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Frozen smoke

Facts for Prelims (FFP)


Source: Science Daily

 Context: Researchers have developed a ground-breaking sensor using “frozen smoke,” or aerogels, which can detect formaldehyde in real-time at concentrations as low as eight parts per billion.

  • Formaldehyde is a common indoor air pollutant emitted by various household items.

This innovation could significantly enhance indoor air quality monitoring and help mitigate health risks associated with VOCs


“Frozen smoke” is a nickname for aerogel, a silica-based material that’s the lightest solid known. Aerogel is also known as solid smoke, solid air, solid cloud, and blue smoke.