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Microscopy image of monolayer graphene (WF1L) transferred onto 90 nm SiO2/Si
Microscopy image of monolayer graphene (WF1L) transferred onto 90 nm SiO2/Si
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Monolayer graphene on polymer

WF1L

Specifications
  • Monolayer graphene on polymer
  • Graphene on water-soluble sacrificial film
  • 15 cm x 28 cm or 15 cm x 15 cm
  • For applications requiring strictly monolayer graphene
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How Our Product Works

Cut and Prepare
the Sheet

Cut the graphene sheet to the desired size. Peel off the backing sheet using tweezers, ensuring the graphene side is exposed for transfer.

Place the graphene side in contact with the application substrate and laminate the surfaces with the application of pressure and temperature.

Laminate
the Graphene
Dissolve the
Water-Soluble Layer

Submerge the laminated substrate in a DI water bath overnight to dissolve the water-soluble polymer film. Ensure the graphene side is facing up and does not touch any surfaces during this process.

After the film has dissolved, remove the substrate and rinse thoroughly with DI water. Dry using a compressed air or nitrogen.

Rinse
and Dry
Verify Graphene
Transfer
Examine the surface to ensure the graphene has adhered smoothly to the substrate. The transferred graphene layer should now be visible and ready for use.

Frequently Asked Questions

General Graphene Questions

Graphene is a single atomic layer of sp²-bonded carbon atoms arranged in a hexagonal lattice. Graphite is comprised of many layers of graphene stacked atop each other. It is renowned for its exceptional properties, including high electrical conductivity, optical transparency, and immense mechanical strength, making it ideal for next-generation electronics and barrier applications.
Unlike Carbon Nanotubes (1D cylinders) or Fullerenes (0D spheres), graphene is a two-dimensional planar sheet. This 2D geometry allows for large-area surface coverage and unique electronic properties, distinguishing it from particulate or tubular carbon forms often used as additives rather than continuous films.
Chemical Vapor Deposition (CVD) graphene is produced by decomposing carbon-containing gases at high temperatures onto a metal catalyst, typically industrial pure copper sheets. This process yields high-quality, continuous polycrystalline films that can be scaled for industrial applications, offering superior performance compared to exfoliated flakes/graphene powders.
Graphene types include powder materials such as graphene flakes/nanoplatelets (GNPs), graphene oxide (GO), or reduced graphene oxide (rGO), and atomically thin films produced by CVD. While powders are used for composites and inks, CVD films—like those produced by us —are essential for high-performance applications requiring transparency, high conductivity/mobility, and ´true graphene´ properties at atomic thicknesses (< 5 nm) or loading fractions (<0.1% wt).

CVD graphene is a continuous, pristine film with atomic thickness ( typically 1-10 atoms) but macroscopic length and width (meter- to kilometer-scale). CVD graphene is produced by bottom-up synthesis approaches, giving it higher quality and characteristics more closely resembling ‘true’ graphene. CVD graphene suitable for applications requiring transparency and excellent barrier properties at atomic thinness (<5 nm), and high electronic quality. In contrast, Graphene Oxide (GO) and reduced Graphene Oxide (rGO) are typically powders or chemically modified flakes with higher defect densities and lower conductivity, generally used as additives in composites or inks rather than as standalone functional layers. These powders are typically produced by top-down exfoliation of graphite, and are suitable as fillers or thick, opaque coatings.

2D Products and Services

Unlike other graphene which is typically supplied on native copper catalyst, our graphene is provided on a specialized water-soluble sacrificial polymer film. This unique carrier system greatly simplifies the transfer process, allows lamination onto a wider range of substrates, and helps standardize handling to reduce costs and complexity for the end-user.

We offer our WF Series products in standard sizes of 15 x 15 cm and 15 x 28 cm, with customizable layer options ranging from 1 to 5 layers. We also support custom length requirements for larger projects – up to 300 mm widths and meter-scale lengths – enabling scalable integration for both academic research and industrial pilots.
We prepare our multilayered graphene films via a proprietary stacking process of multiple monolayers of CVD graphene. Our standard offerings range from 1-5 layers, but we are able to provide thicker films upon request. Please reach out to us for custom requests.
Our water-soluble carrier platform allows for transfer onto a vast array of substrates, including flexible polymers, silicon, silicon nitride, rigid semiconductors, glass, metals and ceramics. The primary requirement is that the receiving surface must be sufficiently polished, compatible with the water, and the surface energy is amenable to transfer/graphene adhesion after polymer removal. Transfer onto metallic or ceramic surfaces may prove tricky due to potential for graphene-induced galvanic corrosion (for metals) or water intercalation-induced delamination (for ceramics) – please contact us for our alternative solutions for these cases. For water-sensitive surfaces or applications requiring solvent-free polymer removal, please contact us to discuss custom dry-transfer options.
Yes, we have the capabilities to offer a dedicated transfer service in an ISO 7 cleanroom environment using vacuum dry bonding for wafers up to 8 inches in size. While this transfer service is primarily designed for semiconductor and sensing applications, we can also accommodate unique surface requirements on a case-by-case basis.
If your application is sensitive for unsuitable for water, we offer alternative products and solutions for water-free and solvent-free/fully dry removal of polymer. Please reach out to us directly to discuss these specialized methods tailored to your specific material constraints.

We have observed no noticeable degradation for 2-3 years under proper storage conditions, so there is no strict shelf life; however, you can verify quality by checking the sheet resistance, as a noticeable increase suggests damage. Products should be stored in a dark room away from sunlight and moisture and strong lighting, and ideally at 60% humidity, and kept away from metallic or ceramic surfaces that could cause abrasive damage. Avoid storing the films in a manner that will lead to repeated sliding contact of surfaces with the graphene-coated side.

The water-soluble polymer is approximately 30 um thick.

Transfer and Handling

The graphene film appears grey on the polymer film, and can be identified by eye. When shipped, the graphene-coated side of the film is front-facing in the container, identifiable by the side the label or logo attached. We recommend marking this side with a pen immediately after cutting to maintain orientation. If you lose track, you can measure the sheet resistance with a multimeter; the side showing measurable resistance is typically the graphene side.
Yes, for most applications, removing the polymer is essential. The carrier film is electrically insulating and will block the exposed surface of the graphene. Unless your specific application requires a protective top coating and does not need direct electrical contact with the graphene surface, the polymer should be dissolved. The graphene is strongly adhered to the polymer and will peel with it if you attempt to peel the polymer off instead of dissolving it. If water removal is unsuitable for your application, please reach out to us for alternative removal routes.
We advise overnight removal for best results, however the removal rate is dependent on water temperature, the amount of water used, and the size of the polymer to be removed. The removal time can be greatly accelerated by using hot water, stirring, and using generous quantities of water, but these may also accelerate graphene debonding from the surface for some substrates.
Yes, nanometer-scale residues may remain after the transfer process, imparting a mildly hydrophilic character to the surface. To effectively remove these residues, we recommend annealing the sample at 350°C in an Ar/H₂ environment. If high-temperature annealing is not suitable for your substrate, please contact us to discuss alternative cleaning strategies.
Since monolayer graphene is highly transparent, it is often difficult to see with the naked eye. For our multilayered films, often the contrast is sufficiently high to be able to verify the transfer by eye. The most reliable verification methods are Raman spectroscopy (to check structural integrity) or a simple electrical check using a multimeter to confirm surface conductivity. On standard silicon wafers with a 90nm or 285nm oxide layer, graphene may also be visible via optical contrast. Alternatively, one can visualize the graphene on the surface through Scanning electron microscopy (SEM), which provides unequivocal proof of transfer efficacy and continuity of the graphene film.
The graphene film is highly sensitive to mechanical friction and shear stress; rubbing any material forcefully against the surface will damage the graphene. Contact with metallic or ceramic tweezers will also damage the film. We advisehandling the foil only by the edges using polymeric tweezers, avoiding any forceful sliding across the surface.
You should never touch the graphene or the water-soluble polymer with bare hands, as moisture can partially dissolve the water-soluble film and fingerprints will contaminate the surface. Touching the gloves will leave residues on the surface, but will not necessarily damage the graphene unless forcefully rubbed.
In principle, any water should be able to remove the polymer, however using DI water ensures the cleanest transfers with the least amount of residues or contamination.
To get started, you can order standard samples directly from our WF Series range to test compatibility with your process. If you have specific requirements for dimensions, substrates, or transfer services, please contact our team to discuss a custom solution or a pilot project tailored to your application needs.

Our Products

Let’s unlock the full potential of graphene — simply, efficiently, and sustainably.
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WF1L

/
Specifications
  • Monolayer graphene on polymer
  • Graphene on water-soluble sacrificial film
  • 15 cm x 28 cm or 15 cm x 15 cm
  • For applications requiring strictly monolayer graphene
Read more
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