Manganese (Mn) Nanoparticles, nanodots or nanopowder are spherical or faceted high surface area metal nanostructured particles. Nanoscale Manganese 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.