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Evidence for a Size‐Selective Adsorption Mechanism on Oxide Surfaces: Pd and Au atoms on SiO 2 /Mo(112)
Author(s) -
Ulrich Stefan,
Nilius Niklas,
Freund HansJoachim,
Martinez Umberto,
Giordano Livia,
Pacchioni Gianfranco
Publication year - 2008
Publication title -
chemphyschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.016
H-Index - 140
eISSN - 1439-7641
pISSN - 1439-4235
DOI - 10.1002/cphc.200800153
Subject(s) - adsorption , oxide , metal , nanopore , penetration (warfare) , atom (system on chip) , materials science , crystallography , chemical physics , chemistry , nanotechnology , organic chemistry , engineering , operations research , computer science , embedded system
Sieving single atoms: The binding of single metal atoms to thin SiO 2 films grown on Mo(112) depends on the size of the adatom. While Pd atoms are able to pass the nanopores in the silica network (see figure) and strongly bind to the Mo–SiO 2 interface, Au atoms are too big for a penetration and interact only with line defects in the oxide surface.