Tracer detection: specific molecules stick to microbial nanowires grown on genetically modified E. coli.
Scientists from the University of Massachusetts Amherst have developed a new electronic nose that uses microbial nanowires to detect gases in the air. The team, led by microbiologist Derek Lovley and chemist Jun Yao, believe the device could be used for health monitoring by detecting specific compounds in breath, blood or urine.
According to Lovley, the technology works by using a protein in the nanowires that can bind to specific gases. “When the gas binds to the protein, it changes the conductivity of the nanowire, which we can measure and use to identify the gas,” he explains.
Yao adds that the electronic nose is also highly sensitive. “Our device can detect gases at concentrations as low as a few parts per billion, which is about 100 times better than existing electronic noses,” he says.
Continue reading… “Microbial nanowires create ‘electronic nose’ for health monitoring”
