Liquid-crystalline polymer with a block mesogenic side group: photoinduced manipulation of nanophase-separated structures

Kunihiko Okano, Yasuyuki Mikami, Takashi Yamashita

Research output: Contribution to journalArticle

18 Citations (Scopus)

Abstract

In this report, a novel type of photoresponsive liquid crystalline polymer with a block mesogenic side-group is demonstrated. The block mesogene is an amphipathic molecule containing a hydrophobic mesogene (azotolane moiety) and hydrophilic oligooxyethylene moieties in the same unit. The block mesogene in the polymer plays a role in liquid crystalline, amphiphilic and photoresponsive properties. As expected, a film prepared from the polymer exhibits phase separation of a lamellar structure due to cooperative motion between liquid crystal assembly and nanophase separation. The morphology of the lamellae can be aligned upon irradiation of linearly polarized light Moreover, a photochemical phase transition induced by unpolarized UV irradiation erases the surface morphology. The erased nanostructure can be recovered by annealing or irradiation of linearly polarized light, meaning that the surface morphology is rewritable via a photochemical process.

Original languageEnglish
Pages (from-to)3804-3808
Number of pages5
JournalAdvanced Functional Materials
Volume19
Issue number23
DOIs
Publication statusPublished - 2009 Sep 12

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ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics

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