Fog-Free Glass -- Materials Scientists Create Polymer Coating Against Fogged Glass

Instead of having to add a coating to glass to make it fog-free, processing it in a way that creates small holes in the surface can make it fog-free without the addition of material.

MIT's new coating is "superhydrophilic": it really loves water. It's made of a three-dimensional matrix of water-loving polymer chains mixed in with glass nanoparticles and tiny air bubbles. The edges of the tiny glass particles come in contact with many droplets of water and the water droplets flatten and join up to form sheets. The glass nanoparticles and air bubbles also can act like the holes in a sponge, sucking the droplets downward to wick away water.

Fog-Free Glass -- Materials Scientists Create Polymer Coating Against Fogged Glass