fig4

Figure 4. Demonstration of the gradual two-dimensionalization of electrons with increasing interlayer distance. The valence electron distribution of (A) bulk TiS₂, (B) TiS₂ with a van der Waals gap of 9.65 Å, (C) TiS₂ with a van der Waals gap of 13.9 Å and (D) single layer TiS₂.