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. 2019 Sep 9;10:4087. doi: 10.1038/s41467-019-12044-5

Fig. 2.

Fig. 2

Structural characterization of GO/PPy actuator. SEM image of a the GO film side and b the PPy side; cross-sectional SEM image of GO/PPy actuators fabricated on the basis of GO films with different thicknesses of c 12.8 μm, d 25.2 μm and e 37.1 μm; f XPS spectra of GO and GO/PPy; g XRD pattern of GO and GO/PPy; h Raman spectra of GO and GO/PPy; i FT-IR spectra of pure GO and GO/PPy