Structure and properties of highly conductive langmuir-blodgett films based on dioctyldimethylammonium-Au(dmit)2 salt

Yuuki Takigawa, Ryo Watanabe, Shin Ichi Morita, Yasuhiro F. Miura, Michio Sugi

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)


Langmuir-Blodgett (LB) films of dioctyldimethylammonium-Au(dmit) 2 [2C8-Au(dmit)2] salt show a relatively high room-temperature conductivity of up to 17 S/cm. The conductivity is as high as 50 ± 23 S/cm after electrochemical oxidation. A distinct absorption band is seen at 287 nm and it increases linearly with the number of layers, indicating a reproducible film deposition for up to 20 layers. During the post-treatment, the absorption peak decreases together with some shoulders and a broad band appears in the near-infrared (NIR) region with an isosbestic point at 609 nm, indicating the formation of conduction electrons. The UV/visible absorption spectrum changes markedly in the first 60 min of the post-treatment and becomes almost constant later, which corresponds well with the change in conductivity during the post-treatment.

Original languageEnglish
Pages (from-to)394-396
Number of pages3
JournalJapanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers
Issue number1 B
Publication statusPublished - 2006 Jan 20
Externally publishedYes


  • Electrochemical oxidation
  • Langmuir-Blodgett films
  • Metal(dmit) complexes
  • UV/visible absorption spectroscopy

ASJC Scopus subject areas

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

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