Photosensor based on an FET utilizing a biocomponent of photosystem I for use in imaging devices.
We have investigated a photosensor that consists of a field emission transistor (FET) utilizing the biocomponent of the photosystem I (PSI) protein complex for use in an imaging device. The PSI was immobilized on a gold electrode via the self-assembling monolayer (SAM) of 3-mercapto-1-propanesulfonic acid sodium salt to obtain a PSI-modified gold electrode. As for the PSI-modified gold electrode, the basic photoresponses originating from the excitation of PSI, including the photocurrent (106 nA) and the photoresponse of the open-circuit voltage (photo-Voc: 28.6 mV), were characterized. Then, the PSI-modified gold electrode was linked to the gate of the FET using a lead line, and the device was successfully driven by the photoelectric signals from the PSI like a voltage follower circuit. Further, we successfully demonstrated that the PSI-based FET acts as a photosensor in imaging devices.
Terasaki
Nao
N
National Institute of Advanced Industrial Science and Technology (AIST), Measurement Solution Research Center,807-1 Shuku-machi, Tosu, Saga 841-0052, Japan. nao-terasaki@aist.go.jp
Yamamoto
Noritaka
N
Hattori
Mineyuki
M
Tanigaki
Nobutaka
N
Hiraga
Takashi
T
Ito
Kohsuke
K
Konno
Masae
M
Iwai
Masako
M
Inoue
Yasunori
Y
Uno
Sigeyasu
S
Nakazato
Kazuo
K
D000458:Cyanobacteria / Q000201:enzymology; D004553:Electric Conductivity; D004566:Electrodes; D006046:Gold / Q000737:chemistry; D008027:Light; D055668:Photochemical Processes; D045331:Photosystem I Protein Complex / Q000737:chemistry / Q000378:metabolism*; D014173:Transistors, Electronic
D045331:Photosystem I Protein Complex; D006046:Gold