Nanu, Nano

I like this idea. Now if they could only paint cars with the stuff:

NaturalNano has used nanotechnology to develop a type of paint that stops cellphone signals. It’s done by blending particles of copper that are inserted into nanotubes, and then mixing and suspending these tiny particles into a can of paint.

NaturalNano’s idea is to completely block cellphone signals with this paint, and then provide a radio filtering device that will allow wireless signals to pass through only when they’re appropriate. Using this system, a theater owner could allow cellphone signals before the show or during an intermission, but completely block them during the movie.