Enhancement of linearity range of stretchable ultrasensitive metal crack strain sensor <i>via</i> superaligned carbon nanotube-based strain engineering

Kim, Kang-Hyun; Hong, Soon Kyu; Ha, Sung‐Hun; Li, Luhe; Lee, Hyung Woo; Kim, Jong-Man

doi:10.1039/d0mh00806k

Cited by 72 publications

(40 citation statements)

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“…Different GF values reflect the different sensitivity of the sensors under applied strains. Among the reported works, both two or more GF values exist in one sensor within the limited strains, [ 65 , 66 , 67 ] but also one GF value with the increased strain in a sensor [ 68 , 69 ]. And these are tightly associated with the materials and mechanisms of the sensors system.…”

Section: Critical Parameters Of Strain Sensorsmentioning

confidence: 99%

Materials, Electrical Performance, Mechanisms, Applications, and Manufacturing Approaches for Flexible Strain Sensors

Han

Chen

et al. 2021

Nanomaterials

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With the recent great progress made in flexible and wearable electronic materials, the upcoming next generation of skin-mountable and implantable smart devices holds extensive potential applications for the lifestyle modifying, including personalized health monitoring, human-machine interfaces, soft robots, and implantable biomedical devices. As a core member within the wearable electronics family, flexible strain sensors play an essential role in the structure design and functional optimization. To further enhance the stretchability, flexibility, sensitivity, and electricity performances of the flexible strain sensors, enormous efforts have been done covering the materials design, manufacturing approaches and various applications. Thus, this review summarizes the latest advances in flexible strain sensors over recent years from the material, application, and manufacturing strategies. Firstly, the critical parameters measuring the performances of flexible strain sensors and materials development contains different flexible substrates, new nano- and hybrid- materials are introduced. Then, the developed working mechanisms, theoretical analysis, and computational simulation are presented. Next, based on different material design, diverse applications including human motion detection and health monitoring, soft robotics and human-machine interface, implantable devices, and biomedical applications are highlighted. Finally, synthesis consideration of the massive production industry of flexible strain sensors in the future; different fabrication approaches that are fully expected are classified and discussed.

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Section: Critical Parameters Of Strain Sensorsmentioning

confidence: 99%

Materials, Electrical Performance, Mechanisms, Applications, and Manufacturing Approaches for Flexible Strain Sensors

Han

Chen

et al. 2021

Nanomaterials

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“…This suggests that the Pt bridges can also play an important role in inducing a gradual reduction in current pathways in the sensor films under strain, thereby preventing an abrupt increase in the electrical resistance of the devices. The sensor response in Figure a proves that the phage coating can contribute to developing high-performance crack-based strain sensors along with the approaches introduced in the recent literature. , …”

Section: Resultsmentioning

confidence: 63%

“…The sensor response in Figure 3a proves that the phage coating can contribute to developing high-performance crack-based strain sensors along with the approaches introduced in the recent literature. 38,39 Figure 3b shows the ΔR/R 0 curves of the PoP strain sensor under successive stretching and releasing at various strains, highlighting the stable and reversible sensor performance obtained with no significant hysteresis. This occurs because the sensor operation is mainly based on the reproducible opening and closing of the cracks in the sensor films in response to applied strain.…”

Section: Resultsmentioning

confidence: 99%

M13 Bacteriophage-Assisted Morphological Engineering of Crack-Based Sensors for Highly Sensitive and Wide Linear Range Strain Sensing

Kim

Nguyen

et al. 2020

ACS Appl. Mater. Interfaces

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Despite their extraordinary mechanosensitivities, most channel-like crackbased strain sensors are limited by their poor levels of stretchability and linearity. This work presents a simple yet efficient way of modulating the cracking structure of thin metal films on elastomers to facilitate the development of high-performance wearable strain sensors. A net-shaped crack structure based on a thin platinum (Pt) film can be produced by coating an elastomer surface with M13 bacteriophages (phages) and consequently engineering the surface strain upon stretching. This process produces a Pt-on-phage (PoP) strain sensor that simultaneously exhibits high levels of stretchability (24%), sensitivity (maximum gauge factor ≈ 845.6 for 20−24%), and linearity (R 2 ≈ 0.988 up to 20%). In addition, the sensor performance can be further modulated by either changing the phage coating volume or adding a silver nanowire coating to the PoP sensor film. The balanced strain-sensing performance, combined with fast response times and high levels of mechanical flexibility and operational stability, enables the devices to detect a wide range of human motions in real time after being attached to various body parts. Furthermore, PoP-based strain sensors can be usefully extended to detect more complex multidimensional strains through further strain engineering on a cross-patterned PoP film.

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“…The electronic skin based on piezoelectronics and synaptic transistor [75] provides promising intelligent prosthetics [76]. The strain engineering of CNTs leads to the health monitoring, i.e., the recognition of human motion [77,78], the collection of arterial pulse waves [79], and electrocardiogram signals [80]. Future attention could be paid onto the implantable and biodegradable devices for medical curing, data processing [81] as well as multiple sensing platform for real-time health monitoring.…”

Section: Healthcare Productsmentioning

confidence: 99%

Applications of Carbon Nanotubes in the Internet of Things Era

et al. 2021

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The post-Moore's era has boosted the progress in carbon nanotube-based transistors. Indeed, the 5G communication and cloud computing stimulate the research in applications of carbon nanotubes in electronic devices. In this perspective, we deliver the readers with the latest trends in carbon nanotube research, including high-frequency transistors, biomedical sensors and actuators, brain–machine interfaces, and flexible logic devices and energy storages. Future opportunities are given for calling on scientists and engineers into the emerging topics.

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Enhancement of linearity range of stretchable ultrasensitive metal crack strain sensor via superaligned carbon nanotube-based strain engineering

Abstract: Conventional mechanical crack-based strain sensors have high mechanosensitivity but suffer from limited stretchability and poor linearity. Here, we present a simple yet highly efficient strategy to enhance the strain-sensing performance...

Cited by 72 publications

References 50 publications

Materials, Electrical Performance, Mechanisms, Applications, and Manufacturing Approaches for Flexible Strain Sensors

Materials, Electrical Performance, Mechanisms, Applications, and Manufacturing Approaches for Flexible Strain Sensors

M13 Bacteriophage-Assisted Morphological Engineering of Crack-Based Sensors for Highly Sensitive and Wide Linear Range Strain Sensing

Applications of Carbon Nanotubes in the Internet of Things Era

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