title: Photosensor based on an FET utilizing a biocomponent of photosystem I for use in imaging devices.
abstract: 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.
authors.affiliation: 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
authors.forename: Nao
authors.initials: N
authors.lastname: Terasaki
authors.forename: Noritaka
authors.initials: N
authors.lastname: Yamamoto
authors.forename: Mineyuki
authors.initials: M
authors.lastname: Hattori
authors.forename: Nobutaka
authors.initials: N
authors.lastname: Tanigaki
authors.forename: Takashi
authors.initials: T
authors.lastname: Hiraga
authors.forename: Kohsuke
authors.initials: K
authors.lastname: Ito
authors.forename: Masae
authors.initials: M
authors.lastname: Konno
authors.forename: Masako
authors.initials: M
authors.lastname: Iwai
authors.forename: Yasunori
authors.initials: Y
authors.lastname: Inoue
authors.forename: Sigeyasu
authors.initials: S
authors.lastname: Uno
authors.forename: Kazuo
authors.initials: K
authors.lastname: Nakazato
mesh_terms: 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
chemical_list: D045331:Photosystem I Protein Complex; D006046:Gold