<ul data-eligibleForWebStory="false"><li>Researchers at Carnegie Mellon University have developed a new formaldehyde sensor for indoor use with a special polymer coating that extends its life and allows it to regenerate.</li><li>The sensor is based on MXene, known for its electrical properties and gas detection abilities, but typically vulnerable to air and humidity exposure.</li><li>A nano-scale polymer coating made using Chemical Vapor Deposition protects the sensor, extending its effectiveness to over five months, compared to only two months without the coating.</li><li>The coating not only protects the sensor but also helps it regenerate. When its performance fades, introducing humidity revives its sensitivity by about 90%—making it a sustainable and reliable solution for monitoring indoor air quality.</li></ul>

New smart sensor could sniff out indoor pollution—and heals itself

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