Fig. 1: STM measurements of MoS2/Au(111) nanobubbles.
From: Tunable strain and bandgap in subcritical-sized MoS2 nanobubbles
a STM topography of monolayer MoS2 exfoliated on Au(111) displaying the characteristic moiré-patterned terraces separated by monoatomic steps. The bright protrusions correspond to nanometer-sized MoS2 bubbles. Setpoint for the measurement: bias voltage Vbias = 1.5 V, tunneling current It = 0.3 nA. Scale bar: 20 nm. b STM image of a MoS2 nanobubble of R = 1.9 nm. Setpoint: Vbias = 0.5 V, It = 0.6 nA. Scale bar: 2 nm. c Profile of a MoS2 nanobubble (R = 4.2 nm), marked with a green line in (a). d The evolution of h/R with R in MoS2 nanobubbles as obtained by STM and AFM measurements. The gray line obtained by exponential regression provides a visual guide. Each data point corresponds to an individual MoS2 bubble.
