Highly Conductive and Sensitive Wearable Strain Sensors with Metal/Nanoparticle Double Layer for Noninterference Voice Detection

Choi, Hyung Jin; Ahn, Junhyuk; Jung, Byung Ku; Choi, Young Kyun; Park, Taesung; Bang, Junsung; Park, Junhyeok; Yang, Yoonji; Son, Gayeon; Oh, Soong Ju

doi:10.1021/acsami.3c08050

Cited by 16 publications

(6 citation statements)

References 40 publications

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“…[142,143] They exhibit an exceptional limit of detection (LOD) by responding instantaneously to subtle changes in external load with significant increases in electrical resistance. This makes them especially suitable for applications like monitoring neck vibrations for voice recognition, [144,145] where high sensitivity at low detection ranges and excellent LOD are essential.…”

Section: Selection Criteria For Soft Multifunctional Sensorsmentioning

confidence: 99%

Age of Flexible Electronics: Emerging Trends in Soft Multifunctional Sensors

Lee,

Cho,

Kim

2024

Advanced Materials

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With the commercialization of first‐generation flexible mobiles and displays in the late 2010s, humanity has stepped into the age of flexible electronics. Inevitably, soft multifunctional sensors, as essential components of next‐generation flexible electronics, have attracted tremendous research interest like never before. This review is dedicated to offering an overview of the latest emerging trends in soft multifunctional sensors and their accordant future research and development (R & D) directions for the coming decade. First, key characteristics and the predominant target stimuli for soft multifunctional sensors are highlighted. Second, important selection criteria for soft multifunctional sensors are introduced. Next, emerging materials/structures and trends for soft multifunctional sensors are identified. Specifically, the future R & D directions of these sensors are envisaged based on their emerging trends, namely (i) decoupling of multiple stimuli, (ii) data processing, (iii) skin conformability, and (iv) energy sources. Finally, the challenges and potential opportunities for these sensors in future are discussed, offering new insights into prospects in the fast‐emerging technology.This article is protected by copyright. All rights reserved

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Section: Selection Criteria For Soft Multifunctional Sensorsmentioning

confidence: 99%

Age of Flexible Electronics: Emerging Trends in Soft Multifunctional Sensors

Lee,

Cho,

Kim

2024

Advanced Materials

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“…Various approaches have been explored, including micromorphology engineering that alters the contact resistance between active layers and electrodes, such as pyramids, , microspheres, , microspines, − and micropatterned and bionic microstructures as well as multilayers, − fiber membranes, , and 3D porous configurations − that modify the conductive paths within the sensing material. To improve the sensing performance, various conductive nano/micro materials are also widely used, for example, carbon nanotubes, , 2D graphene/MXene, , metal nanoparticles, − and conductive polymers . Among them, MXenes are considered as a promising sensing material due to their excellent metal conductivity, large specific surface area, and abundant surface functional groups. , …”

Section: Introductionmentioning

confidence: 99%

Flexible and Simply Degradable MXene–Methylcellulose Piezoresistive Sensor for Human Motion Detection

Du,

Zhang,

Liu

et al. 2024

ACS Appl. Mater. Interfaces

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Flexible pressure sensors are intensively demanded in various fields such as electronic skin, medical and health detection, wearable electronics, etc. MXene is considered an excellent sensing material due to its benign metal conductivity and adjustable interlayer distance. Exhibiting both high sensitivity and long-term stability is currently an urgent pursuit in MXene-based flexible pressure sensors. In this work, high-strength methylcellulose was introduced into the MXene film to increase the interlayer distance of 2D nanosheets and fundamentally overcome the self-stacking problem. Thus, concurrent improvement of the sensing capability and mechanical strength was obtained. By appropriately modulating the ratio of methylcellulose and MXene, the obtained pressure sensor presents a high sensitivity of 19.41 kPa–1 (0.88–24.09 kPa), good stability (10000 cycles), and complete biodegradation in H2O2 solution within 2 days. Besides, the sensor is capable of detecting a wide range of human activities (pulse, gesture, joint movement, etc.) and can precisely recognize spatial pressure distribution, which serves as a good candidate for next-generation wearable electronic devices.

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“…On the other hand, significant attention has been dedicated to wearable electronics, − which play a pivotal role in advancing motion recognition and detection, , human–machine interaction, , and intelligent robotics . Exploring innovative sensitive materials and structural designs represents a time and cost-efficient approach to developing advanced wearable devices with properties of high sensitivity, wide detection range, and enhanced stability and durability. ,− Various sensitive materials have been documented, including zero-dimensional metal nanoparticles, one-dimensional conductive polymer fibers and metal nanowires, , as well as two-dimensional graphene and graphene-like materials. , …”

Section: Introductionmentioning

confidence: 99%

“… 16 Exploring innovative sensitive materials and structural designs represents a time and cost-efficient approach to developing advanced wearable devices with properties of high sensitivity, wide detection range, and enhanced stability and durability. 6 , 17 − 19 Various sensitive materials have been documented, including zero-dimensional metal nanoparticles, 20 one-dimensional conductive polymer fibers and metal nanowires, 21 , 22 as well as two-dimensional graphene and graphene-like materials. 23 , 24 …”

Section: Introductionmentioning

confidence: 99%

Facile Graphene Oxide Modification Method via Hydroxyl-yne Click Reaction for Ultrasensitive and Ultrawide Monitoring Pressure Sensors

Hu,

Lu,

Zheng

et al. 2024

ACS Appl. Mater. Interfaces

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Enhancing the durability and functionality of existing materials through sustainable pathways and appropriate structural design represents a time-and costeffective strategy for the development of advanced wearable devices. Herein, a facile graphene oxide (GO) modification method via the hydroxyl-yne click reaction is present for the first time. By the click coupling between propiolate esters and hydroxyl groups on GO under mild conditions, various functional molecules are successfully grafted onto the GO. The modified GO is characterized by FTIR, XRD, TGA, XPS, and contact angle, proving significantly improved dispersibility in various solvents. Besides the high efficiency, high selectivity, and mild reaction conditions, this method is highly practical and accessible, avoiding the need for prefunctionalizations, metals, or toxic reagents. Subsequently, a rGO-PDMS sponge-based piezoresistive sensor developed by modified GO-P2 as the sensitive material exhibits impressive performance: high sensitivity (335 kPa −1 , 0.8−150 kPa), wide linear range (>500 kPa), low detection limit (0.8 kPa), and long-lasting durability (>5000 cycles). Various practical applications have been demonstrated, including body joint movement recognition and real-time monitoring of subtle movements. These results prove the practicality of the methodology and make the rGO-PDMS sponge-based pressure sensor a real candidate for a wide array of wearable applications.

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Highly Conductive and Sensitive Wearable Strain Sensors with Metal/Nanoparticle Double Layer for Noninterference Voice Detection

Cited by 16 publications

References 40 publications

Age of Flexible Electronics: Emerging Trends in Soft Multifunctional Sensors

Age of Flexible Electronics: Emerging Trends in Soft Multifunctional Sensors

Flexible and Simply Degradable MXene–Methylcellulose Piezoresistive Sensor for Human Motion Detection

Facile Graphene Oxide Modification Method via Hydroxyl-yne Click Reaction for Ultrasensitive and Ultrawide Monitoring Pressure Sensors

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