Researchers at the U.K.'s University of the West of England, Bristol developed flexible electric circuit boards using the mat of cells that form on top when brewing kombucha.
The researchers printed circuits onto the mats after they dried, using either the aerosol jet of a conductive polymer or by laying down a conductive mix of polyester and copper via a three-dimensional printer.
They used a silver-impregnated epoxy adhesive to attach 3- and 5-millimeter LEDs to the circuits, which remained operable despite repeated bending and stretching.
The researchers determined the kombucha circuits were lighter, cheaper, and more flexible than conventional circuits, and are suitable for use in wearable devices.
From New Scientist
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