Porphyrin nanotubes that produce hydrogen

Sandia is reporting that porphyrin nanotubes coated with gold on the inside and platinum on the outside may be able to use sunlight to split water and produce hydrogen. The tubes are actual nanoscale devices having diameters from 50-70nm and tube walls 20nm thick. Scientists indicated that the tubes may be able to use the ultraviolet part of the solar spectrum as well as the visible which would likely make them more efficient than solar cells unable to do this.

This fits well with recent articles discussing energy production as one key application of nanotechnology.

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