Depth-selective microscopic observation of a photomobile liquid crystal polymer under UV illumination

Kenji Katayama, Youngwoon Choi, Jeon Woong Kang, Zahid Yaqoob, Peter T.C. So, Tomomi Fujii, Shota Kuwahara, Kiyohide Takado, Tomiki Ikeda

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Abstract

By using the depth selective imaging method, we studied the UV induced change in a photomobile liquid crystalline polymer film. With 1 µm depth resolution, each slice inside the film was selectively observed. A network-like structure mixed with the ordered and disordered regions of molecules in the middle of the film, and a rubbed polymer layer at the bottom of the film were observed. In each slice of the film, the phase change induced by UV light was observed strongly dependent on the director direction, which indicates the ordering change of the liquid crystalline molecules in the director direction. It took several tens of seconds for the ordering change caused by the collaborative interaction between the molecules. Furthermore, it was suggested that the UV induced change travelled from the bottom layer to the middle layer on the micron order.

Original languageEnglish
Pages (from-to)27074-27077
Number of pages4
JournalPhysical Chemistry Chemical Physics
Volume16
Issue number48
DOIs
Publication statusPublished - 2014 Nov 19
Externally publishedYes

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ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry

Cite this

Katayama, K., Choi, Y., Kang, J. W., Yaqoob, Z., So, P. T. C., Fujii, T., Kuwahara, S., Takado, K., & Ikeda, T. (2014). Depth-selective microscopic observation of a photomobile liquid crystal polymer under UV illumination. Physical Chemistry Chemical Physics, 16(48), 27074-27077. https://doi.org/10.1039/c4cp04602a