Molybdenum Tungsten Disulfide Powder


Order Code: M2141C1
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Pricing

Product Code

Quantity

Price

M2141C1

500 mg

£169.3

M2141C1

1 g

£271.2

General Information

CAS number 109657-36-5
Chemical formula MoWS2
Molecular weight  204.01 g/mol
Bandgap  ~1.90 eV [1]
Classification / Family Transition metal dichalcogenides (TMDCs) alloy, 2D semiconductor materials, Nano-electronics, Nano-photonics, Materials science

Product Details

Form Powder
Preparation Synthetic - Chemical Vapour Transport (CVT)
Purity ≥ 99.995%
Structure Hexagonal
Electronic properties 2D Semiconductor
Melting point n/a
Appearance Black powder

General Description

Molybdenum tungsten disulfide (MoWS2) is a TMDC alloy. Alloying 2D TMDCs is an effective way of practically modulating the band gap. This is because alloys have good thermodynamic stability at room temperature.

Like MoS2 and WS2, MoWS2 has a hexagonal crystal structure, and bulk alloys are formed by stacking monolayer alloy together via van der Waals interactions. Each  monolayer contains one MoW plane sandwiched by two S planes, represented as an S-MoW-S layer.

Molybdenum-Tungsten-Disulfide-Powder-MoWS2-2D-structure
The crystal structure of molybdenum tungsten disulfide (MoWS2).

Applications

With a tunable band gap, band edge position, and carriers’ effective mass, thin-layer nanosheets of MoWS2 have applications in electrochemistry and possess superior hydrogen evolution reaction performance. It has also been used in the development of high-performance optical switching, Q-switching, mode-locking, optical limiting, and optoelectronic devices.

Synthesis

Molybdenum tungsten disulfide powder is obtained via the CVT method, with purity typically in excess of 99.995%.

Usage

Molybdenum tungsten disulfide powder is generally used to prepare MoWS2 quantum dot solutions and nano-platelets by liquid exfoliation assisted by sonication. High-purity MoWS2 powder can also be used in CV deposition to prepare high-quality monolayer films.

Literature and Reviews

  1. Towards band structure and band offset engineering of monolayer Mo(1−x)W(x)S2 via Strain, J.-S. Kim et al, 2D Mater. 5, 015008 (2018); doi: 10.1088/2053-1583/aa8e71.
  2. Experimental and First-Principles Investigation of MoWS2 with High Hydrogen Evolution Performance, H. Li et al., ACS Appl. Mater. Interfaces 2016, 8, 29442−29451; DOI: 10.1021/acsami.6b09620.
  3. Ordered and Disordered Phases in Mo1−xWxS2 Monolayer, W. Tan et al., Sci. Rep., 7:15124 (2017); DOI:10.1038/s41598-017-15286-9.
  4. Substrate-free layer-number identification of two-dimensional materials: A case of Mo0.5W0.5S2 alloy, X. Qiao et al., Appl. Phys. Lett. 106, 223102 (2015); doi: 10.1063/1.4921911.
  5. High pressure Raman study of layered Mo0.5W0.5S2 ternary compound, J. Kim et al., 2D Mater. 3, 025003 (2016); doi: 10.1088/2053-1583/3/2/025003.
  6. Controllable synthesis of molybdenum tungsten disulfide alloy for vertically composition-controlledmultilayer, J. Song et al., Nat. Commun., 6:7817 (2015); DOI: 10.1038/ncomms8817.
  7. Monolayers of WxMo1-xS2 alloy heterostructure with in-plane composition variations, S. Zheng et al., Appl. Phys. Lett. 106, 063113 (2015); doi: 10.1063/1.4908256.
  8. Generation of microsecond pulses at 1645 nm with MoWS2 alloy, Z. Yan et al., Opt. Mater., 84, 371–374 (2018); doi: 10.1016/j.optmat.2018.07.042.
  9. Nonlinear optical responses in two-dimensional transition metal dichalcogenide multilayer: WS2, WSe2, MoS2 and Mo0.5W0.5S2, S. Bikorimana et al., Opt. Express, 24 (18) 20685-20695 (2016); doi: 10.1364/OE.24.020685.