Wearable sensors can be printed directly onto skin at room temperature

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An example of the new wearable sensor developed at Penn State University

Flexible electronics have opened up some interesting possibilities when it comes to wearable sensors that can be applied to the skin, taking the form of tattoo-like films and sleeves that monitor various aspects of human health. Scientists at Penn State University have now developed one they say can be safely printed directly onto the skin, where it can track things like body temperature and blood oxygen levels, before being washed off once the job is done.

The new printable sensors build on earlier work by the same researchers, in which they developed flexible circuit boards for use in wearable sensors. But a key part of this process involved bonding some of the metallic components together at the kinds of temperatures not well tolerated by the human body, at around 572 °F (300 °C).

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A stretchable battery, powered by sweat, could revolutionize wearables

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Whether it’s the AA batteries that go in TV remotes or the lithium-ion batteries found in smartphones, you probably have a pretty definite image that springs to mind when someone mentions “battery.” That could soon change, however, based on research coming out of the Binghamton University in New York, where scientists have developed a stretchy, textile-based, bacteria-powered bio-battery that could one day be used to power wearable devices. In demonstrations, the battery was shown to be able to exhibit stable electricity-generating capabilities even after repeated stretching and twisting cycles.

 

Continue reading… “A stretchable battery, powered by sweat, could revolutionize wearables”