title: Photocurrent Generation by Photosynthetic Purple Bacterial Reaction Centers Interfaced with a Porous Antimony-Doped Tin Oxide (ATO) Electrode.
abstract: The ability to exchange energy and information between biological and electronic materials is critical in the development of hybrid electronic systems in biomedicine, environmental sensing, and energy applications. While sensor technology has been extensively developed to collect detailed molecular information, less work has been done on systems that can specifically modulate the chemistry of the environment with temporal and spatial control. The bacterial photosynthetic reaction center represents an ideal photonic component of such a system in that it is capable of modifying local chemistry via light-driven redox reactions with quantitative control over reaction rates and has inherent spectroscopic probes for monitoring function. Here a well-characterized model system is presented, consisting of a transparent, porous electrode (antimony-doped tin oxide) which is electrochemically coupled to the reaction center via a cytochrome c molecule. Upon illumination, the reaction center performs the 2-step, 2-electron reduction of a ubiquinone derivative which exchanges with oxidized quinone in solution. Electrons from the electrode then move through the cytochrome to reoxidize the reaction center electron donor. The result is a facile platform for performing redox chemistry that can be optically and electronically controlled in time and space.
authors: Biodesign Center for Innovation in Medicine at Biodesign Institute, Arizona State University , Tempe, Arizona 85287, United States.
authors: Anne-Marie
authors: AM
authors: Carey
authors: School of Molecular Sciences, Arizona State University , Tempe, Arizona 85287-1604, United States.
authors: HaoJie
authors: H
authors: Zhang
authors: School of Molecular Sciences, Arizona State University , Tempe, Arizona 85287-1604, United States.
authors: Daniel
authors: D
authors: Mieritz
authors: School of Molecular Sciences, Arizona State University , Tempe, Arizona 85287-1604, United States.
authors: Alex
authors: A
authors: Volosin
authors: Institute of Molecular Cell and Systems Biology, University of Glasgow , Glasgow, Scotland G12 8QQ, United Kingdom.
authors: Alastair T
authors: AT
authors: Gardiner
authors: Institute of Molecular Cell and Systems Biology, University of Glasgow , Glasgow, Scotland G12 8QQ, United Kingdom.
authors: Richard J
authors: RJ
authors: Cogdell
authors: School of Molecular Sciences, Arizona State University , Tempe, Arizona 85287-1604, United States.|Biodesign Center for Molecular Design and Biomimetics at Biodesign Institute, Arizona State University , Tempe, Arizona 85287, United States.
authors: Hao
authors: H
authors: Yan
authors: School of Molecular Sciences, Arizona State University , Tempe, Arizona 85287-1604, United States.
authors: Dong-Kyun
authors: DK
authors: Seo
authors: Biodesign Center for Innovation in Medicine at Biodesign Institute, Arizona State University , Tempe, Arizona 85287, United States.|School of Molecular Sciences, Arizona State University , Tempe, Arizona 85287-1604, United States.
authors: Su
authors: S
authors: Lin
authors: Biodesign Center for Innovation in Medicine at Biodesign Institute, Arizona State University , Tempe, Arizona 85287, United States.|School of Molecular Sciences, Arizona State University , Tempe, Arizona 85287-1604, United States.
authors: Neal W
authors: NW
authors: Woodbury
mesh_terms: D000965:Antimony / Q000737:chemistry*; D004566:Electrodes; D004579:Electron Transport; D045322:Photosynthetic Reaction Center Complex Proteins; D020560:Proteobacteria; D017971:Tin Compounds
chemical_list: D045322:Photosynthetic Reaction Center Complex Proteins; D017971:Tin Compounds; D000965:Antimony; C045358:stannic oxide
keywords: antimony-doped tin oxide (ATO); cytochrome c; electron transfer; photocurrent; porous electrode; reaction center