NbSe2 (2H Niobium Diselenide)

2H NbSe2 Niobium Diselenide 2H-NbSe2 is a metal, a superconductor with Tc ~7.2K and a Charge Density Waves (CDW) system with Tcdw of ~33K. The layers are stacked together via van der Waals interactions and can be exfoliated into thin 2D layers. 2H NbSe2 belongs to the group-V transition metal dichalcogenides (TMDC). To buy NbSe2 crystals please click here.

The 2H phase Niobium Diselenide crystals produced at HQ Graphene have a typical lateral size of ~0.6-0.8 cm, hexagonal shaped and have a metallic appearance. A selection of peer review publications on the NbSe2 we sell can be found below.

2H-NbSe2 crystal properties
Crystal size ~10 mm
Electrical properties Metal, Superconductor (Tc~7.2K), Charge Density Waves (CDW) system, Tcdw ~33K
Crystal structure hexagonal
Unit cell parameters a = b = 0.344 nm, c = 1.255 nm, α = β = 90°, γ = 120°
Monolayer properties Link to C2DB containing calculated properties
Type Synthetic
Purity >99.995 %
Characterized by XRD, Raman, EDX
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The single crystal 2H NbSe2 is characterized using:

XRD: single crystal and powder X-ray diffraction (D8 Venture Bruker and D8 Advance Bruker)
EDX: Energy-dispersive X-ray spectroscopy for stoichiometric analysis
Raman: 785 nm Raman system

Raman, XRD and EDX on 2H NbSe2:

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X-ray diffraction on a 2H phase NbSe2 single crystal aligned along the (001) plane. XRD was performed at room temperature using a D8 Venture Bruker. The 4 XRD peaks correspond, from left to right, to (00l) with l = 2, 4, 6, 8

Powder X-ray diffraction (XRD) of a single crystal 2H NbSe2. X-ray diffraction was performed at room temperature using a D8 Venture Bruker.

Stoichiometric analysis of a single crystal 2H NbSe2 by Energy-dispersive X-ray spectroscopy (EDX).

Raman spectrum of a single crystal 2H NbSe2. Measurement was performed with a 785 nm Raman system at room temperature.

HQ Graphene Wiki on:

2H NbSe2 (Niobium Diselenide)

1. Naoto Yabuki et al., "Supercurrent in van der Waals Josephson junction",Nature Communications 7, 10616 (2016), link to article:

2. Y. Cao et al., "Quality Heterostructures from Two-Dimensional Crystals Unstable in Air by Their Assembly in Inert Atmosphere", Nano Lett. 15 (8), 4914-4921 (2015), link to article:


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