Penta-MS2 (M = Mn, Ni, Cu/Ag and Zn/Cd) monolayers with negative Poisson's ratios and tunable bandgaps as water-splitting photocatalysts

Seeking novel materials with specific applications is always an attractive theme in developing two-dimensional (2D) materials. Here 10 2D pentagonal transition metal dichalcogenids are identified with high stability and their promising applications.