Proceedings of the KIEE Conference (대한전기학회:학술대회논문집)

The Korean Institute of Electrical Engineers (대한전기학회)
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A study on the electromagnetic characteristics of the octadecylviologen-$(TCNQ^-)_2$ thin films with The Langmuir-Blodgett technique

LB법으로 제작된 octadecylviologen-$(TCNQ^-)_2$ 박막의 전자기적 특성 연구

  • Shin, Dong-Myung (School of Electrical & Electronic Engineering, Hong-Ik University) ;
  • Park, Je-Sang (School of Electrical & Electronic Engineering, Hong-Ik University) ;
  • Lee, Chang-Keun (School of Electrical & Electronic Engineering, Hong-Ik University) ;
  • Kang, Dou-Yol (School of Electrical & Electronic Engineering, Hong-Ik University)
  • 신동명 (홍익대학교 공과대학 전기전자공학부) ;
  • 박제상 (홍익대학교 공과대학 전기전자공학부) ;
  • ;
  • 강도열 (홍익대학교 공과대학 전기전자공학부)
  • Published : 1995.11.18
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Abstract

Langmuir-Blodgett technique offers a convenient and elegant way to organic conducting systems for ultra thin films. In conducting systems based on LB films, TCNQ derivatives have been extensively studied as electron acceptor molecules in a large number of organic conducting systems.[1] A very interesting UV-visible spectra of octadecylviologen-$(TCNQ^-)_2$ was obtained from a methylenechloride and acetonitrile mixture, and from Langmuir-Blodgett films. The ESR characteristics of octadecylviologen-$(TCNQ^-)_2$ were studied to understand conducting mechanism and structure of LB films. The ESR spectra infer that the N-dococylquinolinium-TCNQ LB films has anisotropic property. But octadecylviologen-$(TCNQ^-)_2$ does not show angular dependence. As the temperature increases from 350K to 450K, the ESR signal of LB films becomes sharp. Scanning calorimetry(DSC) of octadecylviologen-$(TCNQ^-)_2$ provides the endothermic reaction temperature of the films, 340K, which corresponds to the temperature, 365K, of the new ESR signal.

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