Scientists in China have made zinc oxide replicas of single scales from butterfly wings to understand and exploit their optical properties for sensor and solar cell applications.

http://www.rsc.org/chemistryworld/News/2011/March/29031101.asp

ZnO single butterfly wing scales: synthesis and spatial optical anisotropy

http://pubs.rsc.org/en/Content/ArticleLanding/2011/JM/c1jm10678c

…………. solárbol

http://www.muufi.com/?p=1067