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(45) Production(s) de l'année 2016
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Evaporation-Induced Self-Structuring of Organised Silica Nanohybrid Films Through Cooperative Physical and Chemical Interactions 
Auteur(s): Cojocariu Ana M., Cattoën Xavier, Le Parc R., Maurin D., Blanc C., Dieudonne-George P., Bantignies J.-L., Wong Chi Man Michel, Bartlett John R.
(Article) Publié:
Physical Chemistry Chemical Physics, vol. 18 p.7946 (2016)
Ref HAL: hal-01279551_v1
DOI: 10.1039/C5CP02742J
WoS: 000372229700039
Exporter : BibTex | endNote
4 Citations
Résumé: In this work, we develop the concept of evaporation-induced self-structuring as a novel approach forproducing organised films by exploiting cooperative physical and chemical interactions under far-fromequilibriumconditions (spin-coating), using sol–gel precursors with multiple functional groups. Thin filmsof self-structured silsesquioxane nanohybrids have been deposited by spin coating through the sol–gelhydrolysis and condensation of a bridged organosilane bearing self-assembling urea groups. The resultingnanostructure, investigated by FTIR, AFM and SEM, is shown to be highly dependent on the catalyst used(nucleophilic or acidic), and can be further modulated by varying the spinning rate. FTIR studies revealed thepresence of highly organised structures under acidic catalysis due to strong hydrogen bonding between ureagroups and hydrophobic interactions between long alkylene chains. The preferential orientation of the ureacross-links parallel to the substrate is shown using polarized FTIR experiments.
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Heterodyne holography with full control of both the signal and reference arms
Auteur(s): Gross M.
(Article) Publié:
Applied Optics, vol. 55 p.A8-A16 (2016)
Texte intégral en Openaccess : 
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Measuring enhanced optical correlations induced by transmission open channels in a slab geometry
Auteur(s): Verrier N., Depreater L, Felbacq D., Gross M.
(Article) Publié:
Physical Review B, vol. 93 p.161114 (2016)
Texte intégral en Openaccess :
Ref HAL: hal-01181347_v2
Ref Arxiv: 1507.08399
DOI: 10.1103/PhysRevB.93.161114
WoS: WOS:000374952800001
Ref. & Cit.: NASA ADS
Exporter : BibTex | endNote
5 Citations
Résumé: Due to the existence of open channels, light could theoretically be transmitted through disorderedmedia with 100% efficiency. However, because of the large number of channels to be controlledor measured, this has been never observed experimentally. To avoid this difficulty we considerobservables easier to handle experimentally. By measuring the correlations of the field transmittedthrough a disordered medium, we were able to count the number of channels involved in transmissionand to compare this number with theory. For a sample of transmission 1=25, we get a number ofmodes about 15 times smaller than for free space propagation. This figure is in good agreementwith theoretical prediction.
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