Journal of the Korean Applied Science and Technology (한국응용과학기술학회지)

The Korean Society of Applied Science and Technology (한국응용과학기술학회)
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The Electrochemical Characterization of Mixture LB Films of Fatty Acid and Phospholipids

지방산과 인지질 혼합 LB막의 전기화학적 특성

  • Son, Tae-Chul (Dept. of Chemical Engineering, Changwon National University) ;
  • Kim, Nam-Seok (Dept. of Chemical Engineering, Changwon National University) ;
  • Park, Keun-Ho (Dept. of Chemical Engineering, Changwon National University)
  • 손태철 (창원대학교 화공시스템공학과) ;
  • 김남석 (창원대학교 화공시스템공학과) ;
  • 박근호 (창원대학교 화공시스템공학과)
  • Published : 2003.06.30
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Abstract

We studied electrochemical characteristics of Langmuir-Blodgett(LB) films by using cyclic voltammetry with a three-electrode system. An Ag/AgCl as a reference electrode, a platinum wire as a counter electrode and LB film-coated indium tin oxide(ITO) as a working electrode were used to study electrochemical characteristics at a various concentration of $NaClO_4$ solution. LB films were reduced from initial potential to -1350 mV, continuously oxidized to l650mV and returned to the initial point. The scan rate was l00mV/s. The monolayer surface morphology of the LB film have been measured by Atomic Force Microscope(AFM). As a result, We comfirmed that the microscopic properties of LB film by AFM showed the good orientation of momolayer molecules and the thickness of monolayer was 3.5-4.lnm. The cyclic voltammograms(CV) of the ITO-coated glass showed the peak potentials for the reduction-oxidation reation. LB films of 4-octyl-4'-(5-carboxypentamethyleneoxy) azobenzene(8A5H) / L-${\alpha}$-phosphayidyl choline, dilauroyl(DLPC) seemed to be irreversible process caused by only the oxidation current from the cyclic voltammogram. The current of oxidatation increased at cyclic voltammogram by increasing 8A5H density in LB films. The diffusivity(D) of LB films increased with increasing of a 8A5H amount and was inversely proportional to the concentration of $NaClO_4$ solution.

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References

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