Anisotropie orientation control of nonpolar organic nanocrystal dispersion by external fields

Yuji Kaneko, Satoru Shimada, Tsunenobu Onodera, Tatsumi Kimura, Hiro Matsuda, Shuji Okada, Hitoshi Kasai, Hidetoshi Oikawa, Yozo Kakudate, Hachiro Nakanishi

Research output: Contribution to journalArticlepeer-review

12 Citations (Scopus)


We have studied the external-field-induced orientation of fibriform polydiacetylene nanocrystals in dispersions that we fabricated through reprecipitation followed by orientational fixation. The polymer employed was poly[1,6-di(N-carbazolyl)-2,4-hexadiyne] (polyDCHD). An AC electric field and a magnetic field were both effective agents for controlling the orientation of the nanocrystals in the dispersions; in contrast, we observed no orientational effect when applying a DC electric field. The application of the AC electric and magnetic fields led to different anisotropic orientations of the same dispersed nanocrystals. The degree of orientation depended on the AC frequency and the strength of the AC electric or magnetic field.

Original languageEnglish
Pages (from-to)6893-6897
Number of pages5
JournalJapanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers
Issue number10 A
Publication statusPublished - 2007 Oct 9


  • Electric field
  • Fixation
  • Magnetic field
  • Nanocrystal dispersion
  • Orientation
  • PolyDCHD

ASJC Scopus subject areas

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


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