Morphological studies of nanostructures from directed cluster beam deposition J. B. Chen, J. F. Zhou, A. Häfele, C. R. Yin, W. Kronmüller, M. Han and H. Haberland Eur. Phys. J. D, 34 1-3 (2005) 251-254 Published online: 13 July 2005 DOI: 10.1140/epjd/e2005-00153-2