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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Costacurta, Stefano
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (6/6 displayed)
- 2011Fabrication of functional nanostructured coatings by a combined sol-gel and plasma-enhanced chemical vapour deposition methodcitations
- 2008Fabrication of mesoporous functionalized arrays by integrating deep X-ray lithography with dip-pen writingcitations
- 2007Time-resolved simultaneous detection of structural and chemical changes during self-assembly of mesostructured filmscitations
- 2007Highly ordered self-assembled mesostructured membranescitations
- 2005Thermal-induced phase transitions in self-assembled mesostructured films studied by small-angle X-ray scatteringcitations
- 2005Highly ordered "defect-free" self-assembled hybrid films with a tetragonal mesostructurecitations
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article
Thermal-induced phase transitions in self-assembled mesostructured films studied by small-angle X-ray scattering
Abstract
<p>Two examples of phase transition in self-assembled mesostructured hybrid thin films are reported. The materials have been synthesized using tetraethoxysilane as the silica source hydrolyzed with or without the addition of methyltriethoxysilane. The combined use of transmission electron microscopy, small-angle X-ray scattering and computer simulation has been introduced to achieve a clear identification of the organized phases. A structural study of the self-assembled mesophases as a function of thermal treatment has allowed the overall phase transition to be followed. The initial symmetries of mesophases in as-deposited films have been linked to those observed in samples after thermal treatment. The monodimensional shrinkage of silica films during calcination has induced a phase transition from face-centered orthorhombic to body-centered cubic. In hybrid films, instead, the phase transition has not involved a change in the unit cell but a contraction of the cell parameter normal to the substrate.</p>