US Patent 7893513 - Nanostructured optical rectenna

http://www.freepatentsonline.com/7893513.html

This patent from Rice University teaches a fabrication method for rectennas based on nanostructured elements. Claim 1 reads:

1. A nanoelectronic device, comprising:

a first nanostructure, comprising:

a nanotube having first and second opposing ends;

a metallic nanoparticle attached to the first end; and

an insulating nanoparticle attached to the second end.