Flexible and transparent strain sensors based on super-aligned carbon nanotube films

Yu, Yang; Luo, Yufeng; Guo, Alexander; Yan, Lingjia; Wu, Yang; Jiang, Kaili; Li, Qunqing; Fan, Shanhui; Wang, Jiaping

doi:10.1039/c6nr09961k

Cited by 119 publications

(60 citation statements)

References 49 publications

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“…Thus, the fabricated sensor possesses high sensitivity (GF ~2.6), not only at 100% strain but also at lower strains ( Fig. 3d inset), compared to the earlier reported values 7,44,45 . The sensitivity of the sensor at every strain is similar (inset, Fig.…”

Section: Concerted Interaction Between Swcnts and Pdms Under Strainsupporting

confidence: 46%

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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Section: Concerted Interaction Between Swcnts and Pdms Under Strainsupporting

confidence: 46%

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

et al. 2019

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“…To fabricate thin skin‐like electronic materials, another commonly used method is to deposit or transfer conducting materials onto an elastic polymer substrate . Conductive nanoparticles can be coated/deposited through solution coating including drop casting, spin coating, doctor blading, dip coating, and spray coating .…”

Section: Materials Designsmentioning

confidence: 99%

“…However, such sensors showed very limited stretchability (workable strain < 8%) due to the low stretchability of graphene thin film. Surprisingly, sensors fabricated by directly coating super‐aligned CNT (SACNT) films on PDMS substrates showed a high sensing strain range up to 400% ( Figure ) . SACNT thin film was drawn from CNT arrays on a Si wafer, which was then stacked onto a PDMS substrate.…”

Section: Materials Designsmentioning

confidence: 99%

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Strategies for Designing Stretchable Strain Sensors and Conductors

Peng

et al. 2020

Adv Materials Technologies

117

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Flexible and stretchable electronics are attracting tremendous attention for their enormous future potential in wearable technologies. Flexible and stretchable sensors and conductors are the key components of wearable devices for potential applications such as human motion detection, human health monitoring, and human–machine interfaces. One critical requirement for them is to show high level of wearability (bendability and stretchability) and meanwhile to retain their functionality and reliability under large mechanical deformation. To this end, a wide range of materials and structural designs are developed to construct these sensors and conductors. Here, the recent advances in the development of new piezoresistive materials and microstructural motifs that endow electronics with flexibility and stretchability are summarized. Challenges and future opportunities are discussed in terms of the multimodal and multidirectional sensing capabilities, the trade‐off between sensitivity/conductivity and stretchability, multifunctionality, linearity (multiple linear region phenomenon), and integration with flexible power and communication devices.

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“…A successful demonstration of carbon nanotube-activated thin film transparent conductor as a strain sensor application showed high sensing range of up to 400% and fast response of less than 98 ms with a transmittance of 80% at 550 nm [4]. The performance of carbon nanotubeactivated thin film is also comparable to graphene-activated thin film.…”

Section: Introductionmentioning

confidence: 96%

Carbon Nanotube-Activated Thin Film Transparent Conductor Applications

Yahya¹,

Mustaza²,

Abdullah³

2019

Transparent Conducting Films

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Carbon nanotubes are an exciting nanomaterial system that exhibit exceptional mechanical and electrical properties. Due to its small diameter of 1 nm and high aspect ratio in order of 10 3 , they can readily form interconnected conducting network of continuous film with high transparency. Transparent conductor based on carbon nanotube can be grown directly into a thin-film structure, or can be processed after the growth process. Postgrowth arrangement of carbon nanotube into transparent conducting thin films can be achieved by several methods. Most of the methods involve solution-processed approach, while dry-processed approach is also possible. This chapter presents a comprehensive review and methods for fabricating transparent carbon nanotube-activated thin film, which generally demonstrate high conductivity and mechanical flexibility. Comparison on the optical and electrical performance of the carbon nanotube-activated transparent conductors fabricated via different methods is presented in the chapter.

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Flexible and transparent strain sensors based on super-aligned carbon nanotube films

Cited by 119 publications

References 49 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

Strategies for Designing Stretchable Strain Sensors and Conductors

Carbon Nanotube-Activated Thin Film Transparent Conductor Applications

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