Well this is interesting. These folks claim to have invented a substance the creates incredibly efficient antennas by using nano-particles that can be sprayed onto almost any surface. They are claiming significant performance improvements over standard antennas. The secret seems to be in how this goo that you spray onto a tree or clothes or whatever, creates a coating of nanocapacitors that can charge and discharge very quickly without generating a lot of heat, thus creating an efficient antenna.
I really have no idea if this is for real or not, but it sure is a creative approach. The video is pretty long, but there is an article available here.
Thanks for the pointer Dave.