Nano Particle Standard 

  NIST RM 8012 (30nm Au)
  NIST RM 8013 (60nm Au)
  Au       Nanoparticles Aqueous Dispersion, 20 nm 
  Al2O3  Nanoparticles Aqueous Dispersion, 20 wt %, 10 nm 
  Al2O3  Nanoparticles Aqueous Dispersion, Gamma, 20 wt %, 20 nm 
  Al2O3  Nanoparticles Aqueous Dispersion, Gamma, 20 wt %, 30 nm
  Al2O3  Nanoparticles Aqueous Dispersion, 20 wt %, 30-60 nm
  SiO2    Nanoparticles Aqueous Dispersion, 20 nm 
  SiO2     Nanoparticles Aqueous Dispersion, 50 nm
  SiO2    Nanoparticles Aqueous Dispersion, 80 nm
  Fe3O4  Nanoparticles Aqueous Dispersion, 20 nm 
  Ag       Nanoparticles Aqueous Dispersion, 20 nm