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Last week, foreign scientists claimed that they had unlocked the mystery of the chameleon's random discoloration by changing the spacing of nanocrystals that can reflect light; then, they developed color-changing materials based on this principle, even more than hair. Thin nanocrystals are arranged on the thin colloidal film. When stretching or extruding the film, the change of the spacing will cause the reflected light to be different, thereby achieving the effect of discoloration.
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