Regular readers of this site will already be aware of the connections and overlaps between cleantech and nanotech investing.
For an interesting take, read the recent write-ups by Norm Wu of Alameda Capital (part one here, part two here, and two more parts to follow soon). A good discussion of the space, with some mentions of specific cleantech-related companies such as Nanostellar, Hyperion Catalysts, Nanomix, and others.
