SCEINCE

A new extension tool generates electricity with small magnets

We have often reported piezoelectric material which can transform stress into electricity, but for now these materials had limited capabilities such as the inability to produce enough energy to be viable or to function if they got a little wet. That’s all that will change.

A new invention consisting of Magnetoelastic generators, composed of a platinum-catalyzed silicone polymer matrix suspended inside which are nanosized neodymium-iron-boron magnets, have been created that results in soft and flexible super-efficient self-propelled bioelectronic devices.

The technology uses movements of the human body to power portable and implantable diagnostic sensors. Even better, it works even when wet, which means that rain or sweat will not deactivate it.

“Our discovery opens a new path for practical energy, sensory and therapeutic technologies that are oriented to the human body and can be connected to the Internet of Things,” said study leader Jun Chen, an assistant professor of bioengineering at the University of California. at Samueli School of Engineering in Los Angeles, in declaration.

“What makes this technology unique is that it allows people to stretch and move comfortably when the device is pressed against human skin, and because it relies on magnetism rather than electricity, humidity and our own sweat. do not compromise its effectiveness. “

Chen and his team further reported that the magnetoelastic effect they observed with their invention was four times larger than hard metal alloy devices of the same size.

In fact, the device generates electric currents of 4.27 milliamperes per square centimeter. This is 10,000 times better than previous conventional technologies.

And there are many other similar technologies that are being tested. Unfortunately, they lack the practicality that Chen’s device offers, either by being too rigid to bend enough to press against the skin, or by relying on static electricity that does not generate enough energy and suffers from moisture.

Meanwhile, Chen’s wearable magnetoelastic generators continued to operate at an excellent level even after being soaked in artificial sweat for a week. Chen and his team have already filed a patent for the technology and look forward to discovering new and useful applications for it.





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