A microneedle electrode array on flexible substrate for long-term EEG   monitoring

doi:10.1016/j.snb.2017.01.052

CORC > 北京大学 > 心理与认知科学学院

	A microneedle electrode array on flexible substrate for long-term EEG monitoring
	Wang, Renxin ; Jiang, Xiaoming ; Wang, Wei ; Li, Zhihong
刊名	SENSORS AND ACTUATORS B-CHEMICAL
	2017
关键词	Flexible Microneedle Dry electrode EEG Parylene DRY ELECTRODE FABRICATION SIGNALS SENSOR SYSTEM
DOI	10.1016/j.snb.2017.01.052
英文摘要	Conventional wet electrodes require skin preparation and gel usage to maintain low interface impedance, which limit their applications in long-term monitoring of biopotentials such as electroencephalogram (EEG). To address this problem, microneedle electrode arrays (MNEAs) have been employed as dry electrodes, which could be capable of EEG monitoring without skin abrasion and gel electrolyte. However, most of them are usually based on rigid substrates that are not conformal to curved and moved human skin. Therefore, we develop a flexible parylene-based MNEA (P-MNEA) with silicon microneedles, which could provide not only conformal but also robust contact. Firstly, the microfabrication process is concretely illustrated and makes it repeatable. Then, penetration tests illustrate these microneedles are robust enough to penetrate into epidermis so that impedances of stratum corneum make limited contribution to interface impedance. Consequently, in vivo impedance results verify the priority of P-MNEA in long-time impedance stability. Meanwhile, competitive impedance density of 7.5 K Omega cm(2)@10 Hz is attained. Eventually, EEG recoding results as well as correlation and coherence analyses of P-MNEA indicate comparable performance to that of wet electrode. In brief, these results reveal promising prospect of P-MNEA in long-time EEG monitoring. (C) 2017 Elsevier B.V. All rights reserved.; National Natural Science Foundation of China [91323304, 61604134]; SCI(E); ARTICLE; 750-758; 244
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/473288]
专题	心理与认知科学学院信息科学技术学院
推荐引用方式 GB/T 7714	Wang, Renxin,Jiang, Xiaoming,Wang, Wei,et al. A microneedle electrode array on flexible substrate for long-term EEG monitoring[J]. SENSORS AND ACTUATORS B-CHEMICAL,2017.
APA	Wang, Renxin,Jiang, Xiaoming,Wang, Wei,&Li, Zhihong.(2017).A microneedle electrode array on flexible substrate for long-term EEG monitoring.SENSORS AND ACTUATORS B-CHEMICAL.
MLA	Wang, Renxin,et al."A microneedle electrode array on flexible substrate for long-term EEG monitoring".SENSORS AND ACTUATORS B-CHEMICAL (2017).