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- Size and Shape Dependence of Organo-Interconnected Silsesquioxanes through Hydrolysis-Condensation Reaction Conditions: Nanotubes, Spheres and Films doi link

Auteur(s): Bantignies J.-L., Pichon Benoît, Dieudonne-George P., Wong Chi Man Michel, Bied Catherine, Sauvajol J.-L., J. E. Moreau Joël

(Article) Publié: Advanced Functional Materials, vol. 17 p.2349-2355 (2007)
Texte intégral en Openaccess : istex


Ref HAL: hal-00179897_v1
DOI: 10.1002/adfm.200600670
WoS: 000250018800013
Exporter : BibTex | endNote
31 Citations
Résumé:

A tris-silylated urea-based compound, 1,3,5-tris(triethoxysilylpropylureido)benzene has been synthesized. Hybrids materials with different shapes (films, spheres and tubes) are obtained upon base-catalyzed hydrolytic condensation of this compound. A self-templating process is demonstrated using electron microscopy (SEM and TEM) and X-ray diffraction (SAXS and WAXS) techniques. We show the formation of nanometer size hollow tubes according to the size of the self-templating crystalline precursor. The possibility for this self-templating to occur is due to a favored dissolution of the self-assembled molecules of the precursor in a preferential direction parallel to the cross-section of the crystals