Figures & data
Figure 1. (a) Chemical structures of natural rubber, PVP, 11-AA, and PEDOT:PSS. (b) Schematic of the natural rubber/AgNW/PEDOT:PSS composite film. (c) Photograph of the composite film attached on skin. (d) Photograph of the composite film stretched up to 1350%.
Figure 2. Schematic of the procedure for fabricating the natural rubber/AgNW/PEDOT:PSS composite film.
Figure 3. (a) Sheet resistance and (b) relative resistance changes under various strains for natural rubber/AgNW/PEDOT:PSS (w/ and w/o FS-31) composite films. (c) Transmittance spectra of the composite films w/ and w/o FS-31 in PEDOT:PSS. (d) Sheet resistance and (e) relative resistance changes under various strains for natural rubber/AgNW/PEDOT:PSS composite films prepared with different spin-speeds of PEDOT:PSS. (f) Transmittance spectra of the composite films with PEDOT:PSS prepared with different spin-speeds.
Figure 4. SEM images of (a) natural rubber/AgNW and (b) natural rubber/AgNW/PEDOT:PSS composite films under 0 and 80% tensile strains.
Figure 5. (a) Relative resistance changes of composite films with and without PEDOT:PSS layers as a function of tensile strains. (b) Gauge factor of the composite film with the PEDOT:PSS layer. Relative resistance changes of composite films with and without PEDOT:PSS layers as a function of (c) stretching-releasing cycles (strain: 30%), (d) bending cycles(bending radius: 4 mm), (e) the number of tape attach-detach test. Real-time relative resistance changes of the PEDOT:PSS-coated films induced by f)compressing free-standing films (weight: 10 and 20 gram) and (g) touching by finger. Relative resistance changes of composite films with and without PEDOT:PSS layers, which are dipped in (h) ethanol and (i) IPA.
Figure 6. Detection of various human activities using on-skin sensors. Responsive curves of the sensors on (a, b) wrist, (c) palm, (d) finger, (e) knee, (f) sole of the foot, (g) voice, (h) breathing, and (i) blinking eyes.
