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Ultrafast graphene sensor monitors your breath while you speak

Functionalized graphene, for instance, holds exceptional promise for biological and chemical sensors. Now, in new work, researchers from the Nokia Research Center in Cambridge, UK, have shown that the distinctive 2D structure of graphene oxide (GO), combined with its superpermeability to water molecules, leads to sensing devices with an unprecedented speed. "It has been well known that graphene oxide can be very sensitive to water, and that this material is specifically permeable to water molecules," Stefano Borini, a Principal Researcher at the Nokia Research Center, tells Nanowerk. "However, the ultimate performance in terms of speed had not been reported yet."

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