A nano-thin layer of gold could prevent fogged-up glasses
It can be more than a little frustrating when your glasses fog up — just ask anyone who has worn a face mask over the past two years of the pandemic. Nanotechnology might soon keep your vision clear, however. ETH Zurich researchers havea gold nanocoating that heats glass by up to 46F by absorbing a large amount of infrared radiation, keeping your glasses fog-free in many humid conditions.
The 10nm thick coating sandwiches gold between layers of titanium oxide that not only amplify the heating effect through refraction, but protect the gold against wear. The design also won't lead to overheating in warm weather as it prevents radiation from reaching the other side. ETH is keen to point out that it made the coating using techniques common to manufacturing, such as vacuum-based vapor deposition in a clean room.
Before you ask: it's not as expensive as you think. While gold is a pricey material, the amount needed is so small that it shouldn't add much to the price of your glasses. Nonetheless, the team plans to study the use of other metals.You can disable notifications at any time in your settings menu.
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