Fig. 2
From: Moderate strain induced indirect bandgap and conduction electrons in MoS2 single layers

Quantifying the strain in MoS2 bubbles. Raman spectra averaged over bubbles (red) and flat regions (black). Left inset shows a Raman intensity map of the MoS2/Au(111) interface, where bright regions can be associated with the presence of larger MoS2 bubbles. Right inset shows the comparison with theoretically calculated Raman spectrum displaying the best agreement for 2% biaxial tensile strain