F. You, M. Y. Paik, M. Häckel, L. Kador, D. Kropp, H.-W. Schmidt and C. K. Ober Control and Suppression of Surface Relief Gratings in Liquid-Crystalline Perfluoroalkyl–Azobenzene Polymers Advanced Functional Materials 16
Surface relief gratings (SRGs, figure right) have been developed using semifluorinated azobenzene liquid-crystalline side-chain polymers (figure left) with different perfluoroalkyl lengths. Sufficient length of the fluorinated side-chains causes complete suppression of the SRGs, owing to self-assembled liquid-crystalline order at the surface. This indicates the surface-dependent nature of SRG formation.
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