Battery-free microchip can measure sweat and detect illness

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We’ve seen many great health and medical wearables in the past, including an iodine supplementing bindi and hearing aids in a necklace form. Now using nature’s process of osmosis for inspiration, and flexible electronics materials for execution, scientists from Eindhoven University’s Mechanical Engineering department have produced a wearable microchip that analyzes sweat for a variety of diseases. Built by laser micro-manufacturing, an evaporation-driven pump draws fluid from the skin and across a microchip sensor for analysis. The sweat then passes through the micro-channel and evaporates as it would normally. By measuring the levels of salinity and acidity in sweat, scientists…

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