| 초록 |
In the development of new functional devices, most key concepts or ideas have been inspired from the biological systems such as electron transfer chain or photosynthetic reaction center. Molecular electronic devices can be realized artificially by mimicking the self-organized functional molecules in the biological systems. The molecular thin film fabricated by appropriate techniques can be used as a model system corresponding to the photosynthetic reaction center in the biological system.Cytochrome c is one of the well known electron transfer proteins. For cytochromes c extracted from the various sources, the structures and the properties have been investigated by many researchers in biochemistry, microbial physiology, and physical chemistry. The key feature of cytochrome c, the capability of electron transfer driven from the redox chemistry of the heme group, has been used to organize the artificial electron transfer systems.In the present paper, a molecular electronic device using cytochrome c-adsorbed hetero-LB films are presented based on the biomimesis. A molecular device with MIM (Metal/Insulator/Metal) structure was constructed by depositing aluminum, as a top electrode, onto the cytochrome c-adsorbed hetero-LB films aligned on ITO glass. Using a xenon lamp system, light with 460 nm wavelength was irradiated to the MIM device and photoswitching function was observed in the proposed molecular electronic device.
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