... sizes are hundreds of nm - several µm, excellent solubility in water and DMF, etc, metallic content < 10ppm, not soluble impurities ... of photoelectric devices. SGraphene—030Name: Single layer of Graphene solution, Features: Concentration is 1mg/ml, thickness is 07-1 ... layers, hundreds of nm - several µm, excellent solubility in water and DMF,etc. Metallic content <10ppm, not soluble impurities < ...