How to make color-changing transformers with polymers

https://phys.org/news/2023-09-color-changing-polymers.html

"liquid crystal elastomer color changes and shape morphing responding to temperature, mechanical deformation through stretching, and illumination... cholesteric LCE coatings with structural color patterns, pigment not added... placing another soft polymer carrier layer on top stretched, change from orange to blue, reflects near-IR when unstretched... mechanochromic stickers detect substrate deformation, human-computer interaction, strain sensors in smart textiles, soft robotics, responsive jewelry and art"

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