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Poster (Scientific congresses and symposiums)
1D Organization of ZnO and TiO2 nanoparticles toward advanced photonic and photocatalytic materials
Kinadjian, Natacha; Achard, Marie-France; Julian-Lopez, Beatriz et al.
2012NanoOntario conference 2012
 

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Abstract :
[en] Nowadays Chemist are request to construct more and more complex architectures bearing multifunctionalities enable to respond to external stimuli. The construction of such complex architectures will be addressed through strong interplay in chemical science, as proposed recently with the concept of integrative Chemistry.[1] We synthesized PVA/ZnO-nanorods composite fibers using co-axial flux extrusion.[2] These fibers 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 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 Vanadium Oxide macroscopic fibers. [1] N. Brun, S. Ungureanu, H. Deleuze and R. Backov. Chem. Soc. Rev., 2011, 40, 771 [2] Kinadjian, N., Achard, M.-F., Julián-López, B., Maugey, M., Poulin, P., Prouzet, E. and Backov, R. (2012). Adv. Funct. Mater.. doi: 10.1002/adfm.201200360
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
Le Bechec, Mickael
Pigot, Thierry
Dufour, Fabien
Durupthy, Olivier
Bentaleb, Ahmed
Lacombe, Sylvie
Prouzet, eric
Backov, Rénal
More authors (3 more) Less
Language :
English
Title :
1D Organization of ZnO and TiO2 nanoparticles toward advanced photonic and photocatalytic materials
Publication date :
October 2012
Event name :
NanoOntario conference 2012
Event place :
Canada
Event date :
du 11 octobre 2012 au 12 octobre 2012
Available on ORBi :
since 20 August 2013

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