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High performance flexible piezoelectric sensor based on metal–organic framework (UIO-66) and Bi4Ti3O12 composite film for human motion detection

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Abstract

In this study, we introduce the development and application of a flexible piezoelectric sensor. By incorporating Metal–Organic Framework (UIO-66) and Bi4Ti3O12 into P(VDF-HFP), we fabricated a P(VDF-HFP)/MOF/bismuth vacancy Bi4Ti3O12 composite nanofiber film and undertook comprehensive characterization and performance evaluations. The findings reveal that the PFP-U0.01BKW composite nanofiber thin film demonstrates superior piezoelectric properties, d33 characteristics, mechanical attributes, and heightened sensitivity. Specifically, the PFP-U0.01BKW exhibits a permittivity of 4.34 at 1 kHz, with its elongation at break increasing from 115.1 to 198.8%, while the average Young’s modulus drops from 4.4 to 1.3 MPa. The d33 value for pure P(VDF-HFP) stands at 4.6 pC/N, whereas the P(VDF-HFP)/MOF/0.01 bismuth vacancy Bi4Ti3O12 achieves a d33 value of 14.5. Under forces ranging from 0.098 to 0.98 N, the sensitivity of PFP-U0.01BKW reaches 0.42 V/kPa, marking a sevenfold increase compared to pure P(VDF-HFP). The integration of MOF/bismuth vacancy Bi4Ti3O12 significantly enhances the film’s sensitivity. This paper highlights the potential of the flexible piezoelectric sensor equipped with the PFP-U0.01BKW composite film. It is capable of discerning human body movements by analyzing distinct peaks, frequencies, and shapes, making it suitable for applications in pressure monitoring, motion signal detection, health assessments, and more.

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Data sharing is not applicable to this article as no new data were created or analyzed in this study.

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Acknowledgments

I am grateful to my supervisor for their meticulous guidance and navigation throughout my thesis journey. I also thank my classmates and dear friends for their assistance in overcoming research challenges together. This study was supported by the National Natural Science Foundation of China (No. 52073033), the fund of the Beijing Municipal Education Commission, China (No. 22019821001). This paper is a culmination of collective efforts, and I express my deepest gratitude to all.

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The authors have not disclosed any funding.

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Author notes

  1. Jiayu Jiao and Jiyan Zhang have contributed equally to this work.

Authors and Affiliations

  1. Beijing Key Lab of Special Elastomeric Composite Materials, College of New Materials and Chemical Engineering, Beijing Institute of Petrochemical Technology, Beijing, 102617, China

    Jiayu Jiao, Jiyan Zhang, Qianbing Lin, Yibo Wu & Qisong Shi

Contributions

Jiayu Jiao: Conceptualization, Methodology, Validation, Investigation, Data curation, Formal analysis, Writing—original draft, Visualization. Jiyan Zhang: Conceptualization, Methodology, Validation, Investigation, Data curation, Formal analysis. Qianbing Lin: Formal analysis, Data curation. Yibo Wu: Writing—review & editing, Supervision, Funding acquisition. Qisong Shi: Data curation, Writing—review & editing, Supervision, Project administration, Funding acquisition.

Corresponding author

Correspondence to Qisong Shi.

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Jiao, J., Zhang, J., Lin, Q. et al. High performance flexible piezoelectric sensor based on metal–organic framework (UIO-66) and Bi4Ti3O12 composite film for human motion detection. J Mater Sci: Mater Electron 36, 1229 (2025). https://doi.org/10.1007/s10854-025-15299-5

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