... nm, sizes are hundreds of nm - several µm, excellent solubility in water and DMF, etc, metallic content < 10ppm, not soluble ... preparation of photoelectric devices. SGraphene—030Name: Single layer of Graphene solution, Features: Concentration is 1mg/ml, thickness is 07-1.2nm ... , 2-4 nm thick , hundreds of nm-dozens of µ m in size, solid powder, > 99% purity, good electrical conductivity, excellent ...