Swiss Scientists Invent Nanotechnology To Prevents Glasses From Fogging 

Researchers at ETH Zurich have developed a gold nanocoating that heats the glass up to 46F, absorbing large amounts of infrared radiation, preventing glasses from fogging up in many humid conditions. And unlike traditional approaches that simply distribute water with hydrophilic molecules, this one prevents condensation from even starting.

The gold nanocoating heats the glass up to about 8 degrees, absorbing a large amount of infrared radiation. Unlike other methods that simply distribute water using hydrophilic molecules, this method prevents the condensation process from starting. The 10nm thick coating contains gold between titanium oxide layers, they not only enhance the heating effect through refraction, but also protect the gold from wear. The design will also prevent overheating in warm weather as it prevents radiation from reaching the other side of the goggles.

The research team considers this invention also useful in reducing fogging of car windshields, mirrors and other surfaces.