2008 NSTI Nanotechnology Conference and Trade Show - Nanotech 2008 - 11th Annual

Partnering Events:

TechConnect Summit
Clean Technology 2008

Biotemplated synthesis of materials for photo-oxidation of water

A. Magyar, S. Cui, Y-S Nam, V. Dini, A.M. Belcher
Massachusetts Institute of Technology, US

Keywords:
photo-oxidation, biotemplated synthesis, M13 bacteriophage, iridium oxide nanowires, zinc porphyrin

Abstract:
The photo-oxidation of water by mimicking nature’s photosystem can provide a direct route for storing solar energy in chemical bonds. Our approach combines iridium oxide, proven to be one of the most efficient catalysts for the evolution of oxygen, and zinc porphyrin, shown to have great potential as a photo-sensitizer, on a genetically tuned biological template, the M13 bacteriophage. The bacteriophage acts as an excellent framework for stably co-assembling the metal catalyst and the porphyrin, the close coupling of which is critical to the efficiency of solar conversion. The photo-conversion efficiency of water into protons and oxygen by the IrOx nanowire/porphyrin system is measured by monitoring evolved gaseous oxygen using a custom built multi-channel apparatus. Useful energy can be harvested from this system by utilizing the proton gradient established during photolysis to drive biological processes such as a proton pump or alternatively by coupling the IrOx system with a bio-assembled nanowire system for evolution of hydrogen.


Nanotech 2008 Conference Program Abstract