Fig. 1 | npj Flexible Electronics

Fig. 1

From: Wearable multifunctional printed graphene sensors

Fig. 1

a Cross-sectional SEM image of the porous carbon network lying on the top of polyimide (scale bar: 30 μm). b Low-magnification SEM image shows the porous morphology of LIG (scale bar: 15 μm). c High-magnification SEM image shows the graphene flakes randomly arranged and interconnected (scale bar: 5 μm). d Raman spectrum of LIG acquired with a laser wavelength of 473 nm. e High-resolution XPS spectrum of the C1s region of LIG

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