1. Fabrication of the P-P film: The P-P film was prepared through a two-step drop-coating and thermal evaporation process. Firstly, selected glass was treated with a hydrophilic surface (plasma, 30 s) as the experimental substrate. The PEDOT:PSS dispersion (2-5 mL) was dropcoated on the hydrophilic substrate, and then PEDOT:PSS film was obtained after solvent evaporation at 130 �C for 3 h. Secondly, the PVDF(HFP) solution was drop-coated on the surface of the PEDOT:PSS film and placed in an oven at 60 �C for 6 h for solvent evaporation. Here, the PVDF(HFP) solution was obtained by adding PVDF(HFP) (50-200 mg) in DMSO (2.5 mL), and stirring at 80 �C for 0.5-3 h. Finally, the sample was peeled off from the glass substrate to obtain a freestanding P-P film. The P-P films with different thicknesses were fabricated by changing the amount of PEDOT:PSS solution and the concentration of PVDF(HFP) solution. Human movements monitoring of the P-P film: The P-P film was fixed to the different parts of the human (finger, elbow, wrist, face, and throat);EQUINOX 55 spectrometer. Raman spectra were tested using RENISHAW inVia Raman microscope
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