Size Selected Clusters on Surfaces

Formation, deposition and examination of size selected metal clusters on semiconductor surfaces: An experimental setup

An instrument designed to investigate the chemical behavior of size selected metal clusters on semiconductor surfaces is described. The clusters re formed using laser vaporization, mass selected in a magnetic mass analyzer and deposited on TiO2 substrates under UHV conditions with + + mpact energies ranging from ≤1 to >100 eV/atom. Intensities of mass selected Aun and Agn clusters range from 0....

Fundamental aspects of catalysis on supported metal clusters

In this review, we examine the role of oxide support defects, cluster size-dependence, cluster structural fluxionality, and impurity doping on the catalytic properties of size-selected metal clusters on surfaces. By combining experimental results from the oxidation of CO on sizeselected gold clusters with ab-initio calculations, a detailed picture emerges of the electronic and structural dynami...

Support Interactions and Thermal Stability of Size Selected Clusters Deposited onto Single-Crystal Surfaces

Chemistry of mass-selected Au clusters deposited on sputter-damaged HOPG surfaces : The unique properties of Au8 clusters

Mass-selected Au clusters consisting of less than 10 atoms were deposited on sputter-damaged HOPG surfaces. Oxidation and reduction of the Au clusters were studied using X-ray photoelectron spectroscopy. Only Au8 can be significantly oxidized by oxygen and reduced by CO, and the result is different from those for Au clusters deposited on silica. The chemical properties of mass-selected clusters...

Abstract Submitted for the MAR12 Meeting of The American Physical Society Charge Retention by Monodisperse Gold Clusters on Surfaces Prepared Using Soft Landing of Mass Selected Ions

Submitted for the MAR12 Meeting of The American Physical Society Charge Retention by Monodisperse Gold Clusters on Surfaces Prepared Using Soft Landing of Mass Selected Ions GRANT JOHNSON, Pacific Northwest National Laboratory, THOMAS PRIEST, University of Louisville, JULIA LASKIN, Pacific Northwest National Laboratory — Monodisperse gold clusters have been prepared on surfaces in different cha...