Tungsten Disulfide (WS2) Powder
CAS Number 12138-09-9
2D Materials, Low Dimensional Materials, Transition Metal Chalcogenides (TMCs), Transition Metal Dichalcogenides (TMDs), Tungsten Disulfide (WS2)
High purity tungsten disulfide powder
For applications as a high performance lubricant
Technical Data | MSDS | Literature and Reviews
One of the most distinctive features of tungsten disulfide (WS2, CAS number 12138-09-9) is its performance as a lubricant, even under harsh conditions (e.g. high temperature and high pressure), its coefficient of friction (CoF) of 0.03 is nearly unmatched.
Depending on the techniques used in its preparation, exfoliated 2D WS2 layers have three crystal phases: octahedral (1T) and hexagonal (2H and 3R). Such phases provide opportunities for structure engineering at an atomic level to develop new optoelectronic properties. It is known that the 2H (antiparallel) and 3R (parallel) hexagonal phases are semiconducting.
Of the two hexagonal phases, 2H is the more stable form. The octahedrally-coordinated 1T phase is not stable in a bulk form, and is associated solely with single-layer films. It is believed that the 1T phase is metallic and can be transformed from 2H WS2 by electron doping (e.g. by electron irradiation or lithium ion intercalation).
High Purity
>99% Tungsten Disulfide Purity
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Quick and reliable shipping
Low Cost
Low Cost Tungsten Disulfide
Applications
Applications as a high performance lubricant
Structure of Tungsten Disulfide Powder
Applications of Tungsten Disulfide Powder
Nanosheets and nanoparticles prepared from electronic pure WS2 powders find applications in nanoelectronics, optoelectronics, gas-sensing devices, hydrogen evolution reactions, and energy storage devices. Like most TMDCs, they are of great interest in condensed matter physics and are widely explored for their photonic and optoelectronic properties.
Synthesis
Tungsten disulfide (WS2) powder is obtained via the CVT method, with a purity in excess of 99.995% achieved.
Usage
WS2 powder is suitable for liquid chemical exfoliation to prepare WS2 nanosheets and nanoparticles down to few-layer films. WS2 powder is also used for the preparation of mono-layer and few-layer films via chemical vapour deposition (CVD).
Technical Data
| CAS Number | 12138-09-9 |
| Chemical Formula | WS2 |
| Molecular Weight | 247.97 g/mol |
| Bandgap | 1.4 - 2.01 eV [1] |
| Preparation | Synthetic - Chemical Vapour Transport (CVT) |
| Structure | Hexagonal (2H) |
| Electronic Properties | 2D semiconductor |
| Melting Point | 1250 °C (lit.) |
| Colour | Black |
| Synonyms | Tungsten sulphide, Tungsten sulfide, Tungsten(IV) sulfide |
| Classification / Family | Transition metal dichalcogenides (TMDCs), 2D semiconductor materials, NIR band-gap, Nano-electronics, Nano-photonics, Transistors, Photovoltaics, Materials science |
Product Details
| Form | Purity |
| Powder | ≥99.995% |
Pricing Table
| Product Code | Form | Quantity | Price |
| M2110C1 | Powder | 500 mg | £220 |
| M2110C1 | Powder | 1 g | £350 |
MSDS Document
Tungsten disulfide powderLiterature and Reviews
- Controlled Synthesis and Transfer of Large-Area WS2 Sheets: From Single Layer to Few Layers, A. Elı´as et al., ACS Nano, 7 (6), 5235–5242 (2013); DOI: 10.1021/nn400971k.
- An effective liquid-phase exfoliation approach to fabricate tungsten disulfide into ultrathin two dimensional semiconducting nanosheets, R. Jha et al., J. Mater. Sci., 52:7256–7268 (2017); DOI 10.1007/s10853-017-0962-4.
- Enhanced Catalytic Activities of Surfactant Assisted Exfoliated WS2 Nanodots for Hydrogen Evolution, X Zhao et al., ACS Nano 2016, 10, 2159−2166; DOI: 10.1021/acsnano.5b06653.
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