Hierarchical elastomer tuned self-powered pressure sensor for wearable multifunctional cardiovascular electronics

Chen, Shuwen; Wu, Nan; Lin, Shizhe; Duan, Jiangjiang; Xu, Zisheng; Pan, Yuan; Zhang, Hongbo; Xu, Zheheng; Huang, Liang; Hu, Bin; Zhou, Jun

doi:10.1016/j.nanoen.2020.104460

Cited by 119 publications

(88 citation statements)

References 48 publications

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“…have been developed to improve the output voltage, the triboelectric tactile sensor that can exhibit an ultrawide linearity range is rarely reported. [ 26–33 ] It is still challenging to synergistically enhance the sensitivity and linearity of both capacitive and triboelectric tactile sensors with clear mechanism.…”

Section: Introductionmentioning

confidence: 99%

Bio‐Inspired Hybrid Dielectric for Capacitive and Triboelectric Tactile Sensors with High Sensitivity and Ultrawide Linearity Range

Zhou

et al. 2021

Advanced Materials

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121

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The trade‐off between sensitivity and linearity is critical for preserving the high pressure‐resolution over a broad range and simplifying the signal processing/conversion of flexible tactile sensors. Conventional dielectrics suffer from the difficulty of quantitatively controlling the interacted mechanical and dielectric properties, thus causing the restricted sensitivity and linearity of capacitive sensors. Herein, inspired by human skin, a novel hybrid dielectric composed of a low‐permittivity (low‐k) micro‐cilia array, a high‐permittivity (high‐k) rough surface, and micro‐dome array is developed. The pressure‐induced series‐parallel conversion between the low‐k and high‐k components of the hybrid dielectric enables the linear effective dielectric constant and controllable initial/resultant capacitance. The gradient compressibility of the hybrid dielectric enables the linear behavior of elastic modulus with pressures, which derives the capacitance variation determined by the effective dielectric constant. Therefore, an ultrawide linearity range up to 1000 kPa and a high sensitivity of 0.314 kPa–1 are simultaneously achieved by the optimized hybrid dielectric. The design is also applicable for triboelectric tactile sensors, which realizes the similar linear behavior of output voltage and enhanced sensitivity. With the high pressure‐resolution across a broad range, potential applications such as healthcare monitoring in diverse scenarios and control command conversion via a single sensor are demonstrated.

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Section: Introductionmentioning

confidence: 99%

Bio‐Inspired Hybrid Dielectric for Capacitive and Triboelectric Tactile Sensors with High Sensitivity and Ultrawide Linearity Range

Zhou

et al. 2021

Advanced Materials

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121

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“…Other strategies include the reduction of active materials concentration in nanocomposite matrix through alignment [260], the utilization of novel additives manufacturing techniques such as LIG [271], or the imprinting technique to control the patterns and orientation of functional materials by template restriction [290]. The design and fabrication of wearable sensors with autonomous capabilities include wireless transmission [615,616] self-powered [220,617], self-healed [485] and self-degraded [519] will certainly enable continuous diagnosis of cardiovascular disease. However, these features and similar ones are no longer considered desirable, but they are becoming as crucial as other performance measures since they will allow automatic reparation of device malfunctions and disposal.…”

Section: Discussionmentioning

confidence: 99%

“…Finally, there is an essential need for a multidisciplinary approach encompasses of different knowledge areas, mainly, data, material, medical, and engineering sciences to ensure seamless integration between various sensor components and architecture, and address other challenges associated with sensor overall performance, as well as, evaluate the impact of each on device reliability and efficiency. fabrication of wearable sensors with autonomous capabilities include wireless transmission [615,616] self-powered [220,617], self-healed [485] and self-degraded [519] will certainly enable continuous diagnosis of cardiovascular disease. However, these features and similar ones are no longer considered desirable, but they are becoming as crucial as other performance measures since they will allow automatic reparation of device malfunctions and disposal.…”

Section: Discussionmentioning

confidence: 99%

Blood Pressure Sensors: Materials, Fabrication Methods, Performance Evaluations and Future Perspectives

Al-Qatatsheh

Morsi

Zavabeti

et al. 2020

Sensors

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Advancements in materials science and fabrication techniques have contributed to the significant growing attention to a wide variety of sensors for digital healthcare. While the progress in this area is tremendously impressive, few wearable sensors with the capability of real-time blood pressure monitoring are approved for clinical use. One of the key obstacles in the further development of wearable sensors for medical applications is the lack of comprehensive technical evaluation of sensor materials against the expected clinical performance. Here, we present an extensive review and critical analysis of various materials applied in the design and fabrication of wearable sensors. In our unique transdisciplinary approach, we studied the fundamentals of blood pressure and examined its measuring modalities while focusing on their clinical use and sensing principles to identify material functionalities. Then, we carefully reviewed various categories of functional materials utilized in sensor building blocks allowing for comparative analysis of the performance of a wide range of materials throughout the sensor operational-life cycle. Not only this provides essential data to enhance the materials’ properties and optimize their performance, but also, it highlights new perspectives and provides suggestions to develop the next generation pressure sensors for clinical use.

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“…[1][2][3][4][5] An HMI is a bidirectional communication interface that is divided into human-to-machine (H2M) systems and machine-to-human (M2H) systems. H2M devices include sensors for measuring command signals such as touch, [6][7][8] voice, [9,10] and gesture, [11][12][13][14] which allow for better system control, and measurement systems for measuring electrophysiological signals such as electromyography (EMG), electrocardiography (ECG), and electrooculography (EOG). [15][16][17][18][19] M2H devices provide electrical, thermal, visual, or mechanical feedbacks that simulate various sensations.…”

Section: Introductionmentioning

confidence: 99%

Smart Stretchable Electronics for Advanced Human–Machine Interface

Kim

Suh

2020

Advanced Intelligent Systems

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Hierarchical elastomer tuned self-powered pressure sensor for wearable multifunctional cardiovascular electronics

Cited by 119 publications

References 48 publications

Bio‐Inspired Hybrid Dielectric for Capacitive and Triboelectric Tactile Sensors with High Sensitivity and Ultrawide Linearity Range

Bio‐Inspired Hybrid Dielectric for Capacitive and Triboelectric Tactile Sensors with High Sensitivity and Ultrawide Linearity Range

Blood Pressure Sensors: Materials, Fabrication Methods, Performance Evaluations and Future Perspectives

Smart Stretchable Electronics for Advanced Human–Machine Interface

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