Science Daily April 17, 2019
An international team of researchers (China, USA – Caltech, UC Davis) demonstrates a flexible and skin-mounted band that combines superhydrophobic-superhydrophilic microarrays with nanodendritic colorimetric biosensors toward in situ sweat sampling and analysis. On the superwettable bands, the superhydrophobic background could confine microdroplets into superhydrophilic microwells. The secreted sweat is repelled by the superhydrophobic silica coating and precisely collected and sampled onto the superhydrophilic micropatterns which provides an independent “vessel” toward cellphone-based sweat biodetection. Such wearable, superwettable band-based biosensors could significantly enhance epidemical sweat sampling in well-defined sites, holding promise for facile and noninvasive biofluids analysis…read more. Open Access TECHNICAL ARTICLE
Biosensor bandage before (left) and after (right) sweat secretion. Credit: American Chemical Society