Ossila M2302A10 is a small bulk crystal of niobium diselenide (2H-NbSe2, CAS 12034-77-4) with a typical area of ≥10 mm2 and a purity of ≥99.999%. Grown synthetically by chemical vapor transport (CVT), it serves as a source material for producing single or few-layer NbSe2 sheets through mechanical or liquid exfoliation.
NbSe2 is a group-V transition metal dichalcogenide (TMDC) with a layered hexagonal structure. In each monolayer, a niobium layer sits between two selenium layers, with Nb atoms held in trigonal prismatic coordination. The covalently bonded Se–Nb–Se layers are joined to one another by van der Waals forces, which is what allows them to be separated into thin sheets.
The 2H polytype is a 2D metal and superconductor, with a critical temperature of about 7.2 K, and atomically thin NbSe2 shows charge-density waves coexisting with superconductivity at low temperatures (T CDW = 33 K). Crystals and the films derived from them are suitable for examination by atomic force microscopy or transmission electron microscopy. The stated size is a typical representative value, and actual areas and dimensions may vary.
- Preparing monolayer and few-layer NbSe2 sheets by mechanical or liquid exfoliation.
- Studying superconductivity and charge-density-wave behaviour in atomically thin NbSe2.
- Characterising crystals and exfoliated films using atomic force microscopy or transmission electron microscopy.
- Research into next-generation electronics, optoelectronics and nanotechnology based on 2D materials.
| Brand | Ossila |
|---|---|
| CAS number | 12034-77-4 |
| Molecular formula | NbSe2 |
| Purity | ≥99.999% |
| Category | — |
| Pack sizes | — |
| Physical form | Crystal (2H-NbSe2) |
| Storage | — |
- Product code: M2302A10
- Product Code: M2302A10
- Size: Small (≥10 mm2)
- Molecular Weight: 250.83 g/mol
- Preparation: Synthetic - Chemical Vapor Transport (CVT)
- Structure: Hexagonal
- Electronic Properties: 2D metal and superconductor
- Melting Point: >1300 °C
- Color: Dark Grey/Black
- Synonyms: Niobium(IV) selenide, Columbium selenide, Bis(selanylidene)niobium
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