Fig. 6: Comparative, mechanistic descriptions of the slow vs. fast heating induced transformations. | npj 2D Materials and Applications

Fig. 6: Comparative, mechanistic descriptions of the slow vs. fast heating induced transformations.

From: Direct visualization of out-of-equilibrium structural transformations in atomically thin chalcogenides

Fig. 6

a Schematic diagram showing that the rapid heating rate leads to the formation of S vacancies and adatoms (yellow circles). Diffusion of S vacancies allows Mo adatoms (purple circles) to recombine with S adatoms before they evolve as volatile elemental products (yellow, S2, S8) and leave the system. b In contrast, a slow heating rate prevents Mo adatom formation before S compounds become volatile, preventing subsequent reformation of Mo–S bonds. This results in the system being driven into a two-phase regime composed of Mo-rich regions and amorphous MoS2 regions.

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