"Monolayer molybdenum disulfide (MoS2) … is widely used in a broad range of industries due to its extraordinarily different material properties compared to its bulk counterpart. However, such unique behavior may be greatly affected by its capacity of energy dissipation or heat conduction, largely attributed to its inherent phonon scattering properties" . The phonons of molybdenum disulfide (but this is generally true) "may be greatly affected by parameters such as temperature, defect concentration, etc., reflected by the Raman spectra evolution of A1g or E2g peaks" .