Ten-Hour Stable Noninvasive Brain-Computer Interface Realized by Semidry Hydrogel-Based Electrodes  

作　　者：Junchen Liu Sen Lin Wenzheng Li Yanzhen Zhao Dingkun Liu Zhaofeng He Dong Wang Ming Lei Bo Hong Hui Wu 

机构地区：[1]State Key Laboratory of New Ceramics and Fine Poessing,Schoo of Materias Science and Engineering,Tsinghua Uniersiy,Bejing 100084,China [2]State Key Laboratory of Information Photonics and Optical Communications and School of Science Bijing Untiversity of Posts and ecmrurications,Beijjing 100876,China [3]Department of Biomedical Engineering,School of Medicine,Tsinghuua University,Bejjing 100084 China [4]School of Arificial,Beijing University of Posts and Telcommumications,Beijing 10084,China [5]School of Biomedical Enginering,Hainan University,Haikou 570228,China

出　　处：《Research》2022年第2期379-390,共12页研究（英文）

基　　金：supported by the Fundamental Research Funds for the Central Universities under Grant_No.2021XD-A04-1;the Basic Science Center Program of the National Natural Science Foundation of China(NSFC)under Grant No.51788104;and Beijing Natural Science Foundation under Grant No.JQ19005.

摘　　要：Noninvasive brain computer interface(BCI)has been extensively studied from many aspects in the past decade.In order to broaden the practical applications of BCI technique,it is essential to develop electrodes for electroencephalogram(EEG)collection with advanced characteristics such as high conductivity,long term efectiveness,and biocompatibility.In this study,we devcloped a silver-nanowire/PVA hydrogc/mclamine sponge(AgPHMS)semidry EEG electrode for long lasting monitoring of EEG signal.Benefiting from the water storage capacity of PVA hydrogel,the clectrolyte solution can be continuously released to the scalpelctrode interface during used.The electrolyte solution can infiltrate the stratum corneum and reduce the scalp-electrode impedance to 10k0-15k0.The flexible structure enabls the electrode with mechanical stability,increases the wearing comfort,and reduces the scalp-electrode gap to reduce contact impedance.As a result,a long-term BCI application based on measurements of motion-onset visual evoked potentials(mVEPs)shows that the 3-hour BCI accuracy of the new electrode(77%to 100%)is approximately the same as that of conventional eletrodes supported by a conductive gel during the first hour.Furthermore,the BCI system based on the new electrode can retain low contact impedance for 10 hours on scalp,which greatly improved the ability of BCI technique.

关 键 词：technique electrode IMPEDANCE 

分 类 号：TQ427.26[化学工程]