||Dithioxotantalum, Tantalum (IV) sulfide, Bis(sulfanylidene)tantalum
|Classification / Family
Transition metal dichalcogenides (TMDCs), 2D charge-density wave (CDW) materials, Nano-electronics, Nano-photonics, Superconductivity, Photovoltaic, Materials science
||Synthetic - chemical vapour transport (CVT)
||2D CDW materials
||> 3000 °C
Tantalum disulfide (TaS2) is a family member of two-dimensional (2D) metallic transition metal dichalcogenides (MTMDCs). It is of great research interest due to its rich phase diagrams that include superconductivity, charge-density wave (CDW), and metal-insulator transitions.
Coexistence of CDW order and superconductivity has been found in atomically-thin TaS2. Such properties are mainly attributed to its reduced dimensionality and the induced quantum confinement effect. Reduced dimensionality can strengthen superconductivity in the case of thin TaS2, as opposed to the weakening effect that has been found in other 2D materials.
Tantalum disulfide powder can be used to grow large-area uniform, thickness-controllable 2H-TaS2 films and domains for the investigation of fundamental physical phenomena (such as CWD). TaS2 powder can also be exfoliated into ultra-thin films by liquid chemical exfoliation to explore its superconductivity.
Tantalum disulfide powder is obtained via the CVT method, with a purity in excess of 99.995% achieved.
Tantalum disulfide powder is suitable for liquid chemical exfoliation to prepare TaS2 nanosheets and nanoparticles down to few-layer films. TaS2 powder is also used for preparation of mono-layer and few-layer films via chemical vapour deposition (CVD).
Literature and Reviews
Enhanced superconductivity in atomically thin TaS2, E. Navarro-Moratalla et al., Nat. Commun., 7:11043 (2016); DOI: 10.1038/ncomms11043.
Two-dimensional metallic tantalum disulfide as a hydrogen evolution catalyst, J. Shi et al., Nat. Commun. 8, 958 (2017); DOI: 10.1038/s41467-017-01089-z.
Enhancement of superconductivity under pressure and the magnetic phase diagram of tantalum disulfide single crystals, M. Abdel-Hafiez et al., Sci. Rep., 6, 31824 (2016); DOI: 10.1038/srep31824.
2H→1T Phase Engineering of Layered Tantalum Disulfides in Electrocatalysis: Oxygen Reduction Reaction, J. Luxa et al., Chem.Eur.J.,23,8082 –8091 (2017); DOI:10.1002/chem.201701494.