Financial support by the Deutsche Forschungsgemeinschaft, Collaborative Research Center (Sonderforschungsbereich) 481, project B2, is gratefully acknowledged. We would also like to acknowledge the National Science Foundation for support of this work through grants DMR-0208825 and NIRT-0103297.
Control and Suppression of Surface Relief Gratings in Liquid-Crystalline Perfluoroalkyl–Azobenzene Polymers†
Article first published online: 3 JUL 2006
Copyright © 2006 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
Advanced Functional Materials
Volume 16, Issue 12, pages 1577–1581, August, 2006
How to Cite
You, F., Paik, M. Y., Häckel, M., Kador, L., Kropp, D., Schmidt, H.-W. and Ober, C. K. (2006), Control and Suppression of Surface Relief Gratings in Liquid-Crystalline Perfluoroalkyl–Azobenzene Polymers. Adv. Funct. Mater., 16: 1577–1581. doi: 10.1002/adfm.200500711
- Issue published online: 25 JUL 2006
- Article first published online: 3 JUL 2006
- Manuscript Accepted: 21 DEC 2005
- Manuscript Received: 11 OCT 2005
- Deutsche Forschungsgemeinschaft, Collaborative Research Center (Sonderforschungsbereich) 481, project B2
- National Science Foundation. Grant Numbers: DMR-0208825, NIRT-0103297
- Polymers, liquid crystalline;
Semifluorinated azobenzene liquid-crystalline side-chain polymers with different perfluoroalkyl lengths are used to develop surface relief gratings (SRGs). With sufficient fluorinated side-chain lengths, surface relief gratings could be completely suppressed due to the self-assembled liquid-crystalline order at the surface. This indicates that there is a surface-dependent nature to SRG formation. The SRG formation from the semifluorinated azobenzene liquid-crystalline side-chain polymers is compared to methoxy-terminated azobenzene side-chain polymers, and results show that the perfluoroalkyl–azobenzene polymers require a longer formation time than the methoxy-terminated polymers.