Electric-field-induced orientation of organic microcrystals with large dipole moment

Satoshi Fujita, Hitoshi Kasai, Shuji Okada, Hidetoshi Oikawa, Takashi Fukuda, Hiro Matsuda, Sukant K. Tripathy, Hachiro Nakanishi

Research output: Contribution to journalArticlepeer-review

32 Citations (Scopus)


The microcrystals of molecules with large dipole moment in a non-centrosymmetric crystal structure should possess a huge dipole moment. Therefore, such polar microcrystals dispersed in nonpolar liquid may easily respond to a weak electric field and orient to it. On the basis of this idea, dimethylaminostilbazolium tosylate (DAST) microcrystals dispersed in decahydronaphthalene have been prepared, for which a rather large dipole moment and non-centrosymmetric crystal structures was confirmed. Absorption change of DAST microcrystals was observed even under a extremely weak DC electric field of 100 V·cm-1 and the magnitude of absorption change rate at absorption maximum varied almost linearly up to 300 V·cm-1. This phenomenon may be applied to display devices.

Original languageEnglish
Pages (from-to)L659-L661
JournalJapanese Journal of Applied Physics, Part 2: Letters
Issue number6 A/B
Publication statusPublished - 1999 Jun 15

ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy (miscellaneous)
  • Physics and Astronomy(all)


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