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Additional file 1:. Supplemental Fig. 1 Characterizations of exfoliated graphite dispersion and sheet. (a) AFM image, and (b) thickness and size histogram of exfoliated graphite dispersion, and (c) XPS spectra, and (d) SEM image of exfoliated graphite sheet. Supplemental Fig.2 Equipment diagram of Heat and current process for filtrated, exfoliated graphite sheets. Supplemental Fig. 3 Relationship between the electrical conductivity of exfoliated graphite sheet and (b) treatment time and (c) treatment temperature.