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Conductive Film with Flexible and Stretchable Capability for Sensor Application and Stealth Information Transmission

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Abstract

Flexible and wearable strain sensors for human-computer interaction, health monitoring, and soft robotics have drawn widespread attention to promising applications in the next generation of artificial intelligence devices. However, conventional semiconductor sensors are difficult to meet the requirements of flexibility and stretchability. Here, we reported a kind of novel and simple sensor based on layer-by-layer (LBL) method. Carbon nanotubes (CNTs) layer provides high ductility and stability in the process of tension sensing, while silver layer provides low initial resistance and fast reflecting in the process of tension sensing. LBL method ensures the uniformity of the conductive layer. The sensor has superior sheet resistance of 9.44 Ω/sq., high elongation at break of 104%. For sensing capability, the sensor has wide reflecting range of 60%, high gauge factor (GF) of 1000 up to 60% strain, fast reflecting time of 165 ms. Excellent reliability and stability have also been verified. It is also worth mentioning that the entire process does not require any expensive equipments, complicated processes or harsh experimental conditions. The above features provide an idea for large-scale application of flexible stretchable sensors.

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Acknowledgments

This work was financially supported by the National Natural Science Foundation of China (No. 51403115). The authors would like to thank Mr. Ang Li and Prof. Huige Wei for the guidance of electrical signal tests of this study.

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Authors and Affiliations

  1. College of Chemical Engineering and Materials Science, Tianjin University of Science and Technology, Tianjin, 300457, China

    Yi-Fei Shan, Zhi-Xi Li, Xiao-Xiao Wang, Hao Li & Yong-Yan Cui

  2. Institute of Molecular Aggregation Science, Tianjin University, Tianjin, 300072, China

    Kun Yang

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  1. Yi-Fei Shan
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  2. Kun Yang
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  3. Zhi-Xi Li
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  4. Xiao-Xiao Wang
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  5. Hao Li
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  6. Yong-Yan Cui
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Correspondence to Kun Yang or Yong-Yan Cui.

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Shan, YF., Yang, K., Li, ZX. et al. Conductive Film with Flexible and Stretchable Capability for Sensor Application and Stealth Information Transmission. Chin J Polym Sci 39, 164–173 (2021). https://doi.org/10.1007/s10118-020-2483-x

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  • DOI: https://doi.org/10.1007/s10118-020-2483-x

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