"Molybdenum disulfide (MoS2) is a typical transition metal dichalcogenide and it has attracted considerable attention from researchers because of its unique and tunable optical, electronic, and mechanical properties. MoS2 has a wide range of industrial applications, including as a solid lubricant material in aerospace technology and as a catalyst for complex hydrocarbon dehydrogenation. … Research into the effects of high pressure on MoS2 has been conducted for several decades. In 1982, the dependence of the A1g and E2g modes in 2H-MoS2 layer materials on the pressure was investigated … Theoretical research indicates that the MoS2 monolayer and semiconductor bilayers will gradually undergo metallization as the pressure increases" , and references therein).