title: Development of UV Light Irradiation Patterning of Bacteriorhodopsin Thin Films for Biomimetic Functional Devices.
abstract: We developed a new patterning method for bacteriorhodopsin (bR) thin films using UV light irradiation. The proton pump function of bR thin films can be deactivated with UV light irradiation. Inactivation of the proton pump function of bR is related to structural changes or photo-bleaching of the retinal in bR using UV light exposure, which was confirmed with absorption and Raman spectroscopy measurements. Utilizing inactivation of the proton pump function with UV light irradiation, we prepared a bR photocell with a stripe-patterned bR thin film and measured its photocurrent response. The new patterning method is applicable to complicated patterning and patterning with a higher spatial resolution, which extends the application of bR thin films as sensor devices.
authors.forename: Yoshihiro
authors.initials: Y
authors.lastname: Haruyama
authors.forename: Katsuyuki
authors.initials: K
authors.lastname: Kasai
authors.forename: Toshiki
authors.initials: T
authors.lastname: Yamada
authors.forename: Shukichi
authors.initials: S
authors.lastname: Tanaka
authors.forename: Yukihiro
authors.initials: Y
authors.lastname: Tominari
authors.forename: Takahiro
authors.initials: T
authors.lastname: Kaji
authors.forename: Masaya
authors.initials: M
authors.lastname: Kitamura
authors.forename: Akira
authors.initials: A
authors.lastname: Otomo
mesh_terms: D001436:Bacteriorhodopsins / Q000737:chemistry* / Q000528:radiation effects*; D040761:Biomimetic Materials / Q000138:chemical synthesis*; D032701:Biomimetics / Q000295:instrumentation; D004579:Electron Transport / Q000528:radiation effects; D008422:Materials Testing; D008567:Membranes, Artificial; D054802:Molecular Imprinting / Q000379:methods*; D011829:Radiation Dosage; D013499:Surface Properties / Q000528:radiation effects; D014466:Ultraviolet Rays
chemical_list: D008567:Membranes, Artificial; D001436:Bacteriorhodopsins