Tungsten Disulfide Few-Layer Film | WS2


1 Piece - Sapphire

Order Code: M2172F11
Not in stock

Pricing

Substrate Product code Size Quantity (EA) Price
Sapphire M2172F11 1 cm × 1 cm 1
£318.00

General Information

CAS number 12138-09-9
Chemical formula WS2
Molecular weight 247.97 g/mol
Bandgap 1.4 - 2.01 eV
Synonyms Tungsten sulphide, Tungsten sulfide, Tungsten (IV) sulfide
Classification / Family Transition metal dichalcogenides (TMDCs), 2D semiconductor materials, Nano-electronics, Nano-photonics, Materials science

Product Details

Substrate Sapphire
Product code M2172F11
Size 1 cm × 1 cm*
Growth Method CVD synthesis
Appearance Transparent
Purity > 99%
Transparency > 97%
Coverage > 95%
Number of Layers 2-5
Sheet Resistance n.a.
Transfer method Directly grown
Substrate Thickness 300 nm

* Other sizes available: 2 cm × 2 cm or 2 inches in diameter, 4 inches in diameter custom-made sizes. Please contact us for more details.

General Description

Few-layer tungsten disulfide (WS2) film has a 2D-layered structure with a narrow indirect bandgap of of 1.35 eV. In contrast, the monolayer film possesses a direct bandgap of 2.1 eV.

WS2 few-layer films possess very high NIR light photocatalytic activity. They also have strong UV and visible light photocatalytic activity, making them a valuable and outstanding full solar spectrum photocatalyst.

High-quality tungsten disulfide few-layer film is available as a directly-grown film on sapphire. Different sizes and substrates of monolayer WS2 films are also available via custom order. Please contact us for more details.

  • Glass (1 cm × 1 cm, 2 cm × 2 cm, 2 inches in diameter, 4 inches in diameter or custom-made sizes)
  • Silicon (1 cm × 1 cm, 2 cm × 2 cm, 2 inches in diameter, 4 inches in diameter or custom-made sizes)
  • Quartz (1 cm × 1 cm, 2 cm × 2 cm, 2 inches in diameter, 4 inches in diameter or custom-made sizes)
  • SiO2 /Si (1 cm × 1 cm, 2 cm × 2 cm, 2 inches in diameter, 4 inches in diameter or custom made sizes)
  • Copper (1 cm × 1 cm, 2 cm × 2 cm, 2 inches in diameter, 4 inches in diameter or custom-made sizes)

Applications

Due to its distinctive electron configuration and high specific surface area, few-layer tungsten disulfide nanosheets have potential applications in electrodes and energy storage devices, supercapacitors, and photoelectrochemical cells as a catalyst for hydrogen evolution reactions (HERs). With tunable electromagnetic absorption, it has practical applications against electromagnetic pollution. WS2 is also a great potential candidate in photothermal therapy for the ablation of cancer cells, when NIR light is absorbed and converted into heat.

Synthesis 

High-quality tungsten disulfide few-layer films were grown directly on the substrates (sapphire) via the chemical vapour deposition (CVD) method.

Usage

WS2 few-layer films can be used for research purposes such as microscopic analysis, photoluminescence, and Raman spectroscopy studies. Few-layer WS2 films can also be transferred to other substrates.


Literature and Reviews

  1. Photoluminescence enhancement in fewlayer WS2 films via Au nanoparticles, S. Choi et al., AIP Advances 5, 067148 (2015); DIO: 10.1063/1.4923183.
  2. Excitation energy dependence of Raman spectra of few-layer WS2, J. Yang et al., FlatChem 3, 64–70 (2017);DIO: 10.1016/j.flatc.2017.06.001.
  3. Few-layer thick WS2 nanosheets produced by intercalation/exfoliation route, F. Huang et al., J. Mater. Sci., 51, 10160–10165 (2016); DOI 10.1007/s10853-016-0243-7.
  4. Accurate identification of layer number for few-layer WS2 and WSe2 via spectroscopic study, Y. Li et al., Nanotechnology 29, 124001-124008 (2018);DIO: 10.1088/1361-6528/aaa923.
  5. Photosensor Device Based on Few-Layered WS2 Films, N. Perea-López, Adv. Funct. Mater., 23, 5511–5517 (2013); DOI: 10.1002/adfm.201300760.
  6. Identification of individual and few layers of WS2 using Raman Spectroscopy, A. Berkdemir et al., Sci. Rep., 3, 1755 (2013); DOI: 10.1038/srep01755.

To the best of our knowledge the technical information provided here is accurate. However, Ossila assume no liability for the accuracy of this information. The values provided here are typical at the time of manufacture and may vary over time and from batch to batch.