Quantum Conversion and Image Detection by a Bacteriorhodopsin-Based Artificial Photoreceptor
- 17 January 1992
- journal article
- other
- Published by American Association for the Advancement of Science (AAAS) in Science
- Vol. 255 (5042), 342-344
- https://doi.org/10.1126/science.255.5042.342
Abstract
A thin film (50 to 500 angstroms thick) comprising fragments of bacteriorhodopsin (bR)-containing purple membrane was formed on an SnO2 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 SnO2/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.Keywords
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