The researchers mixed turmeric with a viscous polymer and spread it onto glass plates. Then they shone an LED onto the glass plate, and measured the light waves emitted from the plate. In the presence of explosives, the emitted light was dimmer. An array of turmeric-based sensors could detect a wide range of materials, the BBC reports.
Such sensors would be cheap and easy to deploy in areas where authorities would want to look for explosives, from airports to fields full of land mines.