Metallic 2M or 1T′-phase transition metal dichalcogenides (TMDs) are characterized by interesting properties, but they are metastable. Here, the authors demonstrate that the thermal and oxidation stability of 2M WS2 significantly increases as the thickness is reduced down to monolayer, expanding the potential applications of 2M TMDs.
- Xiangye Liu
- Pingting Zhang
- Cao Guan
