Bomb-Sniffing Bionic Plants Could Look for Pollution
Plants embedded with carbon nanotubes could detect explosives and wirelessly relay the information to an electronic device. Credit: Juan Pablo Giraldo/UCR Bionic plants that can detect explosives in real time could be the future of environmental monitoring and urban farming, researchers said in a new study. The spinach plants have carbon-nanotube-based nanoparticles in their leaves that give off infred light and are sensitive to the presence of nitroaromatics, key components of several explosives, the scientists said. If these chemicals are present in groundwater, they are absorbed by the roots and transported to the leaves, where they cause the infrared emissions of the so-called "nanosensor" to decrease. A detector that is similar in complexity to a smartphone can then register this change in emissions, the researchers said. In tests with the nitroaromatic picric acid, this dip was detected within 10 minutes of the roots taking up the chemical, accord...