Intercalated phases of transition metal dichalcogenides

Abstract

Two‐dimensional transition metal dichalcogenides (TMDs) play host to a wide range of novel topological states, such as quantum spin Hall insulators, superconductors, and Weyl semimetals. The rich polymorphism in TMDs suggests that phase engineering can be used to switch between different charge order states. Intercalation of atoms or molecules into the van der Waals gap of TMDs has emerged as a powerful approach to modify the properties of the material, leading to phase transition or the formation of substoichiometric phases via compositional tuning, thus broadening the electronic and optical landscape of these materials for a wide range of applications. Here, we review the current efforts in the preparation of intercalated TMD. The challenges and opportunities for intercalated TMDs to create a new device paradigm for material science are discussed.

Self‐Assembly of 2D Nanosheets into 1D Nanostructures for Sensing NO2

“…Apart from graphene, ultrathin 2D transition metal dichalcogenide (TMD) nanosheets are receiving increasing attention due to their unique chemical and electronic properties, endowing them with great potential in various applications such as sensors, catalysis, biomedicine, (opto)electronics, and energy storage devices. [ 22–38 ] With similar 2D configuration with GO and rGO, TMD nanosheets also could serve as a new class of promising building blocks to be assembled into various nanostructures. [ 6,39 ] Previously, we developed a general polymer‐assisted assembly strategy for the self‐assembly of single‐ or few‐layer TMDs, including MoS 2 , TiS 2 , TaS 2 , TaSe 2 and WSe 2 , and GO, into helical nanofibers and nanorings with the aid of vortex.…”

Continuous orientated growth of scaled single-crystal 2D monolayer films

“…Overall, although we have witnessed great achievements over the last two decades, [127][128][129][130][131] the growth of scaled single-crystal 2D materials is still challenging. Tremendous efforts still need to be made to bury the giant gap between the laboratory-scale and industry-level in CVD growth of single-crystal 2D materials.…”

2D Materials for Environment, Energy, and Biomedical Applications

“…Researchers found several ways, such as doping, intercalation, altering the chemical composition, etc., to enhance the spacing of the layers of 2D materials to store or transport charge to control charge eff ectively. To synthesize a promising electrode material, foreign ions can be intercalated between the layers of 2D materials as the layers are stacked together through weak interactions, which allow ions or molecules to pass through them or store inside them to form active sites [46,47]. The particle size and morphology are also signifi cant to enhance charge storage performance.…”