Silver Tantalum Sulfide (AgTaS3) Powder
2D layered Silver tantalum sulfide (AgTaS3) belongs to the family of ternary metal sulfides which are promising alternatives to noble metals for its excellent redox reversibility, high electronic conductivity and capacitance. Binary metal sulfides can be used as electrode materials for lithium-ion batteries (LIBs), supercapacitors (SC), and solar cells applications.
Atomically thin AgTaS3 layers can be synthesized through a facile probe sonication exfoliation of either bulk crystals or powder.
|Full name||Silver tantalum sulfide|
|Molecular weight||385.01 g/mol|
Eg = 0.006 eV
|Classification / Family||Ternary metal sulfides (TMSs), 2D Semiconductor materials, Nano-electronics, Nano-photonics, Transistors, Photovoltaics, Materials science|
|Acquire method||Synthetic - Chemical Vapour Transport (CVT)|
|Electronic properties||2D semiconductor, Weyl semimetals|
AgTaS3 crystallizes in the orthorhombic Cmcm space group in three dimensional structure. Ta5+ is bonded in a 8-coordinate geometry to eight S2- atoms while Ag+ is bonded in a 2-coordinate geometry to six S2- atoms. S2- sites are inequivalent in the structure with each of one set of S2- ions is bonded in a 3-coordinate geometry to three equivalent Ta5+ and two equivalent Ag+ atoms while each of the other set S2- ions is bonded to two equivalent Ta5+ and two equivalent Ag+ atoms to form corner-sharing [STa2Ag2] tetrahedra.
The layer is composed of Ta-centred bicapped trigonal prisms stacked on top of each other by sharing triangular faces with each layers are held together through van der Waals interactions. Ag+ions reside in the distorted octahedral sites between the layers.
AgTaS3 is nonlinear in optical response thus can have applications in signal processing, optical computers, ultrafast switches, ultra-short pulsed lasers, sensors and laser amplifiers,
AgTaS3 also may also be used for for low-power and high-speed electronics.
Obtained via the CVT method, AgTaS3 powder with purities of over 99.995% have been achieved.
AgTaS3 powder is suitable for liquid chemical exfoliation to process AgTaS3 nano-plates down to few-layer films. High-quality, high-purity AgTaS3 powder is also used for CV deposition of ultra-thin single or few-layer films.
Literature and Reviews
- Comprehensive scan for nonmagnetic Weyl semimetals with nonlinear optical response, Q. Xu et al., npj Comput Mater 6, 32 (2020); DOI: 10.1038/s41524-020-0301-1.
- Structure and Electrical Conductivity of AgTaS3, C. Kim et al., J. Solid State Chem., 132 (2), 389-391 (1997); DOI: 10.1006/jssc.1997.7478.
- Structure and properties of a new compound AgTaS3, H. Wada et al., J. Solid State Chem., 97 (1), 29-35 (1992); DOI: 10.1016/0022-4596(92)90005-G.
- Raman and infrared studies of a silver–tantalum sulfide with a layered structure, M. Ishii et al., Mater. Res. Bull., 35 (8), 1361-1368 (2000); DOI: 10.1016/S0025-5408(00)00324-X.
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