External field-induced orientation of DAST nanocrystals in the dispersion state and the fixation

H. Kasai, Y. Kaneko, Tsunenobu Onodera, H. Nakanishi, Hidetoshi Oikawa, S. Okada, S. Shimada, T. Kimura, H. Matsuda

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)


We have prepared an dispersion of 4'-dimethylamino-N-methylstilbazolium p-toluenesulfonate (DAST) nanocrystals using the reprecipitation method and have spectroscopically measured their orientation in an electric or magnetic field. As a result, we could observe reversible and efficient contrast change that depends on the on-off of applied field. In addition, with controlling the orientation of DAST nanocrystals by the external field, the immobilization was performed using light-cured polymer and the light irradiation. These materials may be applied to the display device or polarized light filter.

Original languageEnglish
Title of host publicationOrganic Photonic Materials and Devices X
Publication statusPublished - 2008 Apr 21
EventOrganic Photonic Materials and Devices X - San Jose, CA, United States
Duration: 2008 Jan 222008 Jan 24

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
ISSN (Print)0277-786X


OtherOrganic Photonic Materials and Devices X
Country/TerritoryUnited States
CitySan Jose, CA


  • DAST
  • External field induced orientation
  • Fixation
  • Light-cured polymer
  • Nanocrystals
  • Reprecipitation method

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering


Dive into the research topics of 'External field-induced orientation of DAST nanocrystals in the dispersion state and the fixation'. Together they form a unique fingerprint.

Cite this