Researchers were inspired by the design of chameleons and developed a technology that is able to change color
Experts simulated crystalchameleon skin nanostructures in a variety of color-changing materials, but these were generally difficult to manufacture. This time, they simulated the technology in cellulose nanocrystals, a renewable material that can self-assemble into a film with iridescent structural colors.
To increase the flexibility of the cellulose nanocrystals, the researchers added the polymer PEGDA and used ultraviolet lightto combine it with rod nanocrystals, creating films with vibrant rainbow colors ranging fromThe films have become strong and flexible, stretching up to 39% of theDuring the stretching of the color film, it gradually changed fromred to green, and then changed back when relaxed.
According to researchers, they first showedreversible structural color changes caused by stretching and relaxation that are visible to the naked eye. The film also changed color with changes in pressure and humidity. According to the researchers, the new "smart material" could find applications in encryption and anti-counterfeiting.
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