ZnO/PVA Macroscopic Fibers Bearing Anisotropic Photonic Properties
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Otros documentos de la autoría: Julian-Lopez, Beatriz; Kinadjian, Natacha; Achard, Marie-France; Maugey, Marisse; Poulin, Philippe; Prouzet, Eric; Backov, Rénal
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http://dx.doi.org/10.1002/adfm.201200360 |
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Título
ZnO/PVA Macroscopic Fibers Bearing Anisotropic Photonic PropertiesAutoría
Fecha de publicación
2012-10Editor
Wiley-VCHTipo de documento
info:eu-repo/semantics/articlePalabras clave / Materias
Resumen
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 ... [+]
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. [-]
Publicado en
Advanced Functional Materials, Volume 22, Issue 19 (2012)Derechos de acceso
http://rightsstatements.org/vocab/CNE/1.0/
info:eu-repo/semantics/restrictedAccess
info:eu-repo/semantics/restrictedAccess
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