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Figure 9. Anti-crosstalk strategies of sensor array. (A) Shared dielectric layer and isolated dielectric units. Reproduced with
permission [101] . Copyright 2023 Elsevier; (B) Schematic illustration of the fabrication process of the crosstalk-minimized array with a 3D
printed substrate. Reproduced with permission [102] . Copyright 2023 Elsevier; (C) Fabrication process of the crosstalk-free flexible
piezoelectric pressure sensors. Reproduced with permission [103] . Copyright 2023 Elsevier; (D) Finite element model analysis of three
models with different interconnect patterns. Reproduced with permission [31] . Copyright 2022 Wiley-VCH; (E) Exploded view of the
crosstalk-free piezoresistive sensor array with serpentine electrodes and optical images of the sensor array with weights of 1 and 2 g
placed in shapes of X and 2D pressure data monitored by LabView. Reproduced with permission [104] . Copyright 2024 Wiley-VCH.
PDMS: Polydimethylsiloxane; NFs: nanofibers; PI: polyimide; 2D: two-dimensional; 3D: three-dimensional; TPU: thermoplastic
polyurethane; M-nWF: MXene coated nonwoven fabric.

modeling and experiments. The serpentine interconnect design was found to be the most effective,
significantly reducing crosstalk between units. This resulted in an 8×8 sensor array with a resolution of 0.7
mm. Inspired by the serpentine interconnect pattern’s crosstalk-suppression, Yuan et al. developed a sensor
array combining a PI microporous isolation layer (PIL) and serpentine electrodes with flexible piezoresistive
sensors . As shown in Figure 9E, the serpentine electrodes and PI isolation layer effectively suppressed
[104]
crosstalk between array units. Experimental results demonstrated that the brightness pattern of the
integrated LED array directly captured the shape of a two-dimensional (2D) figure with low crosstalk. These
works, based on diverse design strategies, have realized crosstalk-resistance in flexible sensor arrays, offering
novel ideas for future crosstalk-suppression approaches.