Smart 3D printed window panels use a liquid layer to switch from clear to reflective

A research team from the University of Delaware is developing smart window panels which can easily switch between being reflective and transparent with the application of a special liquid. The windows, which are being developed with the help of 3D printing technologies, could be an affordable solution for improving heating and cooling efficiency for homes and cars.

from 3ders.org - http://www.3ders.org