With the application of a Nansulate paint coating, the thermal difference between inside and outside temperatures could be used to generate electricity, in addition to saving energy through its insulating properties.
Thermal Paint that Generates Electricity

Thermal Paint that Generates Electricity
(via pesn.com)
Submitted by sterlingda on Tue, 2007-10-02 05:53. | Tags: technology | nanotechnology | paint | Renewable Energy | thermal