A Highly Sensitive and Stretchable Yarn Strain Sensor for Human Motion Tracking Utilizing a Wrinkle-Assisted Crack Structure

Sun, Hongling; Dai, Kun; Zhai, Wei; Zhou, Yujie; Li, Jianwei; Zheng, Guoqiang; Li, Bo; Liu, Chuntai; Shen, Changyu

doi:10.1021/acsami.9b09229

Cited by 170 publications

(123 citation statements)

References 68 publications

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“…In addition to pressure and position detection, strain measurements are equally important in flexible electronics. Wrinkle assisted crack structures can be used to design strain sensors 29 . While subjected to bending stresses, the resulting sensors showed high sensitivity, high stretching range, low limit of detection, high durability, wider strain range.…”

Section: Introductionmentioning

confidence: 99%

Computational study of the water-driven graphene wrinkle life-cycle towards applications in flexible electronics

Kashyap

Yang

Datta

2020

Sci Rep

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The ubiquitous presence of wrinkles in two-dimensional materials alters their properties significantly. It is observed that during the growth process of graphene, water molecules, sourced from ambient humidity or transferred method used, can get diffused in between graphene and the substrate. The water diffusion causes/assists wrinkle formation in graphene, which influences its properties. The diffused water eventually dries, altering the geometrical parameters and properties of wrinkled graphene nanoribbons. Our study reveals that the initially distributed wrinkles tend to coalesce to form a localized wrinkle whose configuration depends on the initial wrinkle geometry and the quantity of the diffused water. The movement of the localized wrinkle is categorized into three modes—bending, buckling, and sliding. The sliding mode is characterized in terms of velocity as a function of diffused water quantity. Direct bandgap increases linearly with the initial angle except the highest angle considered (21°), which can be attributed to the electron tunneling effect observed in the orbital analysis. The system becomes stable with an increase in the initial angle of wrinkle as observed from the potential energy plots extracted from MD trajectories and confirmed with the DOS plot. The maximum stress generated is less than the plastic limit of the graphene.

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Section: Introductionmentioning

confidence: 99%

Computational study of the water-driven graphene wrinkle life-cycle towards applications in flexible electronics

Kashyap

Yang

Datta

2020

Sci Rep

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“…At present, to satisfy the aforementioned characteristics, researchers have designed strain sensors with different sensing mechanisms, among which the resistance sensor has gradually become the mainstream design method of strain sensors due to its simplicity and low cost. According to the response principle of resistance sensors, conductive carbon fillers and mental nanowires (such as carbon black [16,17], carbon nanotubes [18,19], graphene [20,21], and Ag nanowires [22,23]) can be combined with flexible substrates (such as polydimethylsiloxane (PDMS) [24,25], polyurethane (PU) [26,27], silicone rubber (SR) [28,29], elastic fabrics [30,31], and elastic bands [32]) to make a flexible piezoresistive sensor with a high sensitivity and a large stretch range by a certain preparation method. Therefore, these studies reveal that composites made of a conductive material and polymer can meet the performance requirement of strain sensors.…”

Section: Introductionmentioning

confidence: 99%

A Flexible Strain Sensor Based on the Porous Structure of a Carbon Black/Carbon Nanotube Conducting Network for Human Motion Detection

Zhang

Chen

et al. 2020

Sensors

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High-performance flexible strain sensors are playing an increasingly important role in wearable electronics, such as human motion detection and health monitoring, with broad application prospects. This study developed a flexible resistance strain sensor with a porous structure composed of carbon black and multi-walled carbon nanotubes. A simple and low-cost spraying method for the surface of a porous polydimethylsiloxane substrate was used to form a layer of synergized conductive networks built by carbon black and multi-walled carbon nanotubes. By combining the advantages of the synergetic effects of mixed carbon black and carbon nanotubes and their porous polydimethylsiloxane structure, the performance of the sensor was improved. The results show that the sensor has a high sensitivity (GF) (up to 61.82), a wide strain range (0%–130%), a good linearity, and a high stability. Based on the excellent performance of the sensor, the flexible strain designed sensor was installed successfully on different joints of the human body, allowing for the monitoring of human movement and human respiratory changes. These results indicate that the sensor has promising potential for applications in human motion monitoring and physiological activity monitoring.

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“…Sun et al also uses the conductive cracking technique for strain sensing for subtle and larger human movements. Here, the authors present a new wearable strain sensor using polyurethane yarn coated in carbon nanotube ink.…”

Section: Sensors For Biophysical Monitoringmentioning

confidence: 99%

Interfacial Phenomena of Advanced Composite Materials toward Wearable Platforms for Biological and Environmental Monitoring Sensors, Armor, and Soft Robotics

Horne

McLoughlin

Bury

et al. 2020

Adv Materials Inter

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With haptic and pressure sensor manufacturing in the US totaling $US 1.6 billion in annual revenue—with 2% annual projected growth from 2018 to 2023—and tactical and service clothing manufacturing in the US totaling $US 242.9 million in annual revenue, the potential of advanced wearables continues to grow. As many fields tend toward miniaturized technologies in the modern age, many recent developments have been made for wearable platforms. Within the broad area of wearable platforms, there are many specific applications to consider, such as motion sensing, biomarker detection, monitoring of environmental pollutants, haptic sensors, enhanced soft robotics, and improving the safeguarding capabilities of armor. For these applications, the interfacial phenomena occurring between the continuous and discrete phases within the composite material are responsible for the device's response and bulk properties. Understanding these phenomena at the composite interfaces of the system allows for finer tuning of morphological, electromechanical, and other bulk properties, as well as the optimization of the wearable's output—in terms of the applications targeted. Control over these advanced composite materials is paramount in personalized health‐care systems, advanced defense technologies, commercial wearables. Recent advances on composite interfaces for wearable platforms are discussed, along with trends and an outlook of the field.

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A Highly Sensitive and Stretchable Yarn Strain Sensor for Human Motion Tracking Utilizing a Wrinkle-Assisted Crack Structure

Cited by 170 publications

References 68 publications

Computational study of the water-driven graphene wrinkle life-cycle towards applications in flexible electronics

Computational study of the water-driven graphene wrinkle life-cycle towards applications in flexible electronics

A Flexible Strain Sensor Based on the Porous Structure of a Carbon Black/Carbon Nanotube Conducting Network for Human Motion Detection

Interfacial Phenomena of Advanced Composite Materials toward Wearable Platforms for Biological and Environmental Monitoring Sensors, Armor, and Soft Robotics

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