Figure 1.

An exemplary sample containing agglomerates of mostly thick mechanically exfoliated 2H MoS₂ crystals on a silicon substrate. (A) An optical microscopy image of a typical sample being ca. 2 cm long and ca. 1.5 cm wide. Visible whitish spots are agglomerates of single MoS₂ flakes. Two of such single MoS₂ flakes are presented in (B,C). Image (B) is an AFM topograph of a flake with a mean height of a central zone (excluding several lone MoS₂ pieces) of ca. 65 nm and a Z-scale of the image of 130 nm. (C) An AFM topograph of another flake with a mean height of a central zone of ca. 25 nm and a Z-scale of the image of ca. 65 nm. For images (B,C) brighter colors represent portions of the image, which are higher (Z-scale).