fig6

Figure 6. Representative examples of resistive, capacitive, and piezoelectric sensors for flexible sensing applications. (A) Different sensing signals for tactile and slip sensing of objects are captured using ultrasensitive touch sensors. Adapted with permission from Ref.^[111], Copyright © 2024 Wiley-VCH GmbH; (B) Schematic diagram of the MPSS sensor to be applied in hearing aid. Adapted from Ref.^[114], under CC BY 4.0 license; (C) Fabrication process and photograph of the strain sensor. Adapted from Ref.^[121], under CC BY-NC 4.0 license; (D) Image displaying the fabricated 15 × 15 flexible capacitive pressure sensor array. Reprinted from Ref.^[125], under CC BY-NC-ND 4.0 license; (E) Optical images and physical photos of smart wristbands based on flexible piezoelectric ion sensors. Adapted with permission from Ref.^[131], Copyright © 2025 Wiley-VCH GmbH; (F) Schematic image and digital photographs of the implantation of packaged piezoelectric-device in the thigh and chest areas of rats. Adapted with permission from Ref.^[132], Copyright © 2025 Wiley-VCH GmbH. MPSS: MXene/polyvinyl alcohol sound sensor.