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New Technology Allows Diabetes Testing Through Saliva and Tears
Credit: Jeff Goecker, Purdue University.

This Research in Action article was provided to LiveScience in partnership with the National Science Foundation.

These color-enhanced scanning electron microscope images show nanosheets that are components of a new biosensor that can detect even minute concentrations of glucose in four different human serums: saliva, tears and urine as well as blood. The technology uses nanosheets made of graphene, platinum nanoparticles and an enzyme (glucose oxidase) that converts glucose to peroxide, which generates a signal on an electrode. The biosensor might one day be a welcome relief to diabetics who have to regularly prick their fingers to test their sugar levels. This research was supported by NSF.

Editor's Note: Any opinions, findings, and conclusions or recommendations expressed in this material are those of the author and do not necessarily reflect the views of the National Science Foundation. See the Research in Action archive.