Abstract
A wearable, graphene-based patch could one day maintain healthy blood glucose levels in people by measuring the sugar in sweat and then delivering the necessary dose of a diabetes drug through the skin (Nat. Nanotechnol. 2016, DOI: 10.1038/nnano.2016.38). The device takes scientists a step closer to the “coveted prize” in diabetes care: a noninvasive method to monitor and control blood glucose levels, writes Richard Guy of the University of Bath in a commentary about the work. For the new patch, the researchers, led by Dae-Hyeong Kim of Seoul National University, decided to detect glucose in sweat because previous studies had shown that levels of the sugar in perspiration match those in blood. Other groups have also developed devices that can analyze biomolecules in sweat ( C&EN, Feb. 1, page 11). The new device uses layers of the fluoropolymer Nafion to absorb sweat and carry it toward the device’s sensors, which
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