The photo charge of a bacterioRhodopsin electrochemical cells measured by a charge amplifier

Seiichi Takamatsu; Kazunori Hoshino; Kiyoshi Matsumoto; Tsutomu Miyasaka; Isao Shimoyama

doi:10.1587/elex.8.505

LETTER

The photo charge of a bacterioRhodopsin electrochemical cells measured by a charge amplifier

Seiichi Takamatsu, Kazunori Hoshino, Kiyoshi Matsumoto, Tsutomu Miyasaka, Isao Shimoyama

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Keywords: photosensitive protein, bacterioRhodopsin, charge amplifier

JOURNAL FREE ACCESS

2011 Volume 8 Issue 7 Pages 505-511

DOI https://doi.org/10.1587/elex.8.505

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Abstract

We propose that electrochemical cells based on bacterioRhodopsin (bR), a photosensitive protein, generate electric charges under illuminated light and that a suitable signal detection apparatus for this cell type is a charge amplifier. By using charge amplifiers, we observed bR-photocell electric charges that were proportional to the intensity of incident light, which ranged from 0 to 8mW/cm². Then, the 4 × 4 micro-patterned bR photosensor array was connected to charge amplifiers to form an image sensor system. Static and moving images were detected with the constructed image sensor system.

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