Photocurrent generation by photosynthetic purple bacterial reaction centers interfaced with a porous antimony-doped tin oxide (ATO) electrode

Carey, A.-M., Zhang, H., Mieritz, D., Volosin, A., Gardiner, A., Cogdell, R. , Yan, H., Seo, D.-K., Lin, S. and Woodbury, N. W. (2016) Photocurrent generation by photosynthetic purple bacterial reaction centers interfaced with a porous antimony-doped tin oxide (ATO) electrode. ACS Applied Materials and Interfaces, 8(38), pp. 25104-25110. (doi:10.1021/acsami.6b07940) (PMID:27576015)

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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.

Item Type:Articles
Additional Information:This work was funded by the DOD MURI Award W911NF-12- 1-0420 and NSF Grants MCB-1157788 and MCB-1243082; A.T.G. and R.J.C. were supported by the Photosynthetic Antenna Research Center (PARC), an Energy Frontier Research Center funded by the U.S. Department of Energy, Office of Science, Basic Energy Sciences under Award DESC0001035, and by the Royal Society UK/USA International Exchanges Scheme.
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Cogdell, Professor Richard and Gardiner, Dr Alastair
Authors: Carey, A.-M., Zhang, H., Mieritz, D., Volosin, A., Gardiner, A., Cogdell, R., Yan, H., Seo, D.-K., Lin, S., and Woodbury, N. W.
College/School:College of Medical Veterinary and Life Sciences > Institute of Molecular Cell and Systems Biology
Journal Name:ACS Applied Materials and Interfaces
Publisher:American Chemical Society
ISSN:1944-8244
ISSN (Online):1944-8252
Published Online:30 August 2016

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