Thin films of bicontinuous cubic mesostructured silica templated by a nonionic surfactant

被引：53

作者：

Hayward, RC

Alberius, PCA

Kramer, EJ

Chmelka, BF ^{[1
]}

机构：

[1] Univ Calif Santa Barbara, Dept Chem Engn, Santa Barbara, CA 93106 USA

[2] Univ Calif Santa Barbara, Dept Mat, Santa Barbara, CA 93106 USA

[3] Inst Surface Chem, S-11486 Stockholm, Sweden

来源：

LANGMUIR | 2004年 / 20卷 / 14期

关键词：

D O I：

10.1021/la030442z

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Thin films of bicontinuous cubic mesostructured silica were formed using the nonionic poly(oxyethylene)alkyl ether surfactant Brij-56 as a structure-directing agent. The synthesis conditions were chosen such that the estimated volume fraction of surfactant in the silica/surfactant films corresponded approximately to the composition at which the bicontinuous cubic phase occurs in the water/surfactant phase diagram. Small-angle X-ray scattering and transmission electron microscopy measurements reveal that the cubic phase corresponds to the Ia (3) over bard double-gyroid structure, with some distortion due to anisotropic film shrinkage. The cubic structure grows as faceted domains that are well-oriented with respect to the substrate and often occur in coexistence with a lamellar phase. By adjusting the temperature at which the films are aged, it is possible to create films with 2D hexagonal, cubic, or lamellar structures at a single composition.

引用

页码：5998 / 6004

页数：7

共 80 条

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