The controlled vapour phase synthesis of molybdenum disulphide atomic layers and a fundamental mechanism for the nucleation, growth and grain boundary formation in its crystalline monolayers are now reported. Using high-resolution electron microscopy imaging, the atomic structure of the grains and their boundaries in the polycrystalline molybdenum disulphide atomic layers are examined, and the primary mechanisms for grain-boundary formation are evaluated.
- Sina Najmaei
- Zheng Liu
- Jun Lou
