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Abstract
Maxwell-displacement-current (MDC) measuring technique has been applied to the investigation of polyamic acid and azobenzen Langmuir-Blodgett films by alternating photoirradiation with visible light and ultraviolet light. MDCs across multilayer films were generated alternatingly due to the cis-trans photoisomerization of AZBPAA films. It was also found that the photoexcited electron transfer also made a contribution to the generation of MDCs with ultraviolet irradiation. Finally, MDCs across AZBPAA monolayers were found to be suppressed as a result of the deposition of PAA layers onto the AZBPAA monolayers, possibly due to the inhibitation in the cis-trans photoisomerization.