期刊
ACS APPLIED MATERIALS & INTERFACES
卷 7, 期 18, 页码 9328-9335出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.5b01065
关键词
biocomposite materials; solar energy conversion; biohybrid solar cells; conjugated polymers
资金
- National Science Foundation
- Scialog Program from the Research Corporation for Science Advancement
- Office Of The Director
- EPSCoR [1004083] Funding Source: National Science Foundation
In this work, we report for the first time the entrapment Of the biomolecular supercomplex Photosystem I (PSI) within a conductive polymer network of polyaniline via electrochemical copolymerization. Composite polymer-protein films were prepared on gold electrodes through potentiostatic electropolymerization from a single aqueous. solution, containing both aniline and PSI. This study demonstrates the controllable integration of large membrane proteins into rapidly prepared composite films, the entrapment of such proteins was observed through photoelectrochemical analysis PSI's unique function as a highly efficient biomolecular photodiode generated a significant enhancement in photocurrent generation for the PSI loaded polyaniline films, compared to pristine polyaniline films and dropcast PSI films. A comprehensive study was then performed to separately evaluate film thickness and PSI concentration in the initial polymerization solution and their effects on the net photocurrent of this, novel Material. The best performing composite films were prepared with 0.1 mu M PSI in the polymerization solution and deposited to a film thickness of 1285 nth, resulting in an average photocurrent density of 5.7 mu A cm(-2) with an efficiency of 0.005%. This photocurrent output represents an enhancement greater than 2-fold over bare polyaniline films and 200-fold over a traditional PSI multilayer film of comparable thickness.
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