Emerging Versatile Two-Dimensional MoSi2N4 Family

The discovery of 2D layered MoSi2N4 and WSi2N4 without knowing their 3D parents by chemical vapor deposition in 2020 has stimulated extensive studies of 2D MA(2)Z(4) system due to its structural complexity and diversity as well as versatile and intriguing properties. Here, a comprehensive overview on the state-of-the-art progress of this 2D MA(2)Z(4) family is presented. Starting by describing the unique sandwich structural characteristics of the emerging monolayer MA(2)Z(4), their versatile properties including mechanics, piezoelectricity, thermal transport, electronics, optics/optoelectronics, and magnetism is summarized and anatomized. The property tunability via strain engineering, surface functionalization and layered strategy is also elaborated. Theoretical and experimental attempts or advances in applying 2D MA(2)Z(4) to transistors, photocatalysts, batteries and gas sensors are then reviewed to show its prospective applications over a vast territory. New opportunities are further discussed and prospects are suggested for this emerging 2D family. The overview is anticipated to guide the further understanding and exploration on 2D MA(2)Z(4).

Automated summary

The discovery of 2D layered MoSi2N4 and WSi2N4 in 2020 has led to extensive studies on the 2D MA(2)Z(4) system. This overview provides a comprehensive summary of the progress in this family, including its unique structural characteristics and versatile properties. It also discusses various methods for tuning properties, as well as the theoretical and experimental applications in transistors, photocatalysts, batteries, and gas sensors. The overview offers insights and prospects for further exploration of the 2D MA(2)Z(4) system.