High Oriented Pyrolytic Graphite (HOPG) Sheets

HOPG (Highly Oriented Pyrolytic Graphite) Sheets

Research Grade – ZYA / ZYB / ZYB-1
Highly Oriented Pyrolytic Graphite (HOPG) is a synthetic graphite crystal with extremely high crystallographic alignment along the c-axis. It is widely used as a standard substrate for surface science, STM/AFM imaging, graphene exfoliation, and thin film deposition.
HOPG provides atomically flat surfaces after mechanical cleavage, making it one of the most reliable reference materials for nanoscale and electronic studies.

Key Features
– Extremely low mosaic spread (down to 0.4°)
– Atomically smooth surface after cleaving
– High in-plane electrical conductivity
– Excellent crystallographic orientation
– Repeatedly cleavable for fresh surfaces
– Ideal substrate for graphene exfoliation

Available Grades
ZYA Grade (Premium Research Grade)
Mosaic Spread: 0.4° ± 0.1°
Highest crystallographic alignment
Suitable for:
High-resolution STM
Surface physics research
Epitaxial growth
Precision graphene studies

ZYB Grade (Standard Research Grade)
Mosaic Spread: 0.8° ± 0.2°
Excellent for general laboratory use
Suitable for:
Routine STM/AFM
Thin film deposition
Educational research

ZYB-1 Grade (Economical Research Grade)
Mosaic Spread: ~1.0°
Cost-effective option
Suitable for:
Teaching labs
General substrate applications
Typical Specifications

Material: Highly Oriented Pyrolytic Graphite
Surface: Flat, cleavable
Cleaving Method: Adhesive tape mechanical exfoliation
Electrical Property: High in-plane conductivity
Structure: Layered graphite crystal

Common Sizes:

10 × 10 × 1 mm
10 × 10 × 2 mm
12 × 12 × 2 mm
(Custom sizes available upon request)
Maximum available size: up to 50 × 50 mm

Applications
– Scanning Tunneling Microscopy (STM)
– Atomic Force Microscopy (AFM)
– Graphene mechanical exfoliation
– Thin film deposition substrate
– Surface adsorption studies
– Electronic transport studies
– Calibration standard for surface science

Why Choose High-Grade HOPG?
Lower mosaic spread means:
Better crystallographic alignment
Larger single-domain regions
Improved surface flatness
Higher experimental reproducibility
For high-resolution research, ZYA grade (0.4°) is recommended.