Determination of the particle size required for bulk metallic properties

Abstract

Small transition-metal clusters have been prepared by vacuum deposition and characterized by transmission electron microscopy. The valence bandwidth has been measured by x-ray photoelectron spectroscopy (XPS) and compared with the theoretical prediction of extended Hückel and self-consistent-field Xα scattered-wave molecular-orbital calculations. The semiempirical extended Hückel calculations agree much better with the experimentally determined values.