Two-dimensional materials present exceptional crystal elasticity and provide an ideal platform to tune electrical and optical properties through the application of strain. Here we extend recent research on strain engineering in monolayer molybdenum disulfide using an adamantane plasma polymer pinning layer to achieve unprecedented crystal strains of 2.8%. Using micro-reflectance spectroscopy, we report maximum strain gauge factors of −99.5 meV/% and −63.5 meV/% for the A and B exciton of monolayer MoS₂, respectively, with a 50 nm adamantane capping layer. These results are corroborated with photoluminescence and Raman measurements on the same samples. Taken together, our results indicate that adamantane polymer is an exceptional capping layer to transfer substrate-induced strain to a 2D layer and achieve higher levels of crystal strain.

二维材料具有出色的晶体弹性，并提供了一个通过施加应变来调节电学和光学特性的理想平台。在这里，我们扩展了最近对单层二硫化钼应变工程的研究，使用金刚烷等离子体聚合物钉扎层实现了前所未有的 2.8% 的晶体应变。_{使用微反射光谱，我们报告单层 MoS 2}的 A 和 B 激子的最大应变计因子为 -99.5 meV/% 和 -63.5 meV/%, 分别具有 50 nm 的金刚烷覆盖层。这些结果通过对相同样品的光致发光和拉曼测量得到证实。总之，我们的结果表明，金刚烷聚合物是一种特殊的覆盖层，可将基板引起的应变转移到二维层并实现更高水平的晶体应变。