2024-09-18 マサチューセッツ大学アマースト校
<関連情報>
- https://www.umass.edu/news/article/homemade-play-putty-can-read-bodys-electric-signals-find-umass-researchers
- https://www.cell.com/device/fulltext/S2666-9986(24)00475-7
ふにゃふにゃのバイオ電子回路 Squishy bioelectronic circuits
Alexandra Katsoulakis ∙ Favour Nakyazze ∙ Max Mchugh∙ … ∙ Monil Bhavsar ∙ Om Tank ∙ Dmitry Kireev
Device Published:September 18, 2024
DOI:https://doi.org/10.1016/j.device.2024.100553
Graphical abstract
The bigger picture
We show that squishy circuits (SCs) exhibit a transformative shift in the design and application of bioelectronic devices. SCs, made of simple, inexpensive household materials, effectively bridge the gap between costly medical technology and accessible educational tools. This convergence represents a frontier era of wearable technology that is both cost effective and highly functional, thus broadening the accessibility of advanced healthcare monitoring to wider populations. Our research demonstrates that SCs can effectively measure various biopotentials, including cardiac, neural, muscular, and ocular activity. Intriguingly, these SCs possess self-healing properties and are sensitive to temperature variations. This approach democratizes health monitoring by making it more affordable and accessible.
Highlights
- Squishy circuits provide low-cost bioelectronic interface solutions
- Comparable performance to traditional bioelectronic systems
- Self-healing properties enhance durability
- Effective in EEG, ECG, EMG, and EOG applications
Summary
In the pursuit of advancing wearable bioelectronics, our study introduces Squishy Circuits (SCs) as a promising low-cost biointerface electrode material, particularly for electrophysiological applications. Addressing the essential need for low-impedance interfaces in electrophysiological measurements, we explore the conductivity and resistance of various SCs and put them to the test against classical bioelectronic systems. Notably, SCs exhibit self-healing properties that enhance their durability and functionality. Electrochemically, SCs show normalized impedance (at 1 kHz) of 3.4 ± 0.6 kΩ, which is 4 times lower (better) compared to that of copper and 10 times lower compared to Ag/AgCl gel electrodes. Our findings demonstrate that SCs are a viable and effective alternative for wearable electrophysiology, such as monitoring the brain and cardiac activities, with signal-to-noise ratios up to 115, while being simple to produce and apply. This study highlights the potential of SCs to revolutionize wearable bioelectronics by offering an affordable, robust, and user-friendly biointerface electrode material.
