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March 18th, 2007
A nanotechnology nose for sommeliers
Researchers in the Organic Electronics Group at the University of California, Berkeley are working on printed electronic nose vapor sensors that, for instance, could monitor if wine has gone bad or the contents of a bottle of medicine is spoiled.
Most organic semiconductors are sensitive to their environment. Unfortunately, they typically show sensitivity to multiple vapors and are therefore nonspecific. Fortunately, specificity may be obtained by arraying thin-film transistors with different channel materials and subsequently pattern matching.
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