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Examples of graphene-coated textile ECG electrodes and resulting signals: (a) photograph of a sample grapheme-clad nylon fabric for ECG electrode, adopted from [63]; (b) graphene-coated polyester fiber electrode, adopted from [25]; (c) ECG signals recorded from conventional Ag/AgCl electrodes and the graphene-clad textile with wristband, adopted from [39]; and (d) filtered ECG signals from Ag/AgCl and graphene-clad textile electrodes, adopted from [63].
