Rhenium (Re) Nanoparticles, nanodots or nanopowder are brown spherical high surface area metal particles. Nanoscale Rhenium Particles are typically 20 - 100 nanometers (nm) with specific surface area (SSA) in the 1 – 3 m 2 /g range. Nano Rhenium Particles are also available in Ultra high purity and high purity and coated and dispersed forms. Applications for Rhenium nanocrystals include for immunotherapy of solid tumors, in a nucleation layer of palladium and rhenium nanoparticles in-between a nanostructure copper pad surface to create an electrical connection that has superior diffusion barrier and adhesion properties numerous uses in catalysts, in magnetically targeted therapy and as a Magnetic Nanopowder, in polymer membranes to create Active Polymer Membranes and in other coatings, plastics, nanofiber and textiles and in nanowire and other catalysis applications.