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A health monitoring wearable that operates without a battery

Graphical summary. Credit: Nano Vitality (2022). DOI: 10.1016/j.nanoen.2022.107511

A brand new self-powered, wristwatch-style well being monitor invented by researchers on the University of California, Irvine can hold monitor of a wearer’s pulse and wirelessly talk with a close-by smartphone or pill—while not having an exterior energy supply or a battery.

In a paper revealed just lately within the journal Nano Vitality, workforce members in UCI’s Henry Samueli College of Engineering describe their invention, constructed through 3D printing of nanomaterials on flexible substrates for real-time and wi-fi monitoring of significant indicators. The present prototype serves as a self-powered radial artery pulse monitor, however different points of well being—corresponding to heart rate, physique temperature or blood pressure—may be gauged by merely altering the sensor circuitry, in line with the paper’s authors.

“Imagine you’re out working in a remote location—anywhere, the desert on a mission, in mountains hiking or even a space station, for example—and you need to keep track of your health information on demand, or there’s an incident, and you need to monitor someone’s vital signs urgently and accurately. This self-powered and wireless device allows you to do that without relying on a battery that can lose its charge and has the thermal runaway issue [overheating of lithium-ion batteries that can lead to combustion],” stated senior co-author Rahim Esfandyar-Pour, UCI assistant professor {of electrical} engineering and laptop science and biomedical engineering.

The machine delivers well being info in two methods. In a single mode, the vitality created by tapping the wristband’s nano vitality mills powers up the sensor circuitry, and shortly the wearer’s pulse price seems as flashing indicators on an LED show. The second mode works when a smartphone or comparable machine is held close to the wearable. Embedded near-field communication expertise facilitates the wi-fi change of each energy and knowledge between the wristband and the cell machine, and biophysical info is plotted and displayed on the smartphone’s display screen.

The on-demand and self-powered traits of the invention are made potential by triboelectric nanogenerators that produce voltage by mechanical thumping or strain. The TENGs are fabricated utilizing titanium-based MXenes, a comparatively new class of ultrathin 2D materials with distinctive electrical and mechanical properties. Just a few atoms thick, MXene layers are bendable, are stretchable and may be printed onto the floor of versatile, bandage-like materials or a wearable arm- or wristband.

“This innovation achieves many significant outcomes in one package,” Esfandyar-Pour stated. “It enables continuous, battery-free, wireless and on-demand health monitoring anytime and anywhere. It’s made with low-cost and flexible materials and can be tailored to meet a variety of wearable bioelectronic sensors’ requirements. It’s a flexible, completely configurated system.”

Further authors on the paper are Prativa Das and Sang Received Lee, UCI postdoctoral students in electrical engineering and laptop science; and UCI Ph.D. college students Qian Yi, Xiaochang Pei and Huiting Qin.

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Extra info:
Qian Yi et al, A self-powered triboelectric MXene-based 3D-printed wearable physiological biosignal sensing system for on-demand, wi-fi, and real-time well being monitoring, Nano Vitality (2022). DOI: 10.1016/j.nanoen.2022.107511

A well being monitoring wearable that operates with no battery (2022, July 13)
retrieved 13 July 2022

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