Niobium Disulfide (NbS2) Powder and Crystal
CAS Number 12034-77-4
2D Materials, Low Dimensional Materials, Materials, Transition Metal Chalcogenides (TMCs), Transition Metal Dichalcogenides (TMDs)Please choose the appropriate MSDS from the list below. Links will open in a new window. If your browser does not support PDFs, you will be prompted to download the file instead.
Low price, high purity 2D metal niobium disulfide powder and crystals
For the development of next-generation electronics, optoelectronics, and nanotechnology
Technical Data | MSDS | Structure | Literature and Reviews | Related Products | Resources and Support
Niobium disulfide (NbS2), CAS number 12034-77-4, is a member of group-V transition metal dichalcogenides (TMDC). Depending the process of exfoliation and film thickness, NbS2 could have three stacking polytypes: 1T (trigonal), 2H (hexagonal), and 3R (rhombohedral) phases. 2H-NbS2 has a sandwiched layer structure, with niobium sitting in the centre half of two sulfur trigonal prismatic sites. Layers are bound by weak van de Waals forces which allows mechanical or liquid chemical exfoliation to obtain layered structures, i.e. nanoparticles or nanosheets with lower dimensions.
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≥99.999% Niobium Disulfide Crystal
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Low Cost Niobium Disulfide
Powder & Crystal
Different Forms of Niobium Disulfide
2H-NbS2 is metallic in nature with its resistance drop gradually with temperature. Clear superconducting transition is observed when the temperature moves down to 6 K. 2D NbS2 nanosheets possesses a huge number of active edge sites that allows for the application of gas sensing, chemical detection, catalyst for hydrogen evolution reaction (HER), saturable absorber, electrodes and energy storage devices.
We supply low price niobium disulfide in several different forms for a range of applications.
Niobium Disulfide Powder
Can be used for preparation of niobium disulfide nanoplates and ultrathin films
Sold by weight
≥99.995% purity
From £220
Niobium Disulfide Crystals by Size
Can be used to produce single or few-layer niobium disulfide sheets via mechanical or liquid exfoliation
Small (≥10 mm2) or medium (≥25 mm2) crystals available*
≥99.999% purity
From £520
*Typical representative size, areas/dimensions may vary
Bulk single niobium disulfide crystals are most commonly used as sources from which single or few-layer sheets can be obtained via either mechanical or liquid exfoliation. Single niobium disulfide crystal or films produced from such crystals are suitable for study using atomic force microscopy or transmission electron microscopy.
Niobium disulfide powder can also be used to prepare NbS2 nanosheets and nanoparticles by liquid-exfoliation (normally assisted by sonication), especially when it is the case of foreign elements such as hydrated sodium cations being inserted between layers by the process of intercalation to form [Nax(H2O)yNbS2] complex for application in solid-state batteries. Liquid exfoliation can provide mass production of such products.
Technical Data
CAS number | 12136-97-9 |
Chemical formula | NbS2 |
Molecular weight | 157.046 g/mol |
Bandgap | 0 |
Preparation | Synthetic - Chemical Vapour Transport (CVT) |
Structure | Hexagonal (2H) and Rhombohedral (3R) |
Electronic properties | 2D metal and superconductor (2H and 3R phase) |
Melting point | n.a. |
Colour | Black |
Synonyms | Niobium (IV) sulfide, Bis(sulfanylidene)niobium |
Classification / Family | Transition metal dichalcogenides (TMDCs), 2D semiconductor materials, Charge Density Wave (CDW), Hydrogen Revolution Reactions (HER), Nano-electronics, Nano-photonics, Photovoltaic, Materials science |
Product Details
Form | Purity |
---|---|
Powder | ≥99.995% |
Crystal | ≥99.999% |
Pricing Table
Form | Size/Weight* | Product Code | Price |
---|---|---|---|
Powder | 500 mg | M2300A1 | £220 |
Powder | 1 g | M2300A1 | £350 |
Crystal (3R -NbS2) | Small (≥10 mm2) | M2300C1 | £520 ea. |
Crystal (3R -NbS2) | Medium (≥25 mm2) | M2300C1 | £850 ea. |
*Typical representative size, areas/dimensions may vary
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MSDS Documents
Structure of Niobium Disulfide
NbS2 exhibits three stacking polytypes: 1T, 2H, and 3R phases.
The thermodynamically unfavoured 1T phase (space group: 𝑃3̅𝑚1) has one layer with a trigonal unit cell and has only been spotted in monolayer thin films, while the 2H (space group: P63/mmc) and 3R phases (space group: R3m) have two and three layers with hexagonal and rhombohedral unit cells, respectively. 2H and 3R phases have been found in multilayer films or bulk crystal and powder forms. The main difference between 2H and 3R are their stacking sequences: rotation but no in-plane translation in the 2H phase and in-plane translation but no rotation in the 3R phase.
In its 2H metallic phase, Nb atoms are surrounded by S atoms following a trigonal prismatic coordination with Nb being located in the centre of the trigonal prismatic sites. The S-Nb-S layers that make up each packet are covalently bound. The coupling between pairs of packets is bound by van der Waals forces.
Literature and Reviews
- Ultrahigh-current-density niobium disulfide catalysts for hydrogen evolution, J. Yang et al., Nat. Mater., 18, pages 1309–1314 (2019); DOI: 10.1038/s41563-019-0463-8.
- Quantum Enhancement of Charge Density Wave in NbS2 in the Two-Dimensional Limit, R. Bianco et al., Nano Lett., 19, 5, 3098–3103 (2019); DOI: 10.1021/acs.nanolett.9b00504.
- 2H-NbS2 flm as a novel counter electrode for meso-structured perovskite solar cells, F. Shao et al., Sci. Reports, 8, 7033 (2018); DOI:10.1038/s41598-018-25449-x.
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