They produced a nanowire 10,000 times thinner than a human hair that can be cheaply grown by common bacteria and tuned to 'smell.'
The innovation was spearheaded by the new study’s senior authors Derek Lovley, Distinguished Professor of Microbiology at UMass Amherst, and Jun Yao, professor of electrical and computer engineering in the College of Engineering at UMass Amherst. It was based on the functioning of the human nose.“They are vastly more sensitive and efficient than any mechanical or chemical device that could be engineered.
“What we’ve done,” says Lovley, “is to take the ‘nanowire gene’—called pilin—out of G. sulfurreducens and splice it into the DNA of Escherichia coli, one of the most widespread bacteria in the world.” “The microbe-produced nanowires function much better as sensors than previously described sensors fabricated with traditional silicon or metal nanowires.”Now, the new sensors have many applications beyond the detection of ammonia and kidney disease.
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