I'd never heard of porphyrins until just a minute ago, and now I think they're the coolest freaking things ever. Cool...Cool...Cool...Cool!:

Shelnutt says the nanodevice could efficiently use the entire visible and ultraviolet parts of the solar spectrum absorbed by the tubes to produce hydrogen, one of the Holy Grails of chemistry.

These nanotube devices could be suspended in a solution and used for photocatalytic solar hydrogen production.