Abstract

Mixed monolayers composed of phospholipid and fatty acid containing azobenzene on the water surface were investigated by means of the Maxwell displacement current (MDC) measuring method. The transient displacement current pulses were generated across mixed monolayers due to the photoisomerization of fatty acid containing azobenzene by alternating irradiation of ultraviolet and visible light. It was found that the current pulses were generated over the entire range of molecular area, and the maximum of MDC appeared at the molecular area just before the initial rise of surface pressure in both 1st and 2nd compression cycles.

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