Generation of self-assembled 3D mesostructured SnO2 thin films with highly crystalline frameworks - Research portal of Justus Liebig University Giessen:

Journal article

Generation of self-assembled 3D mesostructured SnO2 thin films with highly crystalline frameworks

Authors list: Brezesinski, T; Fischer, A; Iimura, K; Sanchez, C; Grosso, D; Antonietti, M; Smarsly, BM

Publication year: 2006

Pages: 1433-1440

Journal: Advanced Functional Materials

Volume number: 16

Issue number: 11

ISSN: 1616-301X

DOI Link: https://doi.org/10.1002/adfm.200600064

Publisher: Wiley

Abstract:
Crack-free, mesoporous SnO2 films with highly crystalline pore walls are obtained by evaporation-induced self-assembly using a novel amphiphilic block-copolymer template ("KLE" type, poly(ethylene-co-butylene)-block-poly(ethylene oxide)), which leads to well-defined arrays of contracted spherical mesopores by suitable heat-treatment procedures. Because of the improved templating properties of these polymers, a facile heat-treatment procedure can be applied whilst keeping the mesoscopic order intact up to 600-650 degrees C. The formation mechanism and the mesostructural evolution are investigated. by various state-of-the-art techniques, particularly by a specially constructed 2D small-angle X-ray scattering setup. It is found that the main benefit from the polymers is the formation of an ordered mesostructure under the drastic conditions of using molecular Sn precursors (SnCl4), taking advantage of the large segregation strength of these amphiphiles. Furthermore, it is found that the crystallization mechanism is different from other mesostructured metal oxides such as TiO2. In the case of SnO2, a significant degree of crystallization (induced by heat treatment) already starts at quite low temperatures, 250-300 degrees C. Therefore, this study provides a better understanding of the general parameters governing the preparation of mesoporous metal. oxides films with crystalline pore walls.

Authors/Editors

- Uni.-Prof. Dr. Bernd Michael Smarsly

Citation Styles

Harvard Citation style: Brezesinski, T., Fischer, A., Iimura, K., Sanchez, C., Grosso, D., Antonietti, M., et al. (2006) Generation of self-assembled 3D mesostructured SnO2 thin films with highly crystalline frameworks, Advanced Functional Materials, 16(11), pp. 1433-1440. https://doi.org/10.1002/adfm.200600064

APA Citation style: Brezesinski, T., Fischer, A., Iimura, K., Sanchez, C., Grosso, D., Antonietti, M., & Smarsly, B. (2006). Generation of self-assembled 3D mesostructured SnO2 thin films with highly crystalline frameworks. Advanced Functional Materials. 16(11), 1433-1440. https://doi.org/10.1002/adfm.200600064