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  • RESEARCH HIGHLIGHT

While you sleep, a device harvests energy from your sweaty fingertips

An energy collector in contact with the skin is efficient enough to power some electronic devices.
Close up of a finger tip being held against a vitamin C sensor with an electrochromic display reading '4'

A flexible miniature fuel cell uses the sweat on a fingertip to make electricity, which powers a sensor (pictured) that measures vitamin C levels. Credit: Lu Yin

A thin, flexible device worn on a fingertip can harvest energy from a sleeping person’s sweat to power small, wearable electronics.

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Nature 595, 474 (2021)

doi: https://doi.org/10.1038/d41586-021-01916-w

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