The Lotus Effect II

The 28 November 2009 issue of New Scientist just arrived on my desk with a nice article about how solar cell nanotechnology is borrowing from the lotus leaf.

"The roughness of the new cells at nanoscales...mimics the fibrous bumps on the leaves of the lotus plant, which help it repel water." As happens on lotus leaves (see previous posting), water droplets form beads on the surface of new solar cells and roll off along with "light-blocking dust".