Electronic Skin Powered by Sweat Serves as Human-Machine Interface

Researchers have developed electronic skin (e-skin) that is applied directly on top of real skin. Made from soft, flexible rubber, it can be embedded with sensors that monitor information like heart rate, body temperature, levels of blood sugar, and metabolic byproducts that are indicators of health as well as nerve signals that control muscles. It does so without the need for a battery, as it runs solely on biofuel cells powered by one of the body's own waste products.