Monolayer Graphene on Cu with PMMA Coating
Monolayer Graphene on Cu with PMMA Coating - Processed in Clean Room Class 1000
A single-layer graphene film on a copper substrate. This product is provided with a PMMA coating on top of the Graphene in order ease the transfer process and to avoid contamination. It's a high quality product, with a great homogeneity, and it is ideal for R&D departments and universities.
- · Growth method: CVD synthesis
- · Appearance (color): Transparent
- · Transparency: > 97%
- · Coverage: > 98%
- · Number of graphene layers: 1
- · Thickness (theoretical): 0.345 nm
- · FET Electron Mobility on Al2O3 passivated SiO2/Si: 6900 cm2 /Vs (doi: http://dx.doi.org/10.1063/1.4972847)
- · FET Electron Mobility on SiO2/Si: 3760 cm2/Vs DOI: https://doi.org/10.1103/PhysRevLett.119.066802
- · Sheet Resistance on SiO2/Si: 450±40 Ohms/sq (1cm x1cm)
- · Grain size: Up to 20 μm
Substrate Cu Foil
- · Thickness: 18 μm
- · Roughness: around 80 nm
- · Pretreated for easier bottom layer removal: Monolayer graphene on the back side of Copper is partially removed, but not completely, so an additional treatment like RIE is needed before transfer to eliminate the bottom layer totally
- · Spin coated for high homogeneity
- · Thickness: 60 nm
- · PMMA model: 495K, A2
Flexible batteries, Electronics, Aerospace industry, MEMS and NEMS, Microactuators, Conductive coatings, Research
“Ultrathin rechargeable all-solid-state batteries based on monolayer graphene”, J. Mater. Chem. A, 2013,1, 3177-3181 DOI:10.1039/C3TA01183F
“Fabrication and Electrochemical Characterization of Single and Multi-Layer Graphene Anodes for Lithium-Ion Batteries”, J. electrochem. Soc. 2012, vol. 159, issue 6, A752 – A761
Frequently Asked Questions
A: Graphene is transferred via a wet transfer process. Before etching the copper away, the graphene is protected with a sacrificial polymethyl methacrylate (PMMA) layer. A ferric chloride solution is then used for Cu etching. Once the etching is complete, the graphene is washed and transferred onto the desired substrate. Finally, the PMMA layer is removed.
A: The PMMA can be removed using organic solvents or thermal treatment. Our standard process removes the PMMA with solvents. Using acetone and IPA baths, the sample is submerged for 30min in each one, then dried with a N2 gun. Use of an ultrasonic bath should be avoided in order to prevent detachment of the graphene film.
Thermal treatment up to 450ºC in inert atmosphere leaves fewer residues. In this case the Raman spectrum is modified due to some strain induced during the treatment and polymer polymerization. However, the electrical properties of the graphene remain intact.
A: The thickness is around 60nm.
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