Porous graphene foam composite-based dual-mode sensors for underwater temperature and subtle motion detection

Chen, Xue; Li, Runze; Niu, Guangyu; Xin, Mingyang; Xu, Guizhi; Cheng, Huanyu; Yang, Li

doi:10.1016/j.cej.2022.136631

Cited by 106 publications

(57 citation statements)

References 60 publications

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“…Moreover, the functions of flexible wearable sensors are increasingly rich, and many flexible sensors for multi-modal detection have been developed . For example, Yang and co-workers reported a flexible sensor for underwater motion monitoring that simultaneously detects strain and temperature . Therefore, the development of high-performance and multi-functional flexible pressure sensors is imminent.…”

Section: Introductionmentioning

confidence: 99%

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Wearable Pressure Sensor Array with Layer-by-Layer Assembled MXene Nanosheets/Ag Nanoflowers for Motion Monitoring and Human–Machine Interfaces

Zhang

Bao

et al. 2022

ACS Appl. Mater. Interfaces

138

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Recently, wearable sensors and electronic skin systems have become prevalent, which can be employed to detect the movement status and physiological signals of wearers. Here, a pressure sensor composed of mesh-like micro-convex structure polydimethylsiloxane (PDMS), MXene nanosheet/Ag nanoflower (AgNF) films, and flexible interdigital electrodes was designed by layer-by-layer (LBL) assembly. The unique microstructure of PDMS effectively increases the contact area and improves sensitivity. Moreover, AgNFs were introduced into the MXene as a “bridge,” and the synergistic effect of the two further enhanced the performance of the sensor. The pressure sensor has high sensitivity (191.3 kPa–1), good stability (18,000 cycles), fast response/recovery time (80 ms/90 ms), and low detection limit (8 Pa), so it can be used for all-round monitoring of the human body. Sensing arrays were integrated with a wireless transmitter as an intelligent artificial electronic skin for spatial pressure mapping and human–computer interaction sensing. Moreover, we develop a smart glove by a simple method, combining it with a 3D model for wireless accurate detection of hand poses. This provides ideas for hand somatosensory detection technology, leading to health monitoring, intelligent rehabilitation training, and personalized medicine.

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Section: Introductionmentioning

confidence: 99%

“…6 For example, Yang and coworkers reported a flexible sensor for underwater motion monitoring that simultaneously detects strain and temperature. 7 Therefore, the development of high-performance and multifunctional flexible pressure sensors is imminent.…”

Section: Introductionmentioning

confidence: 99%

Wearable Pressure Sensor Array with Layer-by-Layer Assembled MXene Nanosheets/Ag Nanoflowers for Motion Monitoring and Human–Machine Interfaces

Zhang

Bao

et al. 2022

ACS Appl. Mater. Interfaces

138

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“…On one hand, the noticeable progress of flexible electronic manufacturing technology on 3D freedom surfaces − and the great breakthrough of self-powered technology , greatly expand the application scenarios of flexible sensing. On the other hand, this substantial development is mainly reflected on sensitivity in the field of flexible pressure sensors. − The extremely high sensitivity of devices allows detecting weak changes in pressure, leading to many new applications such as human–computer interaction, − health monitoring, − and robotic tactile sensing. , Among them, ionic flexible sensors (IFSs) have produced a qualitative leap in sensitivity. , Similar to conventional parallel plate capacitors, the typical IFS consists of two electrodes with a dielectric layer sandwiched between them to transfer the pressure to a capacitive signal. However, due to the atomic scale distance (∼1 nm) between positive and negative charges at the electrical double layer (EDL) interface, the capacitance of iontronic devices can be significantly increased, reaching about 6 orders of magnitude higher than that of parallel plate capacitors …”

Section: Introductionmentioning

confidence: 99%

“…On the other hand, this substantial development is mainly reflected on sensitivity in the field of flexible pressure sensors. 6 − 8 The extremely high sensitivity of devices allows detecting weak changes in pressure, leading to many new applications such as human–computer interaction, 9 − 11 health monitoring, 12 − 14 and robotic tactile sensing. 15 , 16 Among them, ionic flexible sensors (IFSs) have produced a qualitative leap in sensitivity.…”

Section: Introductionmentioning

confidence: 99%

Wide-Range Linear Iontronic Pressure Sensor with Two-Scale Random Microstructured Film for Underwater Detection

Yang

et al. 2022

ACS Omega

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A broad linear range of ionic flexible sensors (IFSs) with high sensitivity is vital to guarantee accurate pressure acquisition and simplify back-end circuits. However, the issue that sensitivity gradually decreases as the applied pressure increases hinders the linearity over the whole working range and limits its wide-ranging application. Herein, we design a two-scale random microstructure ionic gel film with rich porosity and a rough surface. It increases the buffer space during compression, enabling the stress deformation to be more uniform, which makes sure that the sensitivity maintains steady as the pressure loading. In addition, we develop electrodes with multilayer graphene produced by a roll-to-roll process, utilizing its large interlayer spacing and ionaccessible surface area. It benefits the migration and diffusion of ions inside the electrolyte, which increases the unit area capacitance and sensitivity, respectively. The IFS shows ultra-high linearity and a linear range (correlation coefficient ∼ 0.9931) over 0−1 MPa, an excellent sensitivity (∼12.8 kPa −1 ), a fast response and relaxation time (∼20 and ∼30 ms, respectively), a low detection limit (∼2.5 Pa), and outstanding mechanical stability. This work offers an available path to achieve wide-range linear response, which has potential applications for attaching to soft robots, followed with sensing slight disturbances induced by ships or submersibles.

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“…This result shows that our SF-C-PDMS can accurately recognize the tension and compression without internal interference . This response suggested feasibility of obtaining high-quality human pulse signals by converting pulse pressure into tensile stress of SF-C-PDMS through sensor device design. , On the basis of our observations, SF-C-PDMS with higher dimethyl silicone oil ratio seems more suitable for human motion sensing. Figure S17 shows a comparison of finger bending sensing between SF-C-PDMS (25% silicone oil ratio) and SF-C-PDMS (50% silicone oil ratio).…”

mentioning

confidence: 99%

Extremely Soft, Stretchable, and Self-Adhesive Silicone Conductive Elastomer Composites Enabled by a Molecular Lubricating Effect

et al. 2022

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Softness, adhesion, stretchability, and fast recovery from large deformations are essential properties for conductive elastomers that play an important role in the development of high-performance soft electronics. However, it remains an ongoing challenge to obtain conductive elastomers that combine these properties. We have fabricated a super soft (Young’s modulus 2.3–12 kPa), highly stretchable (up to 1500% strain), and underwater adhesive silicone conductive elastomer composite (SF-C-PDMS) by incorporating dimethyl silicone oil as a lubricating agent in a cross-linked molecular network. The resultant SF-C-PDMS not only exhibits superior softness but also can readily recover after a strain of 1000%. The initial resistance only decreases by 8% after 100000 cycles of tensile fatigue test (100% strain, 0.5 Hz, 15 mm/s). This multifunctional silicone conductive elastomer composite is obtained in a one-step preparation at room temperature using commercially available materials. Moreover, we illustrate the capabilities of this composite in motion sensing.

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Porous graphene foam composite-based dual-mode sensors for underwater temperature and subtle motion detection

Cited by 106 publications

References 60 publications

Wearable Pressure Sensor Array with Layer-by-Layer Assembled MXene Nanosheets/Ag Nanoflowers for Motion Monitoring and Human–Machine Interfaces

Wearable Pressure Sensor Array with Layer-by-Layer Assembled MXene Nanosheets/Ag Nanoflowers for Motion Monitoring and Human–Machine Interfaces

Wide-Range Linear Iontronic Pressure Sensor with Two-Scale Random Microstructured Film for Underwater Detection

Extremely Soft, Stretchable, and Self-Adhesive Silicone Conductive Elastomer Composites Enabled by a Molecular Lubricating Effect

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