Engineers at MIT have repurposed a 19th-century photography technique to create an elastic material that changes color when it is stretched.
The team there says they have developed a scalable manufacturing technique that gives materials “structural color.” The technology could be used on pressure-monitoring bandages, shade-shifting fabrics, or touch-sensing robots.photograph ever created in 1886. Lippman’s technique utilized holography and photography.
He generated color photos by setting a very thin transparent emulsion in front of a mirror which was then exposed to a beam of light that the mirror reflected back through the emulsion. The interference of the incoming and outgoing light waves stimulated the emulsion’s grains to reconfigure their position and reflect the pattern and wavelength of the exposing light.This technique created structurally colored images of flowers and other scenes onto the emulsions.
“I realized what they do in holography is kind of the same thing that nature does with structural color,” Miller
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