Bio-photosensor: Cyanobacterial photosystem I coupled with transistor via molecular wire.
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.
Terasaki
Nao
N
Photonics Research Institute, National Institute of Advanced Industrial Science and Technology, 1-8-31 Midorigaoka, Ikeda, Osaka 563-8857, Japan.
Yamamoto
Noritaka
N
Tamada
Kaoru
K
Hattori
Mineyuki
M
Hiraga
Takashi
T
Tohri
Akihiko
A
Sato
Ikutaro
I
Iwai
Masako
M
Iwai
Michinao
M
Taguchi
Shunpei
S
Enami
Isao
I
Inoue
Yasunori
Y
Yamanoi
Yoshinori
Y
Yonezawa
Tetsu
T
Mizuno
Katsuya
K
Murata
Masaki
M
Nishihara
Hiroshi
H
Yoneyama
Satoshi
S
Minakata
Makoto
M
Ohmori
Tsutomu
T
Sakai
Makoto
M
Fujii
Masaaki
M
D015374:Biosensing Techniques / Q000295:instrumentation* / Q000379:methods*; D000458:Cyanobacteria / Q000737:chemistry*; D004563:Electrochemistry; D006046:Gold / Q000737:chemistry; D008956:Models, Chemical; D015394:Molecular Structure; D053758:Nanoparticles / Q000737:chemistry; D045331:Photosystem I Protein Complex / Q000737:chemistry* / Q000378:metabolism* / Q000648:ultrastructure; D013501:Surface-Active Agents / Q000737:chemistry; D013890:Thiourea / Q000737:chemistry; D014173:Transistors, Electronic; D010837:Vitamin K 1 / Q000737:chemistry
D045331:Photosystem I Protein Complex; D013501:Surface-Active Agents; D006046:Gold; D010837:Vitamin K 1; D013890:Thiourea