This gold coating is the perfect weapon to kill fog.
from the sunlight and creates a heating effect that is powerful enough to keep fog away from the surface of an object.The coating basically employs heat to combat fogging. To heat itself, the coating relies on the most popular and easily available renewable source i.e., sunlight. Interestingly, nearly half of all theis in the near-infrared spectrum, a wavelength range that we can not see with our human eyes.
“We achieve this heating effect by fabricating a metal layer at a very specific thickness , where an optical anomaly occurs. This leads to a strong and broadband absorption of the near-infrared spectrum over just a few nm ,” a Ph.D. student at ETH Zurich and one of the study authors, Iwan Haechler, toldThe researchers explain that their coating is a 10-nanometer-thick sandwich comprising two layers of titanium oxide and a middle gold layer.
On the other hand, we also have those so-called super-hydrophobic coatings, which repel water. The issue there is scalability, especially on the glass. Like the gold coating,coatings also employ heating to prevent fogging, but instead of a renewable source such as sunlight, they use electricity to generate the heat.
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