An ultra-thin, gold-based transparent coating is able to convert sunlight into heat and avoid fogging.
The coating is made up of a single gold nanolayer and is significantly thin, which makes it transparent as well as pliable. Further, it absorbs infrared light selectively.
The problem with the way things are done in cars is that electric heating is required, which is inefficient and energy wasteful. In contrast, the new coating is heated passively and requires, during the daytime, no additional energy source.sandwiched between two ultrathin layers of titanium oxide, an electrically insulating material. Due to their refractive properties, these two outer layers increase the efficacy of the heating effect.
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