Physicists invented the "lightest paint in the world." 1.3 kg could color an entire a Boeing 747, compared to 500 kg of regular paint

Mave

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This Is the Lightest Paint in the World

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In a paper published this month in Science Advances, Chanda’s lab demonstrated a first-of-its-kind paint based on structural color. They think it's the lightest paint in the world—and they mean that both in terms of weight and temperature. The paint consists of tiny aluminum flakes dotted with even tinier aluminum nanoparticles. A raisin’s worth of the stuff could cover both the front and back of a door. It’s lightweight enough to potentially cut fuel usage in planes and cars that are coated with it. It doesn’t trap heat from sunlight like pigments do, and its constituents are less toxic than paints made with heavy metals like cadmium and cobalt.

Dayna Baumeister, codirector of Arizona State University’s Biomimicry Center, isn’t surprised that the paint has so many hidden functions. “It’s a fantastic demonstration of what’s possible when we rethink our designs by asking nature for advice,” she says.

Source and more: https://www.wired.com/story/lightest-paint-in-the-world/
This is fantastic news, will save an enormous amount of fuel worldwide.
Also: my guess is that we'll see this is in F1 pretty soon as well.
 
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