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(A) DOD printer for the printing of graphene suspension; (B) SEM image of printed pattern cross-sectional view; (C) image of printed graphene suspension a contour in which the average height was measured through the white line. (D) Sample print section (20× magnification). (E) height vs. distance of the sample line in (C). (F) SEM image of the printed graphene suspension top view after annealing. Reproduced from [187], with permission from the authors, 2020.
