(447g) Synthetic Photoelectrochemical Complexes for Solar Energy Conversion That Self-Regenerate Conference: AIChE Annual MeetingYear: 2009Proceeding: 2009 AIChE Annual MeetingGroup: Solar TopicalSession: Chemical Processing for Advanced Photovoltaics Time: Wednesday, November 11, 2009 - 5:15pm-5:35pm Authors: Strano, M., Massachusetts Institute of Technology Boghossian, A. A., Massachusetts Institute of Technology Ham, M., Massachusetts Institute of Technology Jeng, E. S., Massachusetts Institute of Technology Graff, R. A., University of Illinois at Urbana-Champaign Heller, D. A., Massachusetts Institute of Technology Chang, A. C., Massachusetts Institute of Technology Mattis, A., University of Illinois Urbana-Champaign Bayburt, T. H., University of Illinois Urbana-Champaign Grinkova, Y. V., University of Illinois Urbana-Champaign Zeiger, A. S., Massachusetts Institute of Technology Van Vliet, K. J., MIT Hobbie, E. K., National Institute of Standards and Technology Sligar, S. G., University of Illinois Urbana-Champaign Wraight, C. A., University of Illinois Urbana-Champaign Naturally occurring photosynthetic systems in plants are supported by elaborate pathways of self-repair that limit the impact of photo-damage and degradation. Despite advantages in stability and fault tolerance, synthetic photoelectrochemical systems have to date been invariably static. Herein, we demonstrate a complex consisting of two recombinant proteins, phospholipid and a carbon nanotube that reversibly assembles into a particular configuration, forming an array of 4 nm lipid bilayers housing light-converting proteins orientated perpendicular such that the hole conducting site is in close proximity to the nanotube conductor. The complex can reversibly self-assemble into this useful configuration, and disassemble to free components upon the addition of sodium cholate, over an indefinite number of cycles. The assembly is thermodynamically meta-stable and can only transition reversibly between free components and assembled state if the rate of surfactant removal exceeds about 10-5 sec-1. In the assembled state only, the complexes exhibit high photoelectrochemical activity using a dual Fe(CN)63-/ubiquinone mediator with external efficiencies near 40% that are repeatedly recoverable even after continuous cycles of disassembly and regeneration. By mimicking natural repair processes, such systems may lead to more robust and facile solar conversion systems.