Simultaneously Detecting Subtle and Intensive Human Motions Based on a Silver Nanoparticles Bridged Graphene Strain Sensor

Yang, Zhen; Wang, Dan-Yang; Pang, Yu; Li, Yuxing; Wang, Qian; Zhang, Tianyu; Wang, Jia-Bin; Liu, Xiao; Yang, Yi-Yan; Jian, Jinming; Jian, Muqiang; Zhang, Yingying; Yang, Yi; Ren, Tian‐Ling

doi:10.1021/acsami.7b16284

Cited by 130 publications

(102 citation statements)

References 29 publications

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“…More precisely, single-walled carbon nanotubes (SWCNTs) possess one dimensional morphology with high aspect ratio to offer high internal piezoresistivity for use in strain sensors 17,18 . The main challenge in its use as sensing element follows from the restrictions associated with the fabrication strategies of the sensor [19][20][21][22][23][24][25] .Fragmented SWCNT paper with cracks has been integrated into PDMS, which endows the device with a large gauge factor of ~10 7 in the sensing region up to 50% 26 . Thickness gradient SWCNT film has been reported and exhibited segmented sensitivity with substantial structural changes under applied strain , thereby persuading non-linear response 27 .…”

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confidence: 99%

A water-resilient carbon nanotube based strain sensor for monitoring structural integrity

et al. 2019

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Monitoring structural integrity during and after extreme events such as an earthquake or a tsunami is a mundane yet important task that still awaits a workable solution. Currently available stress sensors are not sufficiently robust and are affected by humidity. Insufficient information about crack formation preceding structural failure increases risk during rescue operations significantly. Designing durable stress sensors that are not affected by harsh and changing environment and do not fail under catastrophic conditions is a fundamental challenge. To address this problem, we developed a stress sensor based on creased singlewalled carbon nanotubes (SWCNTs) encapsulated in a non-fluorinated superhydrophobic coating. The creased SWCNT film was fabricated and integrated in polydimethylsiloxane (PDMS) to provide a highly linear response under elastic deformation. The non-fluorinated water-repellent coating was fabricated by spray-coating the film with nanosilica particles, providing water resistance during elastic deformation.The compact design and superior water resistance of the sensor, along with its appealing linearity and 1 large stretchability, demonstrates the scalability of this approach for fabricating efficient strain sensors for applications in infrastructure and robotic safety management as well as advanced wearable sensors.Monitoring structural integrity during and after extreme events such as an earthquake or a tsunami is a mundane yet important task that still awaits a workable solution. Additionally, the mechanical frame strength of transportation must be continuously monitored for sufficient safety. Currently available strain sensors are not sufficiently robust and are affected by humidity. A water-proof strain sensor would be applicable for infrastructure safety management in harsh environments. Such a harmless water-proof strain sensor could also be used as an advanced wearable sensor. Insufficient information about crack formation preceding structural failure increases risk during rescue operations significantly. To address this problem, we developed a strain sensor based on creased single-walled carbon nanotubes (SWCNTs) encapsulated in a non-fluorinated superhydrophobic coating. The SWCNT film was fabricated and integrated in polydimethylsiloxane (PDMS) to provide a highly linear response under elastic deformation.The non-fluorinated water-repellent coating was fabricated by spray-coating the film with nanosilica particles, providing water resistance during elastic deformation. The compact design and superior water resistance of the sensor, along with its appealing linearity and large stretchability, demonstrates the scalability of this approach for fabricating efficient strain sensors for applications in infrastructure and robotic safety management.Governments must guarantee safety and present environments to preserve life while maintaining a comfortable urban landscape with minimal economic burden. Particularly, numerous infrastructures, such as buildings, bridges, dams, and tunnels, in adva...

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confidence: 99%

A water-resilient carbon nanotube based strain sensor for monitoring structural integrity

et al. 2019

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“…Apart from active materials, the supporting materials also significantly influence the performance of mechanical sensors. There are several kinds of commonly used supporting materials in flexible mechanical sensors, such as polymers, silicone (eg, polydimethylsiloxane [PDMS], Ecoflex), polyacrylic ester (PEA), and polyethylene naphthalate (PEN)), hydrogels (eg, polyvinyl alcohol (PVA), polyacrylamide), and biomaterials (eg, fibroin). Silicone is one of the most widely used supporting materials due to its good flexibility, high stretchability, and satisfying biocompatibility.…”

Section: Skin‐inspired Mechanical Sensorsmentioning

confidence: 99%

Physical sensors for skin‐inspired electronics

Zhang

Wang

et al. 2019

InfoMat

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Skin, the largest organ in the human body, is sensitive to external stimuli.In recent years, an increasing number of skin-inspired electronics, including wearable electronics, implantable electronics, and electronic skin, have been developed because of their broad applications in healthcare and robotics.Physical sensors are one of the key building blocks of skin-inspired electronics. Typical physical sensors include mechanical sensors, temperature sensors, humidity sensors, electrophysiological sensors, and so on. In this review, we systematically review the latest advances of skin-inspired mechanical sensors, temperature sensors, and humidity sensors. The working mechanisms, key materials, device structures, and performance of various physical sensors are summarized and discussed in detail. Their applications in health monitoring, human disease diagnosis and treatment, and intelligent robots are reviewed. In addition, several novel properties of skin-inspired physical sensors such as versatility, self-healability, and implantability are introduced. Finally, the existing challenges and future perspectives of physical sensors for practical applications are discussed and proposed. K E Y W O R D Selectronics skin, flexible electronics, humidity sensors, mechanical sensors, temperature sensors, wearable sensors

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“…Many efforts have been devoted to address the challenges including the grand one, and the latest developed stretchable strain sensors have overcome one or more challenges, such as having both high sensitivity and stretchability, low hysteresis for the resistive‐type, high cyclic stability, and multidirectional sensing function. [71,83e,89b,90] It is worth examining the following recently developed stretchable polymer/nanomaterial strain sensors with both high sensitivity and stretchability.…”

Section: Development Of Stretchable Strain Sensorsmentioning

confidence: 99%

A Path Beyond Metal and Silicon:Polymer/Nanomaterial Composites for Stretchable Strain Sensors

Qiu

Yang

et al. 2019

Adv Funct Materials

165

135

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Conventional strain sensors based on metals and semiconductors are rigid and cannot measure soft and stretchable objects. Thus, new strain sensors based on polymer/nanomaterial composites are attracting more interest. Although much effort has been dedicated to achieve high values of both sensitivity and stretchability with linearity, this work endeavors to search and establish guidelines for the development of stretchable strain sensors, by critically reviewing conventional sensors and examining recent progress. It starts from introducing key parameters for conventional strain sensors; these parameters are further discussed for their potential impact on new polymer/nanomaterial strain sensors. The work concludes that there are no general benchmarks for conventional strain sensors utilized in industry. From the findings, the authors suggest that stretchable strain sensors should be custom designed and developed to meet particular measurement requirements, in comparison with a generic aim of yielding a sensor with high degrees of stretchability, sensitivity, and linearity. Challenges are discussed, including reliability, calibration to be used as proper gauges, and soft data acquisition systems.

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Simultaneously Detecting Subtle and Intensive Human Motions Based on a Silver Nanoparticles Bridged Graphene Strain Sensor

Cited by 130 publications

References 29 publications

A water-resilient carbon nanotube based strain sensor for monitoring structural integrity

A water-resilient carbon nanotube based strain sensor for monitoring structural integrity

Physical sensors for skin‐inspired electronics

A Path Beyond Metal and Silicon:Polymer/Nanomaterial Composites for Stretchable Strain Sensors

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