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Engineering Three Dimensional Nanotextured Opal-Like Silica Foams

Published online by Cambridge University Press:  26 February 2011

Florent Carn ,
Pascal Massé ,
Serge Ravaine  and
Rénal Backov
Florent Carn
Affiliation:
carn@crpp-bordeaux.cnrs.fr, CNRS, Centre de Recherche Paul Pascal, Avenue Albert Schweitzer, PESSAC, Bordeaux, 33600, France, Metropolitan
Pascal Massé
Affiliation:
masse@crpp-bordeaux.cnrs.fr
Serge Ravaine
Affiliation:
ravaine@crpp-bordeaux.cnrs.fr
Rénal Backov
Affiliation:
backov@crpp-bordeaux.cnrs.fr
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Abstract

Novel meso-/macroporous SiO2 monoliths have been reached by applying a nanotectonic pathway within a confined geometry, i.e. a non-static air-liquid foam patterning process. Final scaffolds are a very close transcription of the tailored periodic air-liquid foam template while coalesced silica particles are texturing the as-synthesized foam walls. The interconnected nanoparticles and associated void space between adjacent particles allow generating intrinsic mesopores, thereby defining hierarchically organized porous scaffolds. The good control over both the air-liquid foam’s water volume fraction and the bubble size allow a rational tuning of the macropore shape (diameter, Plateau border’s width). In contrast with previous study, closed-cell structures can be reached, while the opal like scaffold structure is maintained with thermal treatment, avoiding thus strong shrinkage associated to the sintering effect.

Keywords

cellular (material type)foamsol-gel
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 901: Symposium R – Assembly at the Nanoscale – Toward Functional Nanostructured Materials , 2005 , 0901-Ra22-20-Rb22-20
Copyright
Copyright © Materials Research Society 2006

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