Figure 2
From: Synthesis, properties and potential applications of two-dimensional transition metal dichalcogenides
Mechanical propertis of MoS 2 . (a) AFM topography image of a suspended 5 ~ 7 layer MoS2 flake on SiO2/Si substrate [16]. (b) Elastic constant versus t3R−2 measured for 26 layer MoS2. The inset graph shows the same graph on a linear scale [16]. (c) AFM topography image of suspended MoS2 membranes before (left) and after (right) the experiment [17]. (d) The height profile of the membrane highlighted in c shows that adheres to the sidewalls over a vertical distance of the order of 5 nm, resulting in a pretension of between 0.02 and 0.1 Nm−1 (left). Acquired force versus z-piezo extension curves for the suspended membrane and the substrate (right). (e) Examples of loading curves for single and bilayer MoS2 and the least-squares fit of the experimental indentation curves [17].