| People | Locations | Statistics |
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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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Wiesner, Ulrich
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (19/19 displayed)
- 2019A rheometry method to assess the evaporation‐induced mechanical strength development of polymer solutions used for membrane applicationscitations
- 2019Metasurfaces Atop Metamaterials: Surface Morphology Induces Linear Dichroism in Gyroid Optical Metamaterials.
- 2018Controlling Self-Assembly in Gyroid Terpolymer Films By Solvent Vapor Annealing.
- 2018Controlling Self-Assembly in Gyroid Terpolymer Films By Solvent Vapor Annealing.
- 2017Optical Imaging of Large Gyroid Grains in Block Copolymer Templates by Confined Crystallization.
- 2014Ultrafast nonlinear response of gold gyroid three-dimensional metamaterialscitations
- 2013Towards mesoporous Keggin-type polyoxometalates-systematic study on organic template removalcitations
- 2013Enhancement of Perovskite-Based Solar Cells Employing Core–Shell Metal Nanoparticlescitations
- 2012A silica sol-gel design strategy for nanostructured metallic materialscitations
- 2012Direct synthesis of inverse hexagonally ordered diblock copolymer/polyoxometalate nanocomposite filmscitations
- 2010Nanomanufacturing of continuous composite nanofibers with confinement-induced morphologiescitations
- 2010Block copolymer directed nanoporous metal thin filmscitations
- 2009Metal nanoparticle - block copolymer composite assembly and disassemblycitations
- 2009Morphology diagram of a diblock copolymer - aluminosilicate nanoparticle systemcitations
- 2008Ordered mesoporous materials from metal nanoparticle-block copolymer self-assemblycitations
- 2008Morphology control in block copolymer/polymer derived ceramic precursor nanocompositescitations
- 2008Direct access to thermally stable and highly crystalline mesoporous transition-metal oxides with uniform porescitations
- 2004Ordered mesoporous ceramics stable up to 1500 °C from diblock copolymer mesophasescitations
- 2003Synthesis and characterization of block copolymer/ceramic precursor nanocomposites based on a polysilazanecitations
Places of action
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article
Ordered mesoporous ceramics stable up to 1500 °C from diblock copolymer mesophases
Abstract
<p>In the present study, a poly(isoprene-block-dimethylamino ethyl methacrylate) diblock copolymer (PI-b-PDMAEMA) is used to structure-direct a polysilazane pre-ceramic polymer, commercially known as Ceraset. To the polymer was added a 2-fold excess in weight of the silazane oligomer (Ceraset). The resulting composite was cast into films, and after cooperative self-assembly of block copolymer and Ceraset, the structure was permanently set in the hexagonal columnar morphology, as evidenced by small-angle X-ray scattering (SAXS) and transmission electron microscopy (TEM). Cross-linking of the silazane oligomer was achieved with a radical initiator at 120 °C. Upon heating of the composite to 1500 °C under nitrogen, the structure is preserved and a mesoporous ceramic material is obtained, as demonstrated by SAXS and TEM. The pores are open and accessible, as evidenced by nitrogen sorption/desorption measurements indicating a surface area of about 51 m<sup>2</sup> g<sup>-1</sup> and a pore diameter of 13 nm, consistent with TEM analysis. These results suggest that the use of block copolymer mesophases may provide a simple, easily controlled pathway for the preparation of various high-temperature ceramic mesostructures.</p>