Wireless Soft Scalp Electronics and Virtual Reality System for Motor Imagery‐Based Brain–Machine Interfaces (Adv. Sci. 19/2021)

Mahmood, Musa; Kwon, Shinjae; Kim, Hojoong; Kim, Yun‐Soung; Siriaraya, Panote; Choi, Jeongmoon J.; Otkhmezuri, Boris; Kang, Kyungran; Jang, Young C.; Ang, Chee Siang; Yeo, Woon‐Hong

doi:10.1002/advs.202170126

Cited by 6 publications

(4 citation statements)

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“…EEG signals are usually collected by conventional caps with rigid multichannel electrodes, which lack of portability, are uncomfortable, and often fail to collect high‐quality signals due to unstable contact and weak connection with target tissue, especially when the subject moves. [ 18,19 ]…”

Section: Introductionmentioning

confidence: 99%

Hydrogel Nanoarchitectonics of a Flexible and Self‐Adhesive Electrode for Long‐Term Wireless Electroencephalogram Recording and High‐Accuracy Sustained Attention Evaluation

et al. 2023

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Hydrogels are ideal building blocks to fabricate the next generation of electrodes for acquiring high‐quality physiological electrical signals, for example, electroencephalography (EEG). However, collection of EEG signals still suffers from electrode deformation, sweating, extensive body motion and vibration, and environmental interference. Herein, polyvinyl alcohol and polyvinylpyrrolidone are selected to prepare a hydrogel network with tissue‐like modulus and excellent flexibility. Additionally, polydopamine nanoparticles, obtained by polydopamine peroxidation, are integrated into the hydrogel to endow them with higher transparency, higher self‐adhesion, and lower impedance. Consequently, a multichannel and wirelessly operated hydrogel electrode can establish a conformal and stable interface with tissue and illustrate high channel uniformity, low interfacial contact impedance, low power noise, long‐term stability, and a tolerance to sweat and motion. Furthermore, the hydrogel electrode shows the unprecedented ability to classify the recorded high‐quality prefrontal EEG signals into seven‐category sustained attention with high accuracy (91.5%), having great potential applications in the assessment of human consciousness and in multifunctional diagnoses.

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Section: Introductionmentioning

confidence: 99%

Hydrogel Nanoarchitectonics of a Flexible and Self‐Adhesive Electrode for Long‐Term Wireless Electroencephalogram Recording and High‐Accuracy Sustained Attention Evaluation

et al. 2023

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“…Recently studies about monitoring human physiological signals have attracted substantial research interest because of their potential for application in human–machine interface, [ 1 ] disease diagnosis, [ 2 ] patient monitoring in clinic, telemedicine, and mental state monitoring. [ 3 ] However, the sensors that are commonly used have hindered their conformal contact with skin and user's comfort because these sensors are bulky, rigid, and wired.…”

Section: Introductionmentioning

confidence: 99%

Advances in Ultrathin Soft Sensors, Integrated Materials, and Manufacturing Technologies for Enhanced Monitoring of Human Physiological Signals

Kim

Lee

Byun

et al. 2023

Adv Elect Materials

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Recent advances in soft sensors and flexible electronics offer various applications in detecting physical, electrical, and chemical signals. However, there are still technical barriers in current mechanical, electrical, and material properties for enhanced signal sensing. When measuring signals from the human skin, minimizing the skin‐sensor contact impedance is still challenging while maximizing sensitivity through optimized materials and soft electronics. Here, this review summarizes recent advances in materials, manufacturing, and integration technologies to develop ultrathin soft sensors for monitoring various human physiological signals. The enhancements in soft and compliant structures and mechanical properties are critical to making reliable wearable electronic systems. This article shares the details of soft sensors, integration processes, manufacturing methods, and their applications to target physical, electrical, and chemical signals. In addition, the limitations and current trends in developing multifunctional sensors, self‐powered devices, and integration with external stimuli systems are discussed.

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“…Recent years have witnessed a surge in research focused on developing innovative biomedical devices. [1][2][3][4][5][6][7] One example is the introduction of specialized wireless physiological monitoring devices suitable for neonatal and pediatric intensivecare units. [1] Related efforts have resulted in the development of implantable devices enabling continuous monitoring of vascular pressure, flow rate, and temperature.…”

Section: Introductionmentioning

confidence: 99%

Versatile On‐Chip Programming of Circuit Hardware for Wearable and Implantable Biomedical Microdevices

Lee,

Leung

et al. 2023

Advanced Science

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Wearable and implantable microscale electronic sensors have been developed for a range of biomedical applications. The sensors, typically millimeter size silicon microchips, are sought for multiple sensing functions but are severely constrained by size and power. To address these challenges, a hardware programmable application‐specific integrated circuit design is proposed and post‐process methodology is exemplified by the design of battery‐less wireless microchips. Specifically, both mixed‐signal and radio frequency circuits are designed by incorporating metal fuses and anti‐fuses on the top metal layer to enable programmability of any number of features in hardware of the system‐on‐chip (SoC) designs. This is accomplished in post‐foundry editing by combining laser ablation and focused ion beam processing. The programmability provided by the technique can significantly accelerate the SoC chip development process by enabling the exploration of multiple internal circuit parameters without the requirement of additional programming pads or extra power consumption. As examples, experimental results are described for sub‐millimeter size complementary metal‐oxide‐semiconductor microchips being developed for wireless electroencephalogram sensors and as implantable microstimulators for neural interfaces. The editing technique can be broadly applicable for miniaturized biomedical wearables and implants, opening up new possibilities for their expedited development and adoption in the field of smart healthcare.

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Wireless Soft Scalp Electronics and Virtual Reality System for Motor Imagery‐Based Brain–Machine Interfaces (Adv. Sci. 19/2021)

Cited by 6 publications

References 0 publications

Hydrogel Nanoarchitectonics of a Flexible and Self‐Adhesive Electrode for Long‐Term Wireless Electroencephalogram Recording and High‐Accuracy Sustained Attention Evaluation

Hydrogel Nanoarchitectonics of a Flexible and Self‐Adhesive Electrode for Long‐Term Wireless Electroencephalogram Recording and High‐Accuracy Sustained Attention Evaluation

Advances in Ultrathin Soft Sensors, Integrated Materials, and Manufacturing Technologies for Enhanced Monitoring of Human Physiological Signals

Versatile On‐Chip Programming of Circuit Hardware for Wearable and Implantable Biomedical Microdevices

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