A unique, flexible, and porous pressure sensor with enhanced sensitivity and durability by synergy of surface microstructure and supercritical fluid foaming

Huang, An; Yang, Zhenyu; Zhu, Yu; Tan, Bin; Ye, Song; Yu, Xiao‐Qi; Liu, Tong; Peng, Xiangfang

doi:10.1016/j.apsusc.2023.156661

Cited by 31 publications

(7 citation statements)

References 57 publications

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“…Specifically, the morphology of the elastic microdome PDMS films can be tailored by adjusting the diameter of the PS micro/nanospheres, the sensitivity of the pressure sensor can be tuned and tailored by adjusting the feature size of the microstructure. In addition, Huang et al 121 proposed pressure tactile sensors by integrating the microsphere surface and internal porous structure into a conductive flexible layer, which is composed of thermoplastic polyurethane/multi-walled carbon nanotube nanocomposite (Fig. 17d).…”

Section: Mtss With Different Micro/nanostructuresmentioning

confidence: 99%

Flexible micro/nanopatterned pressure tactile sensors: technologies, morphology and applications

Wang,

Liu,

et al. 2024

J. Mater. Chem. A

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Section: Mtss With Different Micro/nanostructuresmentioning

confidence: 99%

Flexible micro/nanopatterned pressure tactile sensors: technologies, morphology and applications

Wang,

Liu,

et al. 2024

J. Mater. Chem. A

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“…Constructing well-ordered array microstructures has become an effective approach to improve sensors. ,− As a result, some researchers have designed special contact interface shapes, such as pyramids, , randomly distributed apexes, layered porous structures, microcones, porous pyramids, cylinders, and sawtooth-like wrinkles. However, the methods for constructing these microstructures may not be suitable for creating porous surfaces on the carbonized foam.…”

Section: Introductionmentioning

confidence: 99%

Elastic Multifunctional Pressure Sensor Based on C–NiCoZn–O/CMF Composites for Polar Exploration

Gu,

Jiang,

Yang

et al. 2024

ACS Appl. Nano Mater.

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Flexible and wearable pressure sensors have attracted significant attention due to their wide range of potential applications. However, they often suffer from low sensitivity, narrow pressure detection range, and poor mechanical flexibility. In this work, a multifunctional 3D pressure sensor based on a ternary metal oxide@carbon-based sponge (C−NiCoZn−O/ CMF) was developed by the hydrothermal method. The pressure feedback layer of the sensor was uniformly coated with C− NiCoZn−O on the surface of the framework, which improved the device's conductivity, sensitivity, and stability significantly. The sensitivities of 41.99, 23.39, and 11.19 kPa −1 are in the ranges 0− 4.01, 4.01−8.39, and 8.39−20.1 kPa, respectively, and the cyclic retention rate exceeded 90% after 2000 cycles. The C−NiCoZn− O/CMF composite demonstrated excellent electrochemical performance as an electrode for supercapacitors, with a high specific capacity of 2030 mF/cm 2 at a current density of 1 mA/cm 2 and a high capacity retention rate of 81.55% after 4000 cycles. As a multifunctional device, when integrated with a microprocessor, it can easily detect and process a large amount of human physiological signal data in daily work scenarios. Present composites maintain adjustable conductivity and extremely high elasticity even under extreme conditions such as liquid nitrogen and high temperatures up to 85.6 °C. This work is expected to play a great role in polar exploration, volcano survey, deep space exploration, etc.

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“…Flexible pressure sensors have significant potential for application in electronic skin, , health and medical monitoring, − human–computer interaction, − and wearable electronic devices. , Based on the sensing mechanism, these sensors can be classified into four types: capacitive, − piezoelectric, , triboelectric, , and resistive. − Resistive pressure sensors have gained attention due to their simple manufacturing process and easy data acquisition and reading. Sensitivity is a crucial performance parameter of the sensor, as it determines the sensor’s ability to perceive pressure signals.…”

Section: Introductionmentioning

confidence: 99%

High-Sensitivity Carbon Nanofibers/Graphene/Polydimethylsiloxane Flexible Pressure Sensor Based on a Hierarchical Structure with Enhanced Sensing Range

Chang,

Dong,

Zhao

et al. 2024

ACS Appl. Electron. Mater.

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Achieving a high sensitivity of sensors over a wide linear range is crucial for practical applications. Introducing various micronano topologies is the most effective approach to enhance sensor sensitivity. Unfortunately, due to the size effect, the surface structure is prone to deformation and saturation under pressure, limiting sensitivity to a narrow range and hindering broader applications. Additionally, few of the recently developed sensors with wide sensing ranges have been able to achieve the high sensitivity levels provided by micronano topological structures. The achievement of an effective trade-off between high sensitivity and a wide sensing range still presents significant challenges. In this study, a versatile strategy is proposed to design a high-sensitivity flexible pressure sensor with an improved sensing range. A cost-effective and adjustable wire mesh is utilized to introduce microstructures while constructing a hierarchically reinforced structure, effectively combining porous and surface microstructures. Hybrid carbon nanofibers and graphene serve as conductive materials to further enhance the performance. The sensor demonstrates a high sensitivity of −1.12 kPa–1 and extends the sensing range to nearly 3.9 times (0–853 Pa) compared to sensors with only microstructures (0–220 Pa). Moreover, it exhibits a response speed comparable to that of the human body (26 and 33 ms) and a high durability (4000 cycles). The sensor showcases excellent signal response to high-pressure movements (finger bending and wrist bending) and low-pressure breathing movements, holding promising potential for motion monitoring and information encryption applications.

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A unique, flexible, and porous pressure sensor with enhanced sensitivity and durability by synergy of surface microstructure and supercritical fluid foaming

Cited by 31 publications

References 57 publications

Flexible micro/nanopatterned pressure tactile sensors: technologies, morphology and applications

Flexible micro/nanopatterned pressure tactile sensors: technologies, morphology and applications

Elastic Multifunctional Pressure Sensor Based on C–NiCoZn–O/CMF Composites for Polar Exploration

High-Sensitivity Carbon Nanofibers/Graphene/Polydimethylsiloxane Flexible Pressure Sensor Based on a Hierarchical Structure with Enhanced Sensing Range

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