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Issue 6, 2009
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Photo-crosslinkable liquid-crystalline azo-polymer for surface relief gratings and persistent fixation

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Abstract

Highly efficient migration has been observed for soft liquid-crystalline azobenzene-containing polymer films to form surface relief gratings (SRGs). The efficient migration is probably driven by the interfacial instability at boundaries between the smectic liquid-crystalline phase and photo-induced isotropic one. However, this migration system suffers from long-term and heat stability. This work proposes a new post-fixation method by utilizing the [2 + 2] photo-dimerization reaction of a cinnamoyl unit introduced into the polymer. The polymer synthesis, the properties of SRG formation, and drastic improvement of the stability towards heating and solvent exposure are described.

Graphical abstract: Photo-crosslinkable liquid-crystalline azo-polymer for surface relief gratings and persistent fixation

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Publication details

The article was received on 05 Jan 2009, accepted on 03 Mar 2009 and first published on 06 Apr 2009


Article type: Paper
DOI: 10.1039/B900146H
Citation: New J. Chem., 2009,33, 1343-1348
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    Photo-crosslinkable liquid-crystalline azo-polymer for surface relief gratings and persistent fixation

    W. Li, S. Nagano and T. Seki, New J. Chem., 2009, 33, 1343
    DOI: 10.1039/B900146H

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