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Bio-photosensor: Cyanobacterial photosystem I coupled with transistor via molecular wire |
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| Authors: | Terasaki Nao Yamamoto Noritaka Tamada Kaoru Hattori Mineyuki Hiraga Takashi Tohri Akihiko Sato Ikutaro Iwai Masako Iwai Michinao Taguchi Shunpei Enami Isao Inoue Yasunori Yamanoi Yoshinori Yonezawa Tetsu Mizuno Katsuya Murata Masaki Nishihara Hiroshi Yoneyama Satoshi Minakata Makoto Ohmori Tsutomu Sakai Makoto Fujii Masaaki |
| Institution: | Photonics Research Institute, National Institute of Advanced Industrial Science and Technology, 1-8-31 Midorigaoka, Ikeda, Osaka 563-8857, Japan. |
| Abstract: | We report on the first successful output of electrons directly from photosystem I (PSI) of thermophilic cyanobacteria to the gate of a field-effect transistor (FET) by bypassing electron flow via a newly designed molecular wire, i.e., artificial vitamin K(1), and a gold nanoparticle; in short, this newly manufactured photosensor employs a bio-functional unit as the core of the device. Photo-electrons generated by the irradiation of molecular complexes composed of reconstituted PSI on the gate were found to control the FET. This PSI-bio-photosensor can be used to interpret gradation in images. This PSI-FET system is moreover sufficiently stable for use exceeding a period of 1 year. |
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