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Each batch of nanoparticles is extensively characterized using techniques including SEM or TEM, XRD, COA, etc. In addition to ensuring that every batch of nanoparticles meets our stringent quality control requirements, customers are provided with batch-specific specification sheets containing representative SEM/TEM images,Coatings,dispersions, and solution pH. monodisperse nano au, Oh Functioned Carbon Nanotubes Powder , 70nm Tungsten Nanoparticles , Nano Silica Powder , Customized & ISO certified & Factory prices & Worldwide shipping.