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Research Article

Fast-response, high-sensitivity multi-modal tactile sensors based on PPy/Ti3C2Tx films for multifunctional applications

Guangshuai XiDongzhi Zhang( )Mingcong TangHao ZhangYuehang SunYubiao ZhangHaolin CaiHui XiaDandi Zhou
College of Control Science and Engineering, China University of Petroleum (East China), Qingdao 266580, China
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Graphical Abstract

Flexible multimodal sensors based on polypyrrole (PPy)/Ti3C2Tx films show high response to both humidity and pressure. Ultimately, the data acquisition and analysis are carried out through the microcontroller, and the signal is transmitted to the mobile platform through Bluetooth to achieve real-time monitoring of human respiration and movement signals.


In recent years, multi-modal flexible tactile sensors have become an important direction in the development of electronic skin because of their excellent sensitivity, flexibility and wearable properties. In this work, a humidity-pressure multi-modal flexible sensor based on polypyrrole (PPy)/Ti3C2Tx sensitive film packaged with porous polydimethylsiloxane (PDMS) is investigated by combining the sensitive structure generation mechanism of in situ polymerization to achieve the simultaneous detection of humidity and pressure, which has a sensitivity of 89,113.4 Ω/% RH in a large humidity range of 0%–97% RH, and response/recovery time of 2.5/1.9 s. The tactile pressure sensing has a high sensitivity, a fast response of 67/52 ms, and a wide detection limit. The device also has excellent performance in terms of stability and repeatability, making it promising for respiratory pattern and motion detection. This work provides a new solution to address the construction of multi-modal tactile sensors with potential applications in the fields of medical health, epidemic prevention.

Nano Research
Pages 4410-4419
Cite this article:
Xi G, Zhang D, Tang M, et al. Fast-response, high-sensitivity multi-modal tactile sensors based on PPy/Ti3C2Tx films for multifunctional applications. Nano Research, 2024, 17(5): 4410-4419.






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Received: 25 August 2023
Revised: 18 October 2023
Accepted: 18 October 2023
Published: 12 December 2023
© Tsinghua University Press 2023