![]() ![]() The distance is determined by the thickness of the coating-a thick one forces the balls farther apart, while the opposite brings them closer together. ![]() The clear silica coating serves that purpose by forcing the balls farther apart or closer together. ![]() Prior research has shown that the spacing between balls of melanin produces different colors. The team created tiny balls of melanin and then coated them with silica to create structures similar to those found in the bird feathers. The new technique was inspired by duck and turkey feathers. In this new effort, the researchers report that they have developed a technique that overcomes those challenges, allowing for the production of colored materials in a way that is fast, simple and scalable. Material scientists have found that using structures to create color has many advantages over those that require absorption, but making them that way has proven to be challenging. One is to use materials that have molecules capable of absorbing light, the other is to use materials that cause light to scatter in desired ways using nanostructures. Prior research has shown that there are two basic ways to produce color in a material. ![]()
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