Looking ahead, we may expect precise control over the mass production of 2D metals and their exciting properties, including ferroelectricity, superconductivity, and quantum Hall conductance. More types of 2D metals can be experimentally fabricated by squeezing, which may extend to their alloys, and Janus structures. One may also explore the squeezing of amorphous and non-layered compounds to determine whether they flatten to atomic thickness. In addition, interface engineering at the 2D metal/2D semiconductor contact could suppress the rectifying effect and improve transport performance. Moreover, all-metal transistors utilizing 2D metals as gate-voltage-regulated channel materials serve as a proof-of-concept for future device platforms.

The community is called on to study the high performance of 2D metals in quantum photonics, flexible electronics, photoelectronics, biological sensing, and chemical catalysis.