SLSiN (acronym for S ingle- L ayer Si licon N itride), a novel 2D material introduced as the first post-graphene member of Si 3 N 4, was first discovered computationally in 2020 via density-functional theory based simulations. This new material is inherently 2D, insulator with a band-gap of about 4 eV, and stable both thermodynamically and in terms of lattice dynamics.