期刊
NATURE CHEMISTRY
卷 2, 期 11, 页码 929-936出版社
NATURE PUBLISHING GROUP
DOI: 10.1038/NCHEM.822
关键词
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资金
- ENI Petroleum Co. Inc.
- MIT Energy Initiative (MITEI)
- U.S. Department of Energy [ER46488]
- Korean Government (MOEHRD) [KRF-2007-357-D00133]
- Purdue University
- NIH [GM33775]
- Direct For Biological Sciences
- Div Of Molecular and Cellular Bioscience [0818121] Funding Source: National Science Foundation
Naturally occurring photosynthetic systems use elaborate pathways of self-repair to limit the impact of photo-damage. Here, we demonstrate a complex consisting of two recombinant proteins, phospholipids and a carbon nanotube that mimics this process. The components self-assemble into a configuration in which an array of lipid bilayers aggregate on the surface of the carbon nanotube, creating a platform for the attachment of light-converting proteins. The system can disassemble upon the addition of a surfactant and reassemble upon its removal over an indefinite number of cycles. The assembly is thermodynamically metastable and can only transition reversibly if the rate of surfactant removal exceeds a threshold value. Only in the assembled state do the complexes exhibit photoelectrochemical activity. We demonstrate a regeneration cycle that uses surfactant to switch between assembled and disassembled states, resulting in an increased photoconversion efficiency of more than 300% over 168 hours and an indefinite extension of the system lifetime.
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