A cilia-inspired micropatterned sensor with a high-permittivity dielectric hydrogel for ultrasensitive mechanoreception both in air and underwater

Wang, Yuanyuan; Liao, Jiaqi; Liu, Chencong; Sun, Qingfeng; Shamshina, Julia L.; Shen, Xiaoping

doi:10.1039/d3ta05884k

J. Mater. Chem. A

2023

DOI: 10.1039/d3ta05884k

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A cilia-inspired micropatterned sensor with a high-permittivity dielectric hydrogel for ultrasensitive mechanoreception both in air and underwater

Yuanyuan Wang,

Jiaqi Liao,

Chencong Liu

et al.

Abstract: Hydrogel mechanosensors have garnered increasing attention for their diverse applications in human–machine interfaces, healthcare monitoring, and underwater technologies.

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2024

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Cited by 3 publications

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Multiscale Confinement‐Modulated Cellulosic Dielectric Materials for Energy Harvesting and Self‐Powered Devices

Huang,

Nong,

Zhang

et al. 2024

Adv Funct Materials

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The rapid rise of triboelectric nanogenerators, an innovative technology for low‐frequency energy harvesting and self‐powered sensing, has increased the interest in high‐performance triboelectric materials. Enhancing the surface charge density via dielectric modulation is essential for high‐performance triboelectric nanogenerators. As the most abundant biopolymer on earth, cellulose has remarkable properties such as excellent mechanical strength, thermal stability, and tunable surface chemistry, indicating its significant application potential in the design and fabrication of triboelectric nanogenerators. Owing to its unique multiscale structure and excellent processability, cellulose holds substantial promise for dielectric modulation. This review aims to provide comprehensive insights into the rational design and tailored preparation of cellulosic materials with optimal dielectric constants. First, the multiscale structure and exceptional advantages of cellulosic materials are interpreted. A comprehensive investigation into multiscale confinement‐modulated cellulosic dielectric materials encompassing cellulosic molecules, dipoles, and fibers along with their dipoles is undertaken and the significance of interfacial polarization is explored. Furthermore, the emerging applications of cellulosic materials with superior dielectric properties in triboelectric nanogenerators, including energy harvesting, self‐powered sensing, and self‐powered medical and smart monitoring systems, are described. Finally, the challenges and future opportunities for cellulosic dielectric modulation are summarized.

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Multiscale Confinement‐Modulated Cellulosic Dielectric Materials for Energy Harvesting and Self‐Powered Devices

Huang,

Nong,

Zhang

et al. 2024

Adv Funct Materials

View full text Add to dashboard Cite

show abstract

Underwater Vibration Sensor to Enable Automated and Contactless Voice Recognition

Sarkar,

Kara,

Singh

et al. 2024

Adv Funct Materials

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Individuals suffering from voice disabilities have limited access to currently available automation technologies that operate through voice commands. To address this issue, an alternative voice recognition approach is essential without directly monitoring the audio signals generated from the vocal cord. In this work, the design of a chemically reactive and conductive sponge is reported to create an underwater vibration sensor with a fast response time and high sensitivity, through orthogonal modulation of conductivity (40–2150 kΩ), water repellence (0°–154°) and mechanical properties (0.32–2.63 MPa). This class of porous sponge sensors enables the identification of subtle water waves generated at the air–water interface and extends its utility to detecting a variety of locomotion (squatting, jumping, walking, etc.), as well as automated voice recognition using a deep learning model without direct contact with the human body. Overall, this underwater vibration sensor provides a novel basis for remote interaction with automated technologies, which finds use in medical diagnostics, human‐machine interfaces, and underwater communication systems.

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Biomaterials for flexible pressure sensors: innovations and advancements

Wang,

Hou,

Chen

et al. 2024

J. Mater. Chem. C

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A cilia-inspired micropatterned sensor with a high-permittivity dielectric hydrogel for ultrasensitive mechanoreception both in air and underwater

Abstract: Hydrogel mechanosensors have garnered increasing attention for their diverse applications in human–machine interfaces, healthcare monitoring, and underwater technologies.

Cited by 3 publications

References 48 publications

Multiscale Confinement‐Modulated Cellulosic Dielectric Materials for Energy Harvesting and Self‐Powered Devices

Multiscale Confinement‐Modulated Cellulosic Dielectric Materials for Energy Harvesting and Self‐Powered Devices

Underwater Vibration Sensor to Enable Automated and Contactless Voice Recognition

Biomaterials for flexible pressure sensors: innovations and advancements

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