Sweat Sensor Detects Inflammation Markers.

Researchers at Caltech have developed a wearable skin sensor that can wirelessly detect the presence of C-reactive protein (CRP) in human sweat, which is a molecular hallmark of inflammation. The sensor is built upon laser-engraved graphene and contains antibodies that bind to CRP and special molecules capable of generating a small electric current under certain conditions. The sensor also measures the concentration of ions in the sweat, the sweat's pH, and skin temperature to account for variations in sweat compositions from person to person. The technology has implications for practical medical applications and chronic disease management.