HOPG (Highly oriented pyrolytic graphite)

HOPG Highly oriented pyrolytic graphite Highly oriented pyrolytic graphite is a metal. The layers are stacked together via van der Waals interactions and can be exfoliated into thin 2D layers. To buy HOPG crystals please click here.

The HOPG crystals have a lateral size of ~1.2 cm and a thickness of 2mm. We have two different grades of HOPG available. The ZYA grade HOPG and ZYB HOPG. Crystal purity is the same for both grades. Main difference is the mosaic spread. More information about the HOPG crystals we sell can be found below.

HOPG crystal properties
Crystal size ~1.2 cm square, 2 mm thickness
Electrical properties Metal
Crystal structure Hexagonal
Unit cell parameters a = b =0.246, c = 0.667 nm, α = β = 90°, γ =120°
Type Synthetic
Purity >99.995 %
Characterized by XRD, Raman, EDX
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The single crystal HOPG 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 HOPG:

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X-ray diffraction on a HOPG single crystal aligned along the (001) plane. XRD was performed at room temperature using a D8 Venture Bruker. The 3 XRD peaks correspond, from left to right, to (00l) with l = 1, 2, 3

HQ Graphene Wiki on:

HOPG (Highly oriented pyrolytic graphite )

1. Verbakel, J.D., et al. "Valley-protected one-dimensional states in small-angle twisted bilayer graphene." Physical Review B 103.16 (2021): 165134.

2. Tu, Y., et al. "Ultrathin Single‐Crystalline 2D Perovskite Photoconductor for High‐Performance Narrowband and Wide Linear Dynamic Range Photodetection." Small 16.52 (2020): 2005626.

3. Wu, L., et al. "Polarity‐Switchable and Self‐Driven Photo‐Response Based on Vertically Stacked Type‐III GeSe/SnS2 Heterojunction." Advanced Materials Interfaces 9.12 (2022): 2102099.

4. Auslender, A., et al. "Mean inner potential of graphite measured by electron holography: Probing charge distribution and orbital diamagnetic susceptibility." Carbon 179 (2021): 288-298.


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