브롬화 알킬혼합물 단분자 LB막의 전기화학적 특징

Electrochemical Properties of Langmuir-Blodgett(LB) Monolayer Films of Alkyl Bromides Mixture

We investigated the electrochemical properties for Langmuir-Blodgett(LB) films mixed with 1-bromotetradecane(C14), 1-bromohexadecane(C16), and 1-bromooctadecane(C18). The alkyl bromides mixture was deposited by using the Langmuir-Blodgett method on the ITO glass. The electrochemical properties measured by using cyclic voltammetry with a three-electrode system(an Ag/AgCl reference electrode, a platinum wire counter electrode and LB film-coated ITO working electrode) at various concentrations(0.5, 1.0, 1.5 and 2.0 N) of NaClO4 solution. A measuring range was reduced from initial potential to -1350 mV, continuously oxidized to 1650 mV. The scan rate was 100 mV/s. As a result, LB films of C14, C16, and C18 mixture monolayers appeared irreversible process caused by only the oxidation current from the cyclic voltammogram. The diffusivity(D) effect of LB films decreased with increasing of alkyl bromides amount.