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Freeman [soylentnews.org] writes:

https://arstechnica.com/science/2021/09/liquid-metal-encased-in-hydrogel-makes-a-promising-energy-harvesting-device/ [arstechnica.com]

Scientists at North Carolina State University have developed a flexible, stretchy energy-harvesting device solely out of biocompatible soft materials: liquid metal and soft polymers known as hydrogels. It produces small amounts of electricity comparable to other energy-harvesting technologies, and it can also operate in water as well as air, according to the team's recent paper [wiley.com] published in the journal Advanced Materials. The team thinks the new NCSU device holds promise for powering wearable devices, charging them spontaneously with no need for an external power source.
[...]
DOI: Advanced Materials, 2021. 10.1002/adma.202103142 [doi.org] (About DOIs [arstechnica.com]).

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