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KMID : 0545120040140051038
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Journal of Microbiology and Biotechnology
2004 Volume.14 No. 5 p.1038 ~ p.1042
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Photoswitching Characteristics of Biodevice Consisting of Chlorophyll a Langmuir-Blodgett Film
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Nam YS
Choi JW/Lee WH
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Abstract
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The photoelectric responses of a biodevice consisting of chlorophyll a Langmuir-Blodgett film were investigated. Chlorophyll a Langmuir-Blodgett films were deposited onto ITO and Au coated glass. To confirm film formation surface analysis of chlorophyll a Langmuir-Blodgett film was carried out by measurement using atomic force microscopy. The metal/insulator/metal structured biodevice was constructed by depositing aluminum onto the chlorophyll a Langmuir-Blodgett film surface. To investigate the photoelectric response the current-voltage characteristic was measured by the conducting metal tip. The photoswitching function and transient photovoltage characteristics of the proposed device were measured by irradiation with Ar ion laser and N2 pulse laser respectively. This research suggested that the proposed biodevice consisting of chlorophyll a could be applied to the molecular scale biosensor and/or bioelectronic device.
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