Fig. 3: Strain in MoS2 nanobubbles.
From: Tunable strain and bandgap in subcritical-sized MoS2 nanobubbles
εlocal maps of MoS2 from (a) 25 nm × 25 nm and (b) 130 nm × 130 nm periodic MD cells containing a relaxed bubble of R = 6.7 nm and R = 26.4 nm, respectively. For visual guidance, the bubble’s perimeters are drawn in (a, b) with a dashed yellow contour. Scale bars: (a) 5 nm, (b) 20 nm. c Strain (ε) and height (z) profiles—marked with a green line in (a)—across the MoS2 nanobubble (R = 6.7 nm). d εbubble vs. R obtained from STM and MD (see Supplementary Equation 12 for the details of the strain measurement by STM) The MD εbubble calculations correspond to the averaged (in-bubble) εlocal values obtained inside the MoS2 bubbles. e, f The estimated probability density functions (PDFs) of the εlocal data from the simulated MoS2 bubbles with R < Rc (Rc,MD ≈ 13 nm) and with R > Rc, respectively.
