Fabric that can power a lightbulb
Researchers at Chalmers University of Technology have developed a fabric generates electricity when it is stretched or exposed to pressure, essentially converting kinetic energy into electric power. The fabric contains a piezoelectric yarn that it woven together with an electrically conducting, resulting in a fabric that when stretched or deformed can turn on an LED light, send wireless signals, or drive small electrical units. The piezoelectric yarn is made up of fibers as thing as a strand of hair, when the fibers are wet they become enclosed in liquid, improving the conductivity of the fibers. Therefore, the more you sweat while wearing this material, the more efficient it becomes. Read more about this fabric at Chalmers University of Technology.