Wrinkled and cracked amorphous carbon film for high-performance flexible strain sensors

Zhou, Jingyuan; Guo, Peng; Li, Cui; Yan, Chunliang; Xu, Dianguo; Li, Fali; Zhang, Cheng; Wang, Aiying

doi:10.1016/j.diamond.2022.109619

Cited by 14 publications

(3 citation statements)

References 43 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…We compared the main sensing performances of our sensor to those of other piezoresistive flexible strain sensors, as shown in Figure f. The CBH-sensor exhibits high performances between balancing sensitivity and wide sensing range, outperforming the serpentine or wrinkles/cracks piezoresistive strain sensors ,− reported in the literature to the best of our knowledge (Table S2, Supporting Information). Although the sensitivity or sensing range is lower than that of some strain sensors based on new material or architecture designs, they still cannot handle well to achieve a trade-off between sensitivity and the sensing range.…”

Section: Resultsmentioning

confidence: 99%

Combinatorial Bionic Hierarchical Flexible Strain Sensor for Sign Language Recognition with Machine Learning

Zong,

Zhang,

Wang

et al. 2024

ACS Appl. Mater. Interfaces

View full text Add to dashboard Cite

Flexible strain sensors have been widely researched in fields such as smart wearables, human health monitoring, and biomedical applications. However, achieving a wide sensing range and high sensitivity of flexible strain sensors simultaneously remains a challenge, limiting their further applications. To address these issues, a cross-scale combinatorial bionic hierarchical design featuring microscale morphology combined with a macroscale base to balance the sensing range and sensitivity is presented. Inspired by the combination of serpentine and butterfly wing structures, this study employs threedimensional printing, prestretching, and mold transfer processes to construct a combinatorial bionic hierarchical flexible strain sensor (CBH-sensor) with serpentine-shaped inverted-V-groove/wrinkling− cracking structures. The CBH-sensor has a high wide sensing range of 150% and high sensitivity with a gauge factor of up to 2416.67. In addition, it demonstrates the application of the CBH-sensor array in sign language gesture recognition, successfully identifying nine different sign language gestures with an impressive accuracy of 100% with the assistance of machine learning. The CBH-sensor exhibits considerable promise for use in enabling unobstructed communication between individuals who use sign language and those who do not. Furthermore, it has wide-ranging possibilities for use in the field of gesture-driven interactions in human−computer interfaces.

show abstract

Section: Resultsmentioning

confidence: 99%

Combinatorial Bionic Hierarchical Flexible Strain Sensor for Sign Language Recognition with Machine Learning

Zong,

Zhang,

Wang

et al. 2024

ACS Appl. Mater. Interfaces

View full text Add to dashboard Cite

show abstract

“…Recently, many research groups have utilized electrospun CNF films for the fabrication of flexible strain sensors, 33 achieving promising results. [32][33][34] However, the conductive capability of electrospun CNF films is limited, leading to lower sensitivity when used as force-sensitive materials. Therefore, surface modification of electrospun CNFs to improve their conductivity and enhance response sensitivity is of significant research importance.…”

Section: Introductionmentioning

confidence: 99%

“…Notably, using polyacrylonitrile (PAN) as a precursor and employing electrospinning technology, along with subsequent pre‐oxidation and carbonization processes, can convert PAN nanofibers into carbon nanofibers, which is a simple and efficient method for CNF preparation. Recently, many research groups have utilized electrospun CNF films for the fabrication of flexible strain sensors, 33 achieving promising results 32–34 . However, the conductive capability of electrospun CNF films is limited, leading to lower sensitivity when used as force‐sensitive materials.…”

Section: Introductionmentioning

confidence: 99%

Resistance‐type strain sensor based on carbon nanofiber/polypyrrole composite membrane with high sensitivity

Zhang,

Li,

Zhang

et al. 2024

Polymer Composites

View full text Add to dashboard Cite

Carbon nanofibers have been widely studied as one of the promising materials for fabricating flexible electronic strain sensors. Surface modification of carbon nanofibers by conducting polymers is a simple yet effective approach to constructing strain sensors with good conductivity and sensitivity. In this work, composite nanofiber membranes composed of carbon nanofiber and conducting polymer are developed via in situ polymerization of pyrrole, aniline, and thiophene respectively on the surface of the carbon nanofiber which serves as a substrate. Different composite membranes, CNF@PANI, CNF/Ppy, and CNF@PTh, are successfully manufactured. The conducting polymer‐carbon nanofiber composite membranes exhibit improved conductivity as well as response sensitivity compared to pristine carbon nanofiber membranes. Among different composite membranes being studied, CNF/Ppy demonstrates the highest strain‐sensing performance. It shows good sensitivity, reproducibility, and stability in detecting both subtle (strain = 0.1%) and large (strain = 25%) deformation. The excellent strain‐sensing performance of CNF/Ppy endows the composite membrane with great potential for applications in wearable electronics.Highlights Adding PANI, Ppy, and PTh could improve the conductivity of the CNF sensor. Ppy doping has a good effect on the performance of the CNF strain sensor. CNF/Ppy strain sensor has high sensitivity, stability, and durability. CNF/Ppy sensors can detect deformation caused by human movement. CP‐CNF composite material has good flexibility and mechanical properties.

show abstract

Recent Advances in Flexible Temperature Sensors: Materials, Mechanism, Fabrication, and Applications

Liu,

Dou,

Wang

et al. 2024

Advanced Science

View full text Add to dashboard Cite

Flexible electronics is an emerging and cutting‐edge technology which is considered as the building blocks of the next generation micro‐nano electronics. Flexible electronics integrate both active and passive functions in devices, driving rapid developments in healthcare, the Internet of Things (IoT), and industrial fields. Among them, flexible temperature sensors, which can be directly attached to human skin or curved surfaces of objects for continuous and stable temperature measurement, have attracted much attention for applications in disease prediction, health monitoring, robotic signal sensing, and curved surface temperature measurement. Preparing flexible temperature sensors with high sensitivity, fast response, wide temperature measurement interval, high flexibility, stretchability, low cost, high reliability, and stability has become a research target. This article reviewed the latest development of flexible temperature sensors and mainly discusses the sensitive materials, working mechanism, preparation process, and the applications of flexible temperature sensors. Finally, conclusions based on the latest developments, and the challenges and prospects for research in this field are presented.

show abstract

Wrinkled and cracked amorphous carbon film for high-performance flexible strain sensors

Cited by 14 publications

References 43 publications

Combinatorial Bionic Hierarchical Flexible Strain Sensor for Sign Language Recognition with Machine Learning

Combinatorial Bionic Hierarchical Flexible Strain Sensor for Sign Language Recognition with Machine Learning

Resistance‐type strain sensor based on carbon nanofiber/polypyrrole composite membrane with high sensitivity

Recent Advances in Flexible Temperature Sensors: Materials, Mechanism, Fabrication, and Applications

Contact Info

Product

Resources

About