A truncated icosahedral structure observed in gold nanoparticles

In the present work we describe a new type of gold nanoparticle. The partic le shape corresponds to a truncated icosahedron which in some orientations appears as an asymmetric decahedron. The particle structure is discussed an d the corresponding high resolution electron microscopy images are calculat ed for the optimum defocusing condition in several orientations, Experiment al images of gold nanoparticles are shown that corroborate the truncated ic osahedron structure. The evidence suggest that indeed this particle is form ed in experimental growth conditions in which the equilibrium shape is achi eved. (C) 2000 Elsevier Science B.V. All rights reserved.