Article
Nanoscience & Nanotechnology
Junshi Li, Yundong Ma, Dong Huang, Zhongyan Wang, Zhitong Zhang, Yingjie Ren, Mengyue Hong, Yufeng Chen, Tingyu Li, Xiaoyi Shi, Lu Cao, Jiayan Zhang, Bingli Jiao, Junhua Liu, Hongqiang Sun, Zhihong Li
Summary: The researchers have developed a flexible MNA electrode that can fit a curved body surface, penetrate the skin without fracture, and be mass-produced with a simplified process. The electrode is compatible with wearable wireless systems and has a short preparation time, improving the comfort and convenience of electrophysiological recording.
NANO-MICRO LETTERS
(2022)
Article
Engineering, Multidisciplinary
Hui-Ling Peng, Yue-ling Sun, Cheng Bi, Quan-Fu Li
Summary: A flexible dry electrode based on MXene ink and flexible polyimide substrate was developed, which can accurately record biopotential signals such as ECG, EEG, and EOG, and has good flexibility and adaptability.
Article
Neurosciences
Patrique Fiedler, Carlos Fonseca, Eko Supriyanto, Frank Zanow, Jens Haueisen
Summary: The new dry 256-channel HD-EEG electrode cap overcomes the principal limitations of HD-EEG in terms of preparation complexity, allowing rapid application by non-medically trained individuals, and enabling new use cases for HD-EEG. The dry electrodes make recording with state-of-the-art EEG amplifiers easier, while also demonstrating superior performance and wearing comfort.
HUMAN BRAIN MAPPING
(2022)
Article
Nanoscience & Nanotechnology
Yue Hou, Zhaoyu Li, Ziyu Wang, Hongyu Yu
Summary: In long-term health monitoring, a flexible MAE on a Miura-ori structured substrate demonstrates superior accuracy and long-term stability in bio-signal recordings such as ECG and EMG. The device shows enhanced performance in device reliability and air ventilation through two-directional in-plane bendability and air-circulating channels, indicating great potential in health monitoring applications.
MICROSYSTEMS & NANOENGINEERING
(2021)
Article
Chemistry, Analytical
Yiping Huang, Yatong Song, Li Gou, Yuanwen Zou
Summary: Wearable flexible silver electrodes based on cowhide were prepared and tested for their waveform transmission and impedance. The results showed that these electrodes were comparable to standard gel electrodes when the skin is moist enough, and had higher signal-to-noise ratios than the standard electrodes in the standing posture.
Article
Engineering, Electrical & Electronic
Penghai Li, Juanjuan Huang, Mingji Li, Hongji Li
Summary: In this study, PDMS filled with copper sulphate crystals, TiO2 nanoparticles, and carbon nanotubes was used as a flexible matrix to fabricate semi-dry multi-claws and 19-channel electrodes for EEG recording. These flexible electrodes showed good adhesion and reduced contact resistance, resulting in accurate and stable EEG signal recording.
SENSORS AND ACTUATORS A-PHYSICAL
(2022)
Article
Engineering, Biomedical
Surachoke Thanapitak, Wanlop Surakampontorn, Chutham Sawigun
Summary: A current-balance instrumentation amplifier (CBIA) is proposed, which eliminates the need for input stage linearization and achieves low input-referred noise. This design uses two transistors to simultaneously operate as input transconductance stage and dc-servo loop (DSL), achieving sub-Hz high-pass cutoff frequency for dc rejection. The fabricated CBIA demonstrates good performance with an input-referred noise of 0.91 μV-rms over 100 Hz bandwidth.
IEEE TRANSACTIONS ON BIOMEDICAL CIRCUITS AND SYSTEMS
(2023)
Article
Biochemical Research Methods
Weiyang Yang, Yan Gong, Cheng-You Yao, Maheshwar Shrestha, Yaoyao Jia, Zhen Qiu, Qi Hua Fan, Arthur Weber, Wen Li
Summary: Integrative neural interfaces combining neurophysiology, optogenetics, and neural imaging offer opportunities for studying neural circuits in the brain. The development of ultra-flexible, highly conductive and fully transparent microscale electrocorticogram (mu ECoG) electrode arrays with PEDOT:PSS-ITO-Ag-ITO assembly shows enhanced mechanical flexibility, robustness, and resilience to photon-induced artifacts. In vivo experiments demonstrate successful recording of light-evoked ECoG oscillations from the primary visual cortex (V1) of an anesthetized rat.
Article
Engineering, Electrical & Electronic
Xin Tang, Hao Shen, Siyuan Zhao, Na Li, Jia Liu
Summary: Flexible electronics have potential applications in the development of brain-computer interfaces, addressing the limitations of traditional rigid electronics. They offer unique advantages in terms of flexibility, stretchability, and softness, impacting neuroscience, neuroprosthetic control, bioelectronic medicine, and brain and machine intelligence integration. Challenges regarding materials, device fabrication, and system integration need to be addressed to develop flexible brain-computer interfaces with broad applicability.
NATURE ELECTRONICS
(2023)
Article
Chemistry, Analytical
Mohammad Shamim Reza, Lu Jin, You Jeong Jeong, Tong In Oh, Hongdoo Kim, Kap Jin Kim
Summary: This study aims to find suitable base materials for dry electrode fabrication in order to achieve high accuracy and maintain electrode performance for long-term bioelectric potential monitoring after electroless silver plating. Nanoweb-based chlorinated polyisoprene (CPI) and poly(styrene-b-butadiene-b-styrene) (SBS) rubber were selected as promising candidates due to their excellent elastic properties and nanofibril nature. The electroless silver plating technique was used to coat the nanofiber web, resulting in the fabrication of silver nanoweb (AgNW)-based dry electrodes. Thorough investigations were conducted to evaluate the key electrode properties of AgNW dry electrodes, and human testing showed comparable performance to commercial Ag/AgCl gel electrodes, with superior long-term stability.
Review
Chemistry, Analytical
C. M. Vidhya, Yogita Maithani, Jitendra P. P. Singh
Summary: The technology of wearable medical equipment has advanced to the point where it is now possible to monitor the electrocardiogram and electromyogram comfortably at home. Fabrics or textiles, which were once meant to protect the human body, have been developed into intelligent textile materials for healthcare monitoring. Conductive textile electrodes provide breathability and comfort, and recent advancements have been made in their fabrication for biopotential signal monitoring.
Article
Nanoscience & Nanotechnology
Yang Wang, Qifan Wang, Ruichen Zheng, Xinxiu Xu, Xinze Yang, Qiang Gui, Xiaowei Yang, Yijun Wang, He Cui, Weihua Pei
Summary: Flexible electrodes have shown better compatibility and functionality compared to rigid electrodes. Nonhuman primates, which have similar brain structures and functions to humans, are more suitable as animal models for potential clinical usage than rodents. However, there are limited studies regarding the application of flexible electrodes on nonhuman primates.
MICROSYSTEMS & NANOENGINEERING
(2023)
Article
Computer Science, Information Systems
Jinpyeo Jeung, Inyeol Yun, Yunsik Kim, Suwon Seong, Yoonyoung Chung
Summary: In this study, hierarchically structured flexible electrodes (HSFE-PI) were fabricated on polyimide substrate using micro-casting technique and gold nanoparticles electrodeposition. The HSFE-PI was applied for electromyogram and glucose sensing applications, resulting in high sensitivity enhancement.
Article
Neurosciences
Beatriz Vasconcelos, Patrique Fiedler, Rene Machts, Jens Haueisen, Carlos Fonseca
Summary: The novel dry arch electrode proposed in this study provides increased comfort for prolonged dry-contact measurement and shows comparable signal characteristics with dry pin-shaped electrodes.
FRONTIERS IN NEUROSCIENCE
(2021)
Article
Energy & Fuels
Sibel Yazar, Busra Arvas, Melih Besir Arvas, Cigdem Yolacan, Yucel Sahin
Summary: This study presents a supercapacitor designed for flexible and wearable textile systems operating in environments similar to biological fluids. The supercapacitor exhibits high specific capacitance, good charging/discharging stability, and high energy density, making it suitable for wearable electronic systems.
JOURNAL OF ENERGY STORAGE
(2023)