Synthetic Tuneability of the 1T’ -1T Phases in TMDs

In this talk, I will present our recent work on the precise synthesis of different metastable 2D Transition Metal Dichalcogenides and their use in spintronics, electrocatalysis and energy storage. I will provide an overview of the tuneability between magnetic and topologically insulating phases (1T’ and 1T) and their corresponding 2H phases at the synthesis level, which we have demonstrated for different TMD materials.<br/>The synthesis precision is scalable and based on the kinetic versus the thermodynamic control of the nucleation process, which enable the determination of the crystal structure preferentially leading to either the thermodynamically stable 2H phase or the metastable 1T’ and 1T phases. The possible mechanisms of crystallization of metastable polymorphs will be discussed and liquid phase synthesis versus chemically vapour deposited materials approaches will be compared in the light of phase control. Ultimately, the functional properties of the 1T’ and 1T phases, such as magnetism and electrocatalysis will be discussed.