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General Routes to Microporous Thin Films: Formation of Organic-Inorganic Network

Published online by Cambridge University Press:  10 February 2011

Y. Yan ,
Y. Hoshino ,
Z. Duan ,
S. Ray Chaudhuri  and
A. Sarkar
Y. Yan
Affiliation:
YTC America Inc. 550 Via Alondra, Camarillo, California 93012.
Y. Hoshino
Affiliation:
YTC America Inc. 550 Via Alondra, Camarillo, California 93012.
Z. Duan
Affiliation:
YTC America Inc. 550 Via Alondra, Camarillo, California 93012.
S. Ray Chaudhuri
Affiliation:
YTC America Inc. 550 Via Alondra, Camarillo, California 93012.
A. Sarkar
Affiliation:
YTC America Inc. 550 Via Alondra, Camarillo, California 93012.
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Abstract

It has been found that inorganic thin films, prepared via sol-gel route, are nonporous or much less porous than bulk gel derived from the same precursor solutions, because of the overlap of rigorous solvent evaporation with continuing condensation during the process of film deposition. The synthetic strategy of this work is to control the condensation reaction by incorporation of terminal ligands through the formation of organic-inorganic network at molecular scales on the thin film coatings. Depending on the nature of the organic groups, the hybrid film can be designed with micropores close to the kinetic diameter of nitrogen as indicated by sorption isotherms and kinetics. The incorporation of the organic groups also renders the porous films with a more hydrophobic surface. AFM, 13C and 29Si MAS/NMR and FTIR data also qualitatively support the proposed microstructures of the hybrid materials.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 435: Symposium V – Better Ceramics Through Chemistry VII , 1996 , 307
Copyright
Copyright © Materials Research Society 1996

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