Antimony Tin Oxide (ATO) Nanoparticles, nanopowder, nanodots or nanocrystals are spherical or faceted high surface area nanocrystalline alloy particles with magnetic properties. Nanoscale Antimony Tin Oxide (ATO) Particles are typically 20-40 nanometers (nm) with specific surface area (SSA) in the 30 - 50 m2/g range and also available with an average particle size of 100 nm range with a specific surface area of approximately 7 m2/g.