Surface Analysis and Electrical Properties for Complex with Concentration of Metal ion in LB Ultra-thin Films Using IMI-O Polymer

IMI-O 고분자 LB막의 금속 이온의 착체 농도에 따른 전기특성 및 표면분석

  • Jung, S.B. (Dept. of Electrical Eng. Dong-A University) ;
  • Yoo, S.Y. (Dept. of Electrical Eng. Dong-A University) ;
  • Park, J.C. (Dept. of Electronics, Yeungjin Junior College) ;
  • Kwon, Y.S. (Dept. of Electrical Eng. Dong-A University)
  • Published : 2000.07.17

Abstract

We fabricated an IMI-O polymer containing an imidazole group that could form a complex structure between the monolayer and the metal ions at the air-water interface. Also, the surface analysis and the electrical properties of metal ion complex of Langmuir-Blodgett (LB) films were investigated by using $\pi$-A isotherms. Atomoic force microscopy (AFM), current-voltage (I-V) measurements. In the $\pi$-A isotherms the molecular area was expanded with $Fe^{3+}$ concentration increase. It is considered that the expansion of molecular area is due to electrostatic repulsion between the polymer chains and hydrophobic increase of ionic strength. In the I-V characteristics, it is found that the limiting area has effects on the change of conductivity. And, the dielectric relaxation time decreased for increase of the $Fe^{3+}$ concentration.

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