Recent advances in wearable flexible electronic skin: types, power supply methods, and development prospects

Tian, Hongying; Liu, Chang; Hao, Huimin; Wang, Xiangrong; Chen, Hui; Ruan, Yilei; Huang, Jiahai

doi:10.1080/09205063.2024.2334974

Cited by 3 publications

(1 citation statement)

References 185 publications

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“…With the increasing application of pressure sensors in wearable devices and electronic skin, flexible pressure sensors have attracted the interest of many researchers due to their outstanding flexibility and ductility [ 1 , 2 , 3 , 4 , 5 ]. Currently, flexible pressure sensors are categorized into resistance type, capacitance type, piezoelectric type, and triboelectric type based on their working principle [ 6 , 7 , 8 ].…”

Section: Introductionmentioning

confidence: 99%

A Pressure and Proximity Sensor Based on Laser-Induced Graphene

Ye,

Zhao,

Zhang

2024

Sensors

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Smart wearable devices are extensively utilized across diverse domains due to their inherent advantages of flexibility, portability, and real-time monitoring. Among these, flexible sensors demonstrate exceptional pliability and malleability, making them a prominent focus in wearable electronics research. However, the implementation of flexible wearable sensors often entails intricate and time-consuming processes, leading to high costs, which hinder the advancement of the entire field. Here, we report a pressure and proximity sensor based on oxidized laser-induced graphene (oxidized LIG) as a dielectric layer sandwiched by patterned LIG electrodes, which is characterized by high speed and cost-effectiveness. It is found that in the low-frequency range of fewer than 0.1 kHz, the relative dielectric constant of the oxidized LIG layer reaches an order of magnitude of 104. The pressure mode of this bimodal capacitive sensor is capable of detecting pressures within the range of 1.34 Pa to 800 Pa, with a response time of several hundred milliseconds. The proximity mode involves the application of stimulation using an acrylic probe, which demonstrates a detection range from 0.05 mm to 37.8 mm. Additionally, it has a rapid response time of approximately 100 ms, ensuring consistent signal variations throughout both the approach and withdrawal phases. The sensor fabrication method proposed in this project effectively minimizes expenses and accelerates the preparation cycle through precise control of laser processing parameters to shape the electrode-dielectric layer-electrode within a single substrate material. Based on their exceptional combined performance, our pressure and proximity sensors exhibit significant potential in practical applications such as motion monitoring and distance detection.

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Section: Introductionmentioning

confidence: 99%

A Pressure and Proximity Sensor Based on Laser-Induced Graphene

Ye,

Zhao,

Zhang

2024

Sensors

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A Taxonomy of Low-Power Techniques in Wearable Medical Devices for Healthcare Applications

Tesema,

Jimma,

Khan

et al. 2024

Electronics

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Chronic diseases are the most prevalent and non-communicable health crisis globally. Most chronic disease patients require continuous physiological monitoring, using wearable technology for timely treatment, precise illness detection, and preventive healthcare. Nonetheless, efficient power management is required for such resource-constrained wearable devices. This work aims to analyze low-power techniques (LPTs) in wearable medical devices using a data-driven approach and identify novel approaches promising higher power savings. Through an intensive literature analysis, we identify the most relevant LPTs for minimizing power consumption in wearable devices for physiological monitoring while recognizing the barriers to adopting these techniques. As a result, a novel taxonomy based on the common characteristics of the LPTs is proposed, along with strategies for the combination of LPTs. Through our analysis, we propose possible enhancements in using LPTs and suggest mechanisms for the medical device industry to facilitate their adoption. Overall, our proposed strategies guide the use of LPTs on wearable medical devices toward continuous physiological monitoring.

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A Highly Sensitive Strain Sensor with Self-Assembled MXene/Multi-Walled Carbon Nanotube Sliding Networks for Gesture Recognition

Wang,

Yu,

et al. 2024

Micromachines

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Flexible electronics is pursuing a new generation of electronic skin and human–computer interaction. However, effectively detecting large dynamic ranges and highly sensitive human movements remains a challenge. In this study, flexible strain sensors with a self-assembled PDMS/MXene/MWCNT structure are fabricated, in which MXene particles are wrapped and bridged by dense MWCNTs, forming complex sliding conductive networks. Therefore, the strain sensor possesses an impressive sensitivity (gauge factor = 646) and 40% response range. Moreover, a fast response time of 280 ms and detection limit of 0.05% are achieved. The high performance enables good prospects in human detection, like human movement and pulse signals for healthcare. It is also applied to wearable smart data gloves, in which the CNN algorithm is utilized to identify 15 gestures, and the final recognition rate is up to 95%. This comprehensive performance strain sensor is designed for a wide array of human body detection applications and wearable intelligent systems.

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Recent advances in wearable flexible electronic skin: types, power supply methods, and development prospects

Cited by 3 publications

References 185 publications

A Pressure and Proximity Sensor Based on Laser-Induced Graphene

A Pressure and Proximity Sensor Based on Laser-Induced Graphene

A Taxonomy of Low-Power Techniques in Wearable Medical Devices for Healthcare Applications

A Highly Sensitive Strain Sensor with Self-Assembled MXene/Multi-Walled Carbon Nanotube Sliding Networks for Gesture Recognition

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