Magnetic‐Sensitive Crack Sensor with Ultrahigh Sensitivity at Room Temperature by Depositing Graphene Nanosheets upon a Flexible Magnetic Film

Huang, Jianyu; Ma, Zheng; Wu, Zhenhua; Peng, Linghui; Su, Bin

doi:10.1002/aelm.202100335

Cited by 10 publications

(7 citation statements)

References 46 publications

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“…A type of magnetic‐sensitive crack sensor was developed by the deposition of graphene nanoflakes onto a flexible magnetic substrate 11 . The magnetic‐sensitive substrate bend in the magnetic field, inciting the formation and expansion of cracks in the conductive layer.…”

Section: Other Crack‐based Functional Flexible Sensorsmentioning

confidence: 99%

Section: Generation Mechanisms Of Crack Patterns and Their Influence ...mentioning

confidence: 99%

“…A type of magnetic-sensitive crack sensor was developed by the deposition of graphene nanoflakes onto a flexible magnetic substrate. 11 The magnetic-sensitive substrate bend in the magnetic field, inciting the formation and expansion of cracks in the conductive layer. Plenty of electron transport accesses were destroyed, manifested as a significantly increased resistance and an ultrahigh sensitivity (with 4 × 10 10 change of relative resistance) in the medium magnetic field (0-43 mT).…”

Section: Magnetic Field Sensorsmentioning

confidence: 99%

“…introduced channel cracks into pressure sensors through the pre‐compression of foam piezoresistive unit, achieving ultralow minimum pressure detection limit. Moreover, some recent studies have extended the application of highly sensitive cracks in detecting chemicals, 20c humidity, 20d magnetic field, 11 and temperature 20e . In summary, the introduction of cracks into the sensor field promoted sensor performance and opened a new avenue for applications in motion detection, pulse monitoring, human–machine interface, medical rehabilitation, robot tactile perception, and environmental perception, as shown in Figure 1.…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Crack engineering boosts the performance of flexible sensors

Zhou

Lian

Yin

et al. 2022

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With exceptional performance, flexible sensors have found broad applications, including human health monitoring, motion detection, human-machine interaction, smart wearable technology, and robot control. Crack-sensitive structures based on animal bionics have also caught increasing attention because of their extraordinary sensitivity. Crack-based flexible sensors, which combine the flexibility of the flexible sensors and the high sensitivity of the crack sensing structures, have seen rapid development in recent years. In this review, we summarize the sensing mechanisms of the flexible sensors based on the crack disconnection-reconnection process. The effects of crack type, depth, and density on sensor performance are explored in detail. We also discuss the performance characteristics and applications of the crack-based flexible sensors with various materials, design structures, and crack generation procedures. Finally, the main challenges of the crack-based flexible sensors are also reviewed, and several research directions are proposed.

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Section: Other Crack‐based Functional Flexible Sensorsmentioning

confidence: 99%

Section: Generation Mechanisms Of Crack Patterns and Their Influence ...mentioning

confidence: 99%

Section: Magnetic Field Sensorsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Crack engineering boosts the performance of flexible sensors

Zhou

Lian

Yin

et al. 2022

VIEW

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Interfacial Electrostatic Self‐Assembly of Amyloid Fibrils into Multifunctional Protein Films

et al. 2023

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Amyloid fibrils have generated steadily increasing traction in the development of natural and artificial materials. However, it remains a challenge to construct bulk amyloid films directly from amyloid fibrils due to their intrinsic brittleness. Here, a facile and general methodology to fabricate macroscopic and tunable amyloid films via fast electrostatic self‐assembly of amyloid fibrils at the air–water interface is introduced. Benefiting from the excellent templating properties of amyloid fibrils for nanoparticles (such as conductive carbon nanotubes or magnetic Fe3O4 nanoparticles), multifunctional amyloid films with tunable properties are constructed. As proof‐of‐concept demonstrations, a magnetically oriented soft robotic swimmer with well‐confined movement trajectory is prepared. In addition, a smart magnetic sensor with high sensitivity to external magnetic fields is fabricated via the combination of the conductive and magnetic amyloid films. This strategy provides a convenient, efficient, and controllable approach for the preparation of amyloid‐based multifunctional films and related smart devices.

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Wearable Magnetic Field Sensor with Low Detection Limit and Wide Operation Range for Electronic Skin Applications

Li,

Wu,

Asghar

et al. 2023

Advanced Science

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Flexible electronic devices extended abilities of humans to perceive their environment conveniently and comfortably. Among them, flexible magnetic field sensors are crucial to detect changes in the external magnetic field. State‐of‐the‐art flexible magnetoelectronics do not exhibit low detection limit and large working range simultaneously, which limits their application potential. Herein, a flexible magnetic field sensor possessing a low detection limit of 22 nT and wide sensing range from 22 nT up to 400 mT is reported. With the detection range of seven orders of magnitude in magnetic field sensor constitutes at least one order of magnitude improvement over current flexible magnetic field sensor technologies. The sensor is designed as a cantilever beam structure accommodating a flexible permanent magnetic composite and an amorphous magnetic wire enabling sensitivity to low magnetic fields. To detect high fields, the anisotropy of the giant magnetoimpedance effect of amorphous magnetic wires to the magnetic field direction is explored. Benefiting from mechanical flexibility of sensor and its broad detection range, its application potential for smart wearables targeting geomagnetic navigation, touchless interactivity, rehabilitation appliances, and safety interfaces providing warnings of exposure to high magnetic fields are explored.

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Magnetic‐Sensitive Crack Sensor with Ultrahigh Sensitivity at Room Temperature by Depositing Graphene Nanosheets upon a Flexible Magnetic Film

Cited by 10 publications

References 46 publications

Crack engineering boosts the performance of flexible sensors

Crack engineering boosts the performance of flexible sensors

Interfacial Electrostatic Self‐Assembly of Amyloid Fibrils into Multifunctional Protein Films

Wearable Magnetic Field Sensor with Low Detection Limit and Wide Operation Range for Electronic Skin Applications

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