Structural study of 3D-hexagonal mesoporous spin-coated sol-gel films

被引:91
作者
Besson, S
Gacoin, T
Jacquiod, C
Ricolleau, C
Babonneau, D
Boilot, JP [1 ]
机构
[1] Ecole Polytech, Phys Mat Condensee Lab, Grp Chim Solide, UMR CNRS 7643, F-91128 Palaiseau, France
[2] Lab CNRS St Gobain Surface Verre & Interfaces, UMR CNRS 125, F-93303 Aubervilliers, France
[3] Univ Paris 06, Lab Mineral Cristallog, UMR CNRS 7590, F-75252 Paris 05, France
[4] Univ Paris 07, Lab Mineral Cristallog, UMR CNRS 7590, F-75252 Paris 05, France
[5] Univ Poitiers, UFR Sci SP2MI, Met Phys Lab, UMR CNRS 6630, F-86962 Futuroscope, France
关键词
D O I
10.1039/a908845h
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Mesostructured films deposited on glass substrates by spin coating are studied by X-ray diffraction, small angle X-ray scattering using grazing incidence (GISAXS) and high resolution electron microscopy. The films generally present a gradient of ordering from the air/sol interface to the interior of the film, with a 3D-hexagonal mesophase near the surface and a disordered micellar structure at the interior. However, the 3D-hexagonal ordering and the texturing can be extended over all the film thickness by adjusting the composition of the deposited solution. In particular, critical values are clearly observed both for the size of silica units forming the walls in the mesophase and for the film thickness. All these results can be understood from the competition between structuration and gelation of the films during alcohol removal.
引用
收藏
页码:1331 / 1336
页数:6
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