Ultrathin two-dimensional metallic nanomaterials

Two dimensional (2D) nanomaterials, such as graphene, black phosphorus, covalent-organic frameworks, hexagonal boron nitride, layered double hydroxides, metals, metal oxide, metal-organic frameworks, MXenes, and transition metal dichalcogenides, have attracted increasing attention during recent years. Compared with other 2D nanomaterials, the 2D metallic nanomaterials have their own specialties as well as corresponding applications. In this review, different synthesis methods for 2D metallic nanomaterials are systematically presented, aiming to supply possible fabrication routes and assist the study in this domain. The main applications of the 2D metallic nanomaterials are also discussed.