A composition of matter, includes a plurality of anisotropic nanoparticles that are in physical contact with one another, each of the plurality of anisotropic nanoparticles having a) a first dimension that is substantially different than both a second dimension and a third dimension and b) a non-random...http://www.google.es/patents/US8034317?utm_source=gb-gplus-sharePatente US8034317 - Assemblies of anisotropic nanoparticles
