▎ 摘　　要

It is shown that, by processing a graphite suspension in ethanol or water by ultrasound and centrifuging, it is possible to obtain particles with thicknesses within 1-6 nm and, in the most interesting cases, 1-1.5 nm. Analogous treatment of a graphite suspension in organic solvent yields eventually thicker particles (up to 6-10 nm thick) even upon long-term treatment. Using the proposed ink based on graphene and aqueous ethanol with ethylcellulose and terpineol additives for 2D printing, thin (similar to 5 nm thick) films with sheet resistance upon annealing similar to 30 M Omega/a- were obtained. With the ink based on aqueous graphene suspension, the sheet resistance was similar to 5-12 k Omega/a- for 6- to 15-nm-thick layers with a carrier mobility of similar to 30-50 cm(2)/(V s).