Light-induced deformation of photoresponsive liquid crystals on a water surface

Kunihiko Okano, Masato Shinohara, Takashi Yamashita

Research output: Contribution to journalArticlepeer-review

9 Citations (Scopus)


The photoinduced deformative behavior of liquid crystals (LCs) composed of an azobenzene chromophore was demonstrated. An azobenzene derivative having a LC phase at room-temperature was used for the study to induce the macroscopic deformation of a LC at ambient temperature. Polarizing optical microscopy (POM) analysis was carried out for all compounds, which showed characteristic schlieren textures of a nematic (N) phase. A LC droplet was placed on the water surface and then irradiated UV light to induce trans-cis photoisomerization to examine the photoinduced deformation of the LC. It was found that a photochemical process accelerated expansion and condensation behavior in pure azobenzene LC materials. The photo-deformation demonstrated in the study provided an understanding of the relationship between interface phenomena and photoinduced alignment change in LC materials.

Original languageEnglish
Pages (from-to)3657-3660
Number of pages4
JournalChemistry - A European Journal
Issue number15
Publication statusPublished - 2009 Apr 6
Externally publishedYes


  • Azobenzenes
  • Light-induced deformation
  • Liquid crystals
  • Photochemistry
  • Photoisomerization

ASJC Scopus subject areas

  • Catalysis
  • Organic Chemistry


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