Small Scale Graphene oxide powder

Small Scale Graphene oxide powder; Making method: improved hummers; Purity: >99%; pH: 5-7; Single rate: >99%; Thickess: 0.335-1.2nm; Diameter: 100-300nm; Mn Content: <100ppm; Layers: 1-2; Specific Surface Area: 1000-1217m2/g; black or brown powder