Optical and photoelectron spectroscopic studies of alkyl-passivated silicon nanoparticles A. Tanaka, R. Saito, T. Kamikake, M. Imamura and H. Yasuda Eur. Phys. J. D, 43 1-3 (2007) 229-232 Published online: 24 May 2007 DOI: 10.1140/epjd/e2007-00103-0