Structural phase transition in two-dimensional crystallites of organic dye molecules formed on aqueous subphases

Noritaka Kato, Ichiro Hirosawa, Masugu Sato, Naoshi Ikeda, Ken Ichi Iimura, Yoshiaki Uesu

Research output: Contribution to journalConference article

1 Citation (Scopus)

Abstract

The 2D crystallites of polar organic dye molecules on an aqueous subphase exhibit a thermochromic phase transition. The visible absorption band of the crystallites depends on the temperature and the composition of the subphase. In-situ observations of the phase transition were carried out by a grazing incidence X-ray diffraction method. A shift and a split of the diffraction peaks were observed between the different phases, indicating a change in the molecular arrangement of the crystallites in their chromic transition.

Original languageEnglish
Pages (from-to)162-167
Number of pages6
JournalFerroelectrics
Volume346
DOIs
Publication statusPublished - Aug 2 2007
Event8th Russia/CIS/Baltic/Japan Symposium on Ferroelectricity, RCBJSF-8 - Tsukuba, Japan
Duration: May 15 2006May 19 2006

Keywords

  • Grazing incidence X-ray diffraction
  • J-aggregate
  • Merocyanine dye
  • Monolayer at the air-water interface; Langmuir film
  • Synchrotron radiation

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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