Imaging and tunneling spectroscopy of gold nanocrystals and nanocrystal arrays T. P. Bigioni, L. E. Harrell, W. G. Cullen, D. K. Guthrie, R. L. Whetten and P. N. First Eur. Phys. J. D, 6 3 (1999) 355 Published online: 15 June 1999 DOI: 10.1007/s100530050319