Claim: Titanate nanosheet (TiO6 octahedra are edge-linked in a -type 2D lattice) have a number of unique properties and are a finite ultrathin sheets.
Evidence: Structurally, they are infinite ultrathin (~0.75 nm) 2D sheets with a high density of negative surface charges originating from the oxygen atoms at the corners of the adjoint octahedrons .