Previous versions of such "epidermal electronics" were often uncomfortable and unwieldy, but John A. Rogers of the University of Illinois and colleagues report in the journal Advanced Materials that they've found a way to eliminate even the stretchy plastic sheet in which the smallest epidermal devices had been embedded. Instead, a rubber stamp delivers a kind of electronic tattoo, which is then covered with a spray-on bandage The device could communicate wirelessly with medical monitoring equipment.
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