Highly shape adaptive fiber based electronic skin for sensitive joint motion monitoring and tactile sensing

Zhu, Miaomiao; Lou, Mengna; Abdalla, Ibrahim; Yu, Jianyong; Li, Zhaoling; Ding, Bin

doi:10.1016/j.nanoen.2019.104429

Cited by 163 publications

(118 citation statements)

References 39 publications

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“…The prepared material offers excellent piezoelectric characteristics and ultra-high sensitivity even at small pressure (0.1 Pa). Based on this work, to design a tactile sensor with high sensitivity and shape adaptability, Ding et al developed a piezoelectric response of sensing layer by coaxial electrospinning, [ 250 ] which largely was enhanced through the synergistic effect of barium titanate nanoparticles and graphene oxide nanosheets in a hybrid coaxial structure. Besides the highly shape adaptive without sacrificing its sensing capability, the mapping sensors were capable of sensitively discriminating the flexion and extension of various synovial joints.…”

Section: Manufacturing Approachesmentioning

confidence: 99%

Materials, Electrical Performance, Mechanisms, Applications, and Manufacturing Approaches for Flexible Strain Sensors

Han

Chen

et al. 2021

Nanomaterials

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With the recent great progress made in flexible and wearable electronic materials, the upcoming next generation of skin-mountable and implantable smart devices holds extensive potential applications for the lifestyle modifying, including personalized health monitoring, human-machine interfaces, soft robots, and implantable biomedical devices. As a core member within the wearable electronics family, flexible strain sensors play an essential role in the structure design and functional optimization. To further enhance the stretchability, flexibility, sensitivity, and electricity performances of the flexible strain sensors, enormous efforts have been done covering the materials design, manufacturing approaches and various applications. Thus, this review summarizes the latest advances in flexible strain sensors over recent years from the material, application, and manufacturing strategies. Firstly, the critical parameters measuring the performances of flexible strain sensors and materials development contains different flexible substrates, new nano- and hybrid- materials are introduced. Then, the developed working mechanisms, theoretical analysis, and computational simulation are presented. Next, based on different material design, diverse applications including human motion detection and health monitoring, soft robotics and human-machine interface, implantable devices, and biomedical applications are highlighted. Finally, synthesis consideration of the massive production industry of flexible strain sensors in the future; different fabrication approaches that are fully expected are classified and discussed.

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Section: Manufacturing Approachesmentioning

confidence: 99%

Materials, Electrical Performance, Mechanisms, Applications, and Manufacturing Approaches for Flexible Strain Sensors

Han

Chen

et al. 2021

Nanomaterials

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“…These sensors resort to different physical transduction mechanisms including resistivity (i.e., contact resistance), [ 9,10 ] piezoresistivity, [ 11–13 ] capacitance, [ 14–17 ] piezoelectricity, [ 18–21 ] and triboelectricity. [ 22–24 ] Moreover, efforts have been dedicated to designing microstructures, such as pyramids, [ 17,25 ] interlocking, [ 9,18,26 ] and hollow‐sphere [ 11,27 ] to remarkably improve the sensitivity and broaden detection modes of tactile sensors, including normal force, [ 13–23,28 ] shear force, [ 9,10,14 ] bending strain, [ 9,18,28,29 ] temperature, [ 30,31 ] and humidity. [ 31,32 ] Besides, larger‐area, [ 7 ] high‐resolution, [ 9 ] and flexibility [ 33,34 ] are also the desirable characteristics of tactile sensors for artificial electronic skin.…”

Section: Introductionmentioning

confidence: 99%

Skin‐Inspired Piezoelectric Tactile Sensor Array with Crosstalk‐Free Row+Column Electrodes for Spatiotemporally Distinguishing Diverse Stimuli

et al. 2021

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Real‐time detection and differentiation of diverse external stimuli with one tactile senor remains a huge challenge and largely restricts the development of electronic skins. Although different sensors have been described based on piezoresistivity, capacitance, and triboelectricity, and these devices are promising for tactile systems, there are few, if any, piezoelectric sensors to be able to distinguish diverse stimuli in real time. Here, a human skin‐inspired piezoelectric tactile sensor array constructed with a multilayer structure and row+column electrodes is reported. Integrated with a signal processor and a logical algorithm, the tactile sensor array achieves to sense and distinguish the magnitude, positions, and modes of diverse external stimuli, including gentle slipping, touching, and bending, in real time. Besides, the unique design overcomes the crosstalk issues existing in other sensors. Pressure sensing and bending sensing tests show that the proposed tactile sensor array possesses the characteristics of high sensitivity (7.7 mV kPa−1), long‐term durability (80 000 cycles), and rapid response time (10 ms) (less than human skin). The tactile sensor array also shows a superior scalability and ease of massive fabrication. Its ability of real‐time detection and differentiation of diverse stimuli for health monitoring, detection of animal movements, and robots is demonstrated.

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“…By implementing letter and word prediction algorithms, a further increase in typing speed can be expected [27]. In recent years, there have been many studies on skin-compatible, body-worn devices, collectively referred to as wearable electronics, for applications ranging from energy harvesting to human health and motion monitoring [28][29][30][31][32][33][34]. In a second demonstration, we have investigated the potential of the developed graphene textile-based wearable system as an assistive device to remotely control objects, including the steering of a wheelchair using eye movements, which is critical for ALS patients.…”

Section: Resultsmentioning

confidence: 99%

Toward graphene textiles in wearable eye tracking systems for human–machine interaction

Golparvar¹,

Yapıcı²

2021

Beilstein J. Nanotechnol.

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The study of eye movements and the measurement of the resulting biopotential, referred to as electrooculography (EOG), may find increasing use in applications within the domain of activity recognition, context awareness, mobile human–computer and human–machine interaction (HCI/HMI), and personal medical devices; provided that, seamless sensing of eye activity and processing thereof is achieved by a truly wearable, low-cost, and accessible technology. The present study demonstrates an alternative to the bulky and expensive camera-based eye tracking systems and reports the development of a graphene textile-based personal assistive device for the first time. This self-contained wearable prototype comprises a headband with soft graphene textile electrodes that overcome the limitations of conventional “wet” electrodes, along with miniaturized, portable readout electronics with real-time signal processing capability that can stream data to a remote device over Bluetooth. The potential of graphene textiles in wearable eye tracking and eye-operated remote object interaction is demonstrated by controlling a mouse cursor on screen for typing with a virtual keyboard and enabling navigation of a four-wheeled robot in a maze, all utilizing five different eye motions initiated with a single channel EOG acquisition. Typing speeds of up to six characters per minute without prediction algorithms and guidance of the robot in a maze with four 180° turns were successfully achieved with perfect pattern detection accuracies of 100% and 98%, respectively.

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Highly shape adaptive fiber based electronic skin for sensitive joint motion monitoring and tactile sensing

Cited by 163 publications

References 39 publications

Materials, Electrical Performance, Mechanisms, Applications, and Manufacturing Approaches for Flexible Strain Sensors

Materials, Electrical Performance, Mechanisms, Applications, and Manufacturing Approaches for Flexible Strain Sensors

Skin‐Inspired Piezoelectric Tactile Sensor Array with Crosstalk‐Free Row+Column Electrodes for Spatiotemporally Distinguishing Diverse Stimuli

Toward graphene textiles in wearable eye tracking systems for human–machine interaction

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