fig7

Figure 7. Representative examples of triboelectric and magnetic sensors for flexible sensing applications. (A) Schematic illustration of cardiac sounds sensing using the triboelectric stethoscope and exploded view diagram of the overall design structure. Adapted with permission from Ref.^[146], Copyright © 2024 Wiley-VCH GmbH; (B) Structure of the triboelectric tactile perception smart finger. Adapted from Ref.^[169], under CC BY-NC 4.0 license; (C) The 3D object tele-perception system based on the bionic electroreceptor matrix (20 × 20 units) and the CNN. Adapted from Ref.^[172], under CC BY 4.0 license; (D) Optical images of the prepared magnetoelectric tactile sensor and the sensor installed at the tip of the robot arm. Adapted from Ref.^[195], under CC BY 4.0 license. CNN: Convolutional neural networks; Al: aluminium; FEP: fluorinated ethylene propylene; PI: polyimide; ABS: acrylonitrile butadiene styrene; OLED: organic light-emitting diode.