Cell phone calls to be blocked by a high-tech paint
A high-tech paint, which is being developed by a company, called NaturalNano may offer a solution for the intrusion of the mobile phone rings in public establishments, such as movie theaters, concert halls, restaurants, schools, etc. The comapny, using nanotechnology, has found a way to blend particles of copper (inserted in nanotubes) into a paint that can deflect radio signals. The paint, used together with a radio-filtering device, will make it possible to block unwanted cell phone calls, while at the same time to allow other transmissions, such as emergency broadcasts. This capability to make a distinction between the different transmissions, will allow the paint to be sold legally.
Source: Newsday.com
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