Electronic skin sensor detects heatstroke danger

A tattoo-like sensor system that sticks to the skin and can indirectly tell the body's hydration level could help prevent heat strokes. The research team behind this invention demonstrated a completely new, versatile strategy to integrate pH sensing elements with high quality, physically transferable PDMS freestanding nanosheets. These sensor stickers can adhere to the skin without any glue. The simple structure of this sensor combined with a thin film pH sensor offers a unique advantage in testing in situ heatstroke detection.