotropic, with a waveguide behavior along the main axis of the fiber. Mechanical properties of these composite fibers are also drastically improved, compared with pure PVA fibers: the longitudinal Young modulus of these fibers is increased from 2 to 6 GPa upon ZnO addition, a value similar to those already observed for composite fibers, prepared either with carbon nanotubes, or V2O5 macroscopic fibers.
Disciplines :
Physical, chemical, mathematical & earth Sciences: Multidisciplinary, general & others
Author, co-author :
Kinadjian, Natacha ;  Université de Liège - ULiège > Doct. sc. (chimie - Bologne)
Achard, Marie-France
Julian-Lopez, Beatriz
Maugey, Maryse
Poulin, Philippe
Prouzet, Eric
Backov, Rénal
Language :
English
Title :
ZnO/PVA Macroscopic Fibers Bearing Anisotropic Photonic Properties
Publication date :
25 November 2012
Event name :
MRS Fall Meeting 2012
Event date :
25 novembre 2012 au 30 novembre 2012
Audience :
International
Available on ORBi :
since 20 August 2013

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