An intelligent nanomesh-reinforced graphene pressure sensor with an ultra large linear range

Qiao, Yancong; Jian, Jinming; Tang, Hao; Ji, Shourui; Liu, Ying; Liu, Haidong; Li, Yuanfang; Li, Xiaoshi; Han, Fei; Liu, Zhiyuan; Cui, Tianrui; Gou, Guangyang; Jiang, Lelun; Yang, Yi; Zhou, Boyu; Ren, Tian‐Ling; Zhou, Jianhua

doi:10.1039/d1ta09813f

Cited by 25 publications

(18 citation statements)

References 48 publications

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“…Writing is a common activity in life that allows information to be recorded and analyzed. Therefore, in the human–computer interaction system, converting the writing signal collected by the device of recording handwriting into text has attracted wide attention . Studies have shown that the hydrogel sensor can be applied as the carrier of handwriting to identify the content of human writing .…”

Section: Resultsmentioning

confidence: 99%

Self-Adhesive, Anti-Freezing MXene-Based Hydrogel Strain Sensor for Motion Monitoring and Handwriting Recognition with Deep Learning

Ma,

Zhang,

Wang

et al. 2023

ACS Appl. Mater. Interfaces

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Flexible strain sensors based on self-adhesive, high-tensile, super-sensitive conductive hydrogels have promising application in human–computer interaction and motion monitoring. Traditional strain sensors have difficulty in balancing mechanical strength, detection function, and sensitivity, which brings challenges to their practical applications. In this work, the double network hydrogel composed of polyacrylamide (PAM) and sodium alginate (SA) was prepared, and MXene and sucrose were used as conductive materials and network reinforcing materials, respectively. Sucrose can effectively enhance the mechanical performance of the hydrogels and improve the ability to withstand harsh conditions. The hydrogel strain sensor has excellent tensile properties (strain >2500%), high sensitivity with a gauge factor of 3.76 at 1400% strain, reliable repeatability, self-adhesion, and anti-freezing ability. Highly sensitive hydrogels can be assembled into motion detection sensors that can distinguish between various strong or subtle movements of the human body, such as joint flexion and throat vibration. In addition, the sensor can be applied in handwriting recognition of English letters by using the fully convolutional network (FCN) algorithm and achieved the high accuracy of 98.1% for handwriting recognition. The as-prepared hydrogel strain sensor has broad prospect in motion detection and human–machine interaction, which provides great potential application of flexible wearable devices.

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Section: Resultsmentioning

confidence: 99%

Self-Adhesive, Anti-Freezing MXene-Based Hydrogel Strain Sensor for Motion Monitoring and Handwriting Recognition with Deep Learning

Ma,

Zhang,

Wang

et al. 2023

ACS Appl. Mater. Interfaces

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“…In addition, a comparison of the sensing performance in terms of linearity, sensitivity, and linear range between the RLS sensor and other previously reported highly linear pressure sensors was conducted, as shown in Figure S23 and Table S1. Our sensor has achieved outstanding performance in ultra-broad linear pressure sensing, which, to the best of our knowledge, has not been previously reported and has been challenged. ,,,,,− Furthermore, a comparison with other 3D printed flexible porous sensors was conducted and listed in Table S2, demonstrating its distinguishable characters with broad linear range, compact size, and without 3D model design. − ,− …”

Section: Resultsmentioning

confidence: 86%

Ultra-Broad Linear Range and Sensitive Flexible Piezoresistive Sensor Using Reversed Lattice Structure for Wearable Electronics

Bang

Chun

Lim

et al. 2023

ACS Appl. Mater. Interfaces

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Flexible pressure sensors have attracted significant attention owing to their broad applicability in wearable electronics and human–machine interfaces. However, it is still challenging to simultaneously achieve a broad sensing range and high linearity. Here, we present a reversed lattice structure (RLS) piezoresistive sensor obtained through a layer-level engineered additive infill structure via conventional fused deposition modeling three-dimensional (3D) printing. The optimized RLS piezoresistive sensor attained a pressure sensing range (0.03–1630 kPa) with high linearity (coefficient of determination, R 2 = 0.998) and sensitivity (1.26 kPa–1) due to the structurally enhanced compressibility and spontaneous transition of dominant sensing mechanism of the sensor. It also exhibited great mechanical/electrical durability and a rapid response/recovery time (170/70 ms). This remarkable performance enables the detection of various human motions over a broad spectrum, from pulse detection to human walking. Finally, a wearable electronic glove was developed to analyze the pressure distribution in various situations, thereby demonstrating its applicability in multipurpose wearable electronics.

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“…Flexible pressure sensors have attracted widespread attention owing to their great potential applications in health monitoring, − human–machine interactions, − and electronic skin. − Piezoresistive pressure sensors show great advantages over other types of flexible pressure sensors, including a facile fabrication process, simple readout circuits, and low power consumption. − For the sensitivity ( S ) of a piezoresistive sensor, usually, it is defined as the change in electrical current relative to an applied pressure ( P ), namely, S = normalΔ I − I 0 P , where Δ I and I 0 represent the current change under the applied pressure and the initial current without pressure applied, respectively. According to the definition, if the current is capable of changing considerably at low pressure, then the sensor possesses a high sensitivity but a narrow sensing range.…”

Section: Introductionmentioning

confidence: 99%

Gradient Cu/Ti₃C₂T_x MXene-Coated Textile Pressure Sensor with High Sensitivity and a Wide Sensing Range

Bai

Zhang

et al. 2023

ACS Appl. Nano Mater.

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As a fundamental component for health monitoring, human− machine interactions, and electronic skin, a flexible pressure sensor always faces the challenge of either a limited sensing range or inferior sensitivity. To overcome the trade-off between high sensitivity and a wide sensing range, here, we constructed a mass-gradient distribution of Cu onto a textile coated with Ti 3 C 2 T x nanosheets through an additive-assisted electrodeposition technique. The synergistic effects of the flexible and knitted structural textile substrate and the mass-gradient distribution of the as-deposited Cu gave a continuous change in not only the contact area but the conductivity of the contact points of the sensor under compressive loading. Thus, the sensor exhibited both a high sensitivity of up to 67.91 kPa −1 and a wide sensing range of 905 kPa, simultaneously. In addition, the sensor demonstrated excellent cycling stability after 1000 cyclic loadings, a fast response/recovery time of 30/50 ms, and excellent breathability, which endows it with wide applications, including monitoring human physiological signals, transmitting encrypted information, and distinguishing the spatial distribution of pressure in real time.

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An intelligent nanomesh-reinforced graphene pressure sensor with an ultra large linear range

Abstract: Pressure sensor is an important device in daily life, especially for the physiological signal monitoring. However, to realize the intelligent pressure sensor, more features should be achieved, such as high...

Cited by 25 publications

References 48 publications

Self-Adhesive, Anti-Freezing MXene-Based Hydrogel Strain Sensor for Motion Monitoring and Handwriting Recognition with Deep Learning

Self-Adhesive, Anti-Freezing MXene-Based Hydrogel Strain Sensor for Motion Monitoring and Handwriting Recognition with Deep Learning

Ultra-Broad Linear Range and Sensitive Flexible Piezoresistive Sensor Using Reversed Lattice Structure for Wearable Electronics

Gradient Cu/Ti₃C₂T_x MXene-Coated Textile Pressure Sensor with High Sensitivity and a Wide Sensing Range

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An intelligent nanomesh-reinforced graphene pressure sensor with an ultra large linear range

Abstract: Pressure sensor is an important device in daily life, especially for the physiological signal monitoring. However, to realize the intelligent pressure sensor, more features should be achieved, such as high...

Cited by 25 publications

References 48 publications

Self-Adhesive, Anti-Freezing MXene-Based Hydrogel Strain Sensor for Motion Monitoring and Handwriting Recognition with Deep Learning

Self-Adhesive, Anti-Freezing MXene-Based Hydrogel Strain Sensor for Motion Monitoring and Handwriting Recognition with Deep Learning

Ultra-Broad Linear Range and Sensitive Flexible Piezoresistive Sensor Using Reversed Lattice Structure for Wearable Electronics

Gradient Cu/Ti3C2Tx MXene-Coated Textile Pressure Sensor with High Sensitivity and a Wide Sensing Range

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Gradient Cu/Ti₃C₂T_x MXene-Coated Textile Pressure Sensor with High Sensitivity and a Wide Sensing Range