A new way to save energy on a variety of levels is introduced in the form of smart curtains. Interacting with light on a molecular level, the smart curtains open and close automatically depending on the level of light at any given moment.
Developed by researchers from the University of California, Berkeley, the smart curtains are made out of carbon nanotubes layered together onto a plastic polycarbonate membrane. According to Psfk, "The nanotubes, which are atom-thick rolls of carbon, absorb light within just fractions of a second, converts it into heat, and transfers that heat to the surface of the membrane." The material bends because the plastic polycarbonate membrane expands in response to the heat while the layer of nanotube doesn't.