fig4

Figure 4. Ultra-thin dry electrodes. (A) The physical picture of the delamination-resistant imperceptible dry electrode and its cross-section optical microscope image after contacting pig skin^[44]. Reprinted with permission. Copyright 2021, American Chemical Society. (B) Structure diagram of PDMS-gold conductor and its sample photo^[45]. Reprinted with permission. Copyright 2022, Springer Nature. (C) Schematic diagram of the single-layer porous membrane electrode (the illustration in the upper right corner is its real photo)^[48]. Reprinted with permission. Copyright 2022, American Chemical Society. (D) Description of the principle of the porous ultra-thin electrode (the illustration in the upper right corner is its physical picture)^[49]. Reprinted with permission. Copyright 2022, Springer Nature. (E) Schematic diagram of hydrogen bond in the ultrathin MXene-based electrode and SEM diagram based on the pore structure of grass-derived cellulose^[51]. Reprinted with permission. Copyright 2022, American Chemical Society. (F) Physical image and SEM image of the breathable electrode based on the electrospinning method^[54]. Reprinted with permission. Copyright 2021, American Chemical Society. (G) Process flow diagram of the ultra-thin (10 μm) fabric electrode and its SEM diagram^[55]. Reprinted with permission. Copyright 2022, Elsevier. PDMS: polydimethylsiloxane.