The ongoing COVID-19 pandemic has shown that the world
needs technology that can quickly and accurately identify invisible
dangers, including harmful substances or airborne environmental
pollutants. Colorimetric sensors—devices that intuitively reveal
information about their environment through color changes—are an
attractive option in this regard. But, for more people to benefit
from these sensors, they must be easy to produce at a large scale.
This is a major limitation with currently available colorimetric
sensors, which require complex structures with intricate
fabrication procedures. Other problems with existing devices
include slow response times and unsaturated colors.
Novel virus-based colorimetric sensor can show true colors
of airborne threats
