We present pressure-dependent Raman studies on monolayer 1H tungsten disulfide (WS₂) supported on a polymer substrate up to 20 GPa. The structural deformation starts at ~2.9 GPa by observing a split in A′₁ mode. At ~8 GPa, first order Raman modes exhibit a change in pressure coefficients of phonon frequencies, and four new modes at 187, 248, 282, and 317 cm⁻¹ appear, which become increasingly dominant with pressure. As the new modes are identified with the 1T′ phase, our Raman results show a mixed phase of 1T′ and 1H above 8 GPa. Our results suggest that biaxial (planar isotropic) compressive strain plays in inducing the phase ‬‬‬ transition at a relatively lower pressure in polymer-supported monolayer as compared to bulk WS₂.‬ ‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬

我们对支持在高达 20 GPa 的聚合物基底上的单层 1H 二硫化钨 (WS ₂ ) 进行了压力相关的拉曼研究。通过观察到 A' ₁模式的分裂，结构变形开始于~2.9 GPa 。在~8 GPa 处，一阶拉曼模式表现出声子频率压力系数的变化，并且在 187、248、282 和 317 cm ^{-1 处}出现了四种新模式，随着压力的增加，这些模式变得越来越占优势。由于新模式被识别为 1T' 相，我们的拉曼结果显示 8 GPa 以上的 1T' 和 1H 的混合相。我们的结果表明，与本体 WS ₂相比，双轴（平面各向同性）压缩应变在聚合物支撑的单层中以相对较低的压力诱导相变‬‬‬‬‬‬‬‬‬‬‬‬‬‬.‬ ‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬ ‬‬‬‬‬‬‬‬‬‬