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Grolltex — graphene rolling technologies
Monolayer graphene on copper foil, 6" × 6"

Monolayer graphene on copper foil, 6″ × 6″

$490.00

Single flat sheet of carbon in a hexagonal lattice, grown by CVD onto 25 μm copper foil. In stock.

Ships from San Diego 1–3 days from payment. Purchase orders accepted from institutions.

SKU: GRA-CU-6 Category:

Specifications

Specification Value
Material Monolayer graphene
Layers 1
Sheet size 6" × 6"
Substrate Oxygen-free copper foil, 25 μm
Copper spec OFE-Cu58 / ASTM C101
Surface finish Ultra-smooth, mirror
Coverage ≥95% guaranteed, typically 100%
Transmittance >97%
Growth Chemical vapor deposition
Fabrication Class 100 cleanroom
Packaging Double vacuum wrapped, N₂

Batch characterization

Representative data. The unit you receive ships with measurements from its own batch.

Raman spectrum of monolayer graphene — G peak at ~1582 cm⁻¹, 2D peak at ~2680 cm⁻¹. Intensity (A.U.) against Raman shift (cm⁻¹).
Raman spectrum of monolayer graphene — G peak at ~1582 cm⁻¹, 2D peak at ~2680 cm⁻¹. Intensity (A.U.) against Raman shift (cm⁻¹).
FET mobility on Si/SiO₂
>2700 cm²/V·s

Customers with transfer experience report ~4000 cm²/V·s values on Si/SiO2

Sheet resistance
~450 Ω/sq

However it depends on the in/post-transfer doping and measurement technique and environment

Raman D/G ratio
Per batch. D/G under 0.05

Typically, the D peak is indistinguishable on our graphene. Reported per batch on individual Certificate of Analysis.

Optical micrograph — graphene on copper, 50×
Optical micrograph — graphene on copper, 50×
Optical micrograph — grain structure, 20×
Optical micrograph — grain structure, 20×
As shipped — sealed foil, 6" × 6"
As shipped — sealed foil, 6" × 6"

Transfer and handling

  1. Open the outer cleanroom bag in a clean environment; leave the inner vacuum seal intact until transfer.
  2. Handle the foil by its edges with clean tweezers. Do not crease — a fold breaks the monolayer.
  3. For wet transfer, float the coated foil on etchant, then rinse in DI water before lifting onto your substrate.
  4. Dry under nitrogen and bake to remove residual water before device processing.

Packaging and shelf life

Each sheet is vacuum sealed in a clean, inert nitrogen environment. Secondary packaging under positive nitrogen atmosphere, in a moisture-proof, light-proof, static-proof cleanroom bag, preserves the material between uses.

Store sealed, at room temperature, away from light. Open in a clean environment immediately before transfer.

Citing this material

Monolayer CVD graphene on copper foil (GRA-CU-6), Grolltex, Inc., San Diego, CA. Cite the batch number printed on your specification sheet.

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