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HOPG - ZYH Carbon Foil (Light Tight)

Available Configurations

Properties common to all products in this list

Commodity: Metals Material: Carbon Form: Foil (Light Tight) Grade: HOPG - ZYH Composition: C CAS Number: 7440-44-0 Thickness: 2mm Coating: Uncoated Light Tight: Light Tight Surface Finish: Standard
HOPG - ZYH Carbon Foil (Light Tight) is a form of highly oriented pyrolytic graphite engineered for zero light transmission and high vacuum compatibility. ZYH-grade material is defined by a mosaic spread of 3.5–5°, which balances good crystallographic alignment with cost-efficiency. This light-tight version retains the low surface roughness and high purity of standard HOPG, while preventing any optical or near-IR radiation from penetrating. It is essential for applications in optical system isolation, photon-sensitive detector enclosures, and photoelectron spectroscopy under UHV. Its conductive basal planes also support STM/AFM calibration, electrochemical interfaces, and low-background substrates in electron microscopy. The foil performs reliably under thermal cycling and radiation environments, making it ideal for beamline diagnostics and high-resolution surface science. Researchers rely on this material for precise signal control and reproducible surface behavior in both academic and industrial instrumentation.
Starting at $400.00 each
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Material Properties

Atomic Properties
Element Value
Atomic number 6
Crystal structure Hexagonal/Diamond
Electronic structure He 2s² 2p²
Valences shown 2, 3, 4
Atomic weight( amu ) 12.011
Thermal neutron absorption cross-section( Barns ) 0.0034
Photo-electric work function( eV ) 4.8
Natural isotope distribution( Mass No./% ) 12/ 98.89
Natural isotope distribution( Mass No./% ) 13/ 1.11
Atomic radius - Goldschmidt( nm ) 0.077
Ionisation potential( No./eV ) 6/ 490
Ionisation potential( No./eV ) 4/ 64.5
Ionisation potential( No./eV ) 1/ 11.26
Ionisation potential( No./eV ) 3/ 47.9
Ionisation potential( No./eV ) 2/ 24.38
Ionisation potential( No./eV ) 5/ 392
Mechanical Properties
Element Value
Hardness - Mohs 0.5-1
Hardness - Mohs 10
Material condition Diamond
Material condition Graphite
Bulk modulus( GPa ) 33
Bulk modulus( GPa ) 542
Tensile modulus( GPa ) 4.8
Electrical Properties
Element Value
Electrical resistivity( µOhmcm ) 1375@0°C
Thermal emf against Pt (cold 0C - hot 100C)( mV ) 0.7
Physical Properties
Element Value
Boiling point( C ) 5000
Density( gcm⁻³ ) 2.25@20°C
Thermal Properties
Element Value
Melting point( C ) 3650
Specific heat( J K⁻¹ kg⁻¹ ) 712@25°C
Thermal conductivity( W m⁻¹ K⁻¹ ) 80-240@0-100°C
Coefficient of thermal expansion( x10⁻⁶ K⁻¹ ) 0.6-4.3@0-100°C
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Available Configurations

Properties common to all products in this list

Commodity: Metals Material: Carbon Form: Foil (Light Tight) Grade: HOPG - ZYH Composition: C CAS Number: 7440-44-0 Thickness: 2mm Coating: Uncoated Light Tight: Light Tight Surface Finish: Standard

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