British and German researchers have developed a new type of flexible plastic film. These 'polymer opal films' can change colors under certain conditions. For example, they could easily help you to see ...
A synthetic material which mimics the brightest and most vivid colors in nature, and changes color when twisted or stretched, has been developed. It could have important applications in the security, ...
WASHINGTON, July 23--Imagine cleaning out your refrigerator and being able to tell at a glance whether perishable food items have spoiled, because the packaging has changed its color, or being able to ...
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