Pushing detectability and sensitivity for subtle force to new limits with shrinkable nanochannel structured aerogel

Xinlei Shi, Xiangqian Fan, Yinbo Zhu, Yang Liu, Peiqi Wu, Renhui Jiang, Bao Wu, Heng-An Wu, He Zheng, Jianbo Wang, Xinyi Ji, Yongsheng Chen () and Jiajie Liang ()
Additional contact information
Xinlei Shi: Nankai University
Xiangqian Fan: Nankai University
Yinbo Zhu: University of Science and Technology of China
Yang Liu: Nankai University
Peiqi Wu: Nankai University
Renhui Jiang: Wuhan University
Bao Wu: University of Science and Technology of China
Heng-An Wu: University of Science and Technology of China
He Zheng: Wuhan University
Jianbo Wang: Wuhan University
Xinyi Ji: Nankai University
Yongsheng Chen: Nankai University
Jiajie Liang: Nankai University

Nature Communications, 2022, vol. 13, issue 1, 1-10

Abstract: Abstract There is an urgent need for developing electromechanical sensor with both ultralow detection limits and ultrahigh sensitivity to promote the progress of intelligent technology. Here we propose a strategy for fabricating a soft polysiloxane crosslinked MXene aerogel with multilevel nanochannels inside its cellular walls for ultrasensitive pressure detection. The easily shrinkable nanochannels and optimized material synergism endow the piezoresistive aerogel with an ultralow Young’s modulus (140 Pa), numerous variable conductive pathways, and mechanical robustness. This aerogel can detect extremely subtle pressure signals of 0.0063 Pa, deliver a high pressure sensitivity over 1900 kPa−1, and exhibit extraordinarily sensing robustness. These sensing properties make the MXene aerogel feasible for monitoring ultra-weak force signals arising from a human’s deep-lying internal jugular venous pulses in a non-invasive manner, detecting the dynamic impacts associated with the landing and take-off of a mosquito, and performing static pressure mapping of a hair.

Date: 2022
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DOI: 10.1038/s41467-022-28760-4

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