Palladium nano-clusters grown on prestructured HOPG substrates Z. Yuan, R. Stephan, M.C. Hanf, J.M. Becht, C. Le Drian, M. Hugentobler, W. Harbich and P. Wetzel Eur. Phys. J. D, 63 3 (2011) 401-406 Published online: 28 June 2011 DOI: 10.1140/epjd/e2011-20126-0