Fig. 1From: Evaluation of pulmonary and systemic toxicity following lung exposure to graphite nanoplates: a member of the graphene-based nanomaterial familyFESEM Images Illustrating Primary Particle Size. FESEM images of dry powder samples of Gr20 (a), Gr5 (b), Gr1 (c), and CB (d) at the same magnification illustrating the difference in size of the primary particle. c Gr1 Inset: High magnification of the Gr1 sample showing the flake-like structure of the particle similar to that of Gr20 and Gr5, but on a much smaller scale. d CB Inset: High magnification of CB shows the primary particles at ~ 20 nm diameterBack to article page