SMRTR Science & EngineeringMay 17, 2025Interesting Engineering

Scientists create a crystal that detects pollutants in water and air by changing color

SMRTR summary

Scientists in Japan have developed a unique crystal that changes color when exposed to naphthalene, a common pollutant. The crystal shifts from greenish-blue to red-violet upon contact with naphthalene and can return to its original color, making it reusable. This breakthrough could lead to new chemical sensors for environmental protection.

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