Reusable free-standing hydrogel electronic tattoo sensors with superior performance  

作　　者：Shuyun Zhuo Alexandre Tessier Mina Arefi Anan Zhang Chris Williams Shideh Kabiri Ameri 

机构地区：[1]Department of Electrical and Computer Engineering,Queen’s University,Kingston,ON,Canada [2]Centre for Neuroscience Studies,Queen’s University,Kingston,ON,Canada

出　　处：《npj Flexible Electronics》2024年第1期397-407,共11页npj-柔性电子(英文)

基　　金：supported by the Natural Sciences and Engineering Research Council of Canada(NSERC),under the PI’s NSERC Discovery Grant and Canada Foundation for Innovation(CFI)grant(40336).

摘　　要：Recently electronic tattoo sensors have attractedimmense interest for healthmonitoring mainly due to their higher sensing performance than conventional dry sensors,owing to the ultra-low thickness which results in their conformability to the skin.However,their performance is worse than wet sensors.Further,these electronic tattoo sensors are not durable and reusable when free-standing because of their low thickness and being too delicate.Here,we report a remarkably high-performance freestanding,reusable,ultrathin and ultra-soft electronic tattoo sensor made of parylene-hydrogel double layer system with high water retention over extended periods that can be used for the extended period of 6 months.The hydrogel electronic tattoo(HET)sensors consist of electrically conductive self-adhesive hydrogel with a thickness of 20μm and Young’s modulus of only 31 kPa at 37℃,allowing for ultra-conformal contact to the skin microscopic features.Our HET sensors are fabricated using a scalable cost-effective method on ordinary tattoo papers and are laminated on the skin like temporary tattoos and were used for electrophysiological signals recording such as electrocardiography(ECG),electromyography(EMG),and skin hydration,temperature sensing.The HET sensors,for the first time,show 234%lower sensor-skin interface impedance(SSII)and significantly lower susceptibility to motion than gold standard medical grade silver/silver chloride wet gel electrodes which are known to have the lowest SSII and susceptibility to motion.Further,the low HET-skin interface impedance leads to a considerably larger signal amplitude and signal-to-noise ratio(SNR)of the electrophysiological signals recorded using HET sensors in comparison with those obtained using gold standard medical grade silver/silver chloridewet gel electrodes.The SNR of some types of electrophysiological signals such as EMG recorded using HET is up to 19 dB higher than gold standardmedical grade electrodes due to higher signal amplitude,significantly lower susceptibility of HET to

关 键 词：silver ELECTRONIC PERFORMANCE 

分 类 号：TP2[自动化与计算机技术—检测技术与自动化装置]