alexa Quantum conversion and image detection by a bacteriorhodopsin-based artificial photoreceptor.


Journal of Microbial & Biochemical Technology

Author(s): Miyasaka T, Koyama K, Itoh I

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Abstract A thin film (50 to 500 angstroms thick) comprising fragments of bacteriorhodopsin (bR)-containing purple membrane was formed on an SnO(2) conductive electrode by the Langmuir-Blodgett method. The film was put into contact with a thin, aqueous electrolyte gel to construct an electrochemical sandwich-type photocell with a junction structure SnO(2)/bR/electrolyte/Au electrode. Under visible light irradiation, the bR-based photocell produced an efficient rectified photocurrent that proved to have unique differential responsivity to light intensity, which is characteristic of in vivo biological photoreceptors. An artificial photoreceptor comprising a pixel network of the bR photocell was fabricated in an attempt to study image-detecting and processing abilities of bR. This article was published in Science and referenced in Journal of Microbial & Biochemical Technology

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