What to know before you buy
If you need to buy graphene powder or CVD graphene films for research, this collection covers both forms. Powders suit composites, battery electrodes and coatings, while monolayer films on copper suit electronics, sensors and membrane studies.
For powders, the MSE PRO high specific surface area graphene powder, about 800 m2/g, is made for lithium-ion battery electrodes. Fluorinated graphene comes in a 200 mg research grade and a 50 g industrial grade. Fluorination makes graphene insulating and more hydrophobic, which suits lubricants, dielectric layers and some battery cathodes.
For films, monolayer graphene on Cu is grown by CVD and comes as standard pieces or 150 mm x 150 mm sheets. The 150 mm monolayer graphene film on Cu with PMMA coating arrives ready for wet transfer to another substrate. Redox.me bottom mount electrochemical cells in 7 mm and 15 mm sizes let you test films and coated samples. For background, read Chemical Vapor Deposition, Graphene Growth.
Frequently Asked Questions
Should I buy graphene powder or graphene film?
Choose powder when graphene will be mixed into something, such as an electrode slurry, polymer composite or ink. Choose a film when you need a continuous single layer, such as for transistors, sensors, transparent electrodes or membrane studies. Films like monolayer graphene on Cu must usually be transferred before use.
What is the PMMA coating on graphene film for?
PMMA supports the graphene layer while the copper is etched away, then you place the film on your target substrate and dissolve the PMMA. A pre-coated sheet saves a spin-coating step. If you plan your own transfer method, the uncoated 150 mm film on Cu foil gives you full control.
When is fluorinated graphene useful?
Fluorination turns conductive graphene into a wide band gap, more hydrophobic material. It is studied as a solid lubricant, dielectric layer and cathode material for primary lithium batteries. The 200 mg research grade suits screening, and the 50 g industrial grade suits larger formulations.
How do I test graphene electrodes electrochemically?
A bottom mount cell clamps a flat sample against an opening of fixed area, so the exposed electrode area stays the same between tests. The Redox.me 15 mm bottom mount electrochemical cell and the 7 mm version suit films, coated foils and pressed samples.
Can I order graphene in larger amounts or a custom size?
Yes. For larger amounts of a listed powder or more film sheets, use the bulk order request form. For a different film size, substrate or powder grade, send your requirements through the quote request form.
