Nanocrystalline gold in Au-doped thin C-60 films

Thin Au-C-60 films with global composition AuxC100-x (x between 0.35 and 4. 50 at.%) were prepared by vacuum co-deposition and investigated by X-I ay d iffraction, EDS, XTEM and electrical transport. Evidence indicated the form ation of distorted nanocrystalline Au, presumably stabilized by interface e lectron transfer into C-60 LUMO. Electrical results are interpreted in the frame of the dominant current model, with a continuous density of localized states induced by Au in the C60 gap. There is also evidence for variable r ange hopping at low temperatures. (C) 1998 Elsevier Science S.A. All rights reserved.