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Page 4 of 13 Zhang et al. Soft Sci. 2025, 5, 17 https://dx.doi.org/10.20517/ss.2024.68
Figure 1. Design, fabrication and application of the sensor. (A) Schematic diagram illustrating the preparation of MXene by the
hydrochloric acid-etching method; (B) SEM image of the MXene sheets; (C) Schematic diagram illustrating the fabrication of the
MXene-based piezoresistive layer and the interdigital silver electrodes on dust-free paper and the assembly of the sensor unit; (D)
Schematic diagram illustrating the sensor unit integrated into the airbag pillow for snoring monitoring and the sensor array for head
posture recognition by machine learning. SEM: Scanning electronic microscopy.
prepared sensitive layer is compressed on top of the electrode layer to obtain the single sensor unit
[Figure 1C, right part].
