scholarly journals Hydrogen-Induced Changes in Palladium Surface Structure: Field Ion Microscopy Study

2008 ◽  
Vol 114 (Supplement) ◽  
pp. S-135-S-140
Author(s):  
A. Tomaszewska ◽  
Z.M. Stępień
Keyword(s):  
Surface Structure ◽  
Microscopy Study ◽  
Field Ion Microscopy ◽  
Palladium Surface ◽  
Ion Microscopy ◽  
Induced Changes

Field-ion microscopy of dilute substitutional solid solutions

1974 ◽  
Vol 339 (1617) ◽  
pp. 223-243 ◽  
Keyword(s):  
Solid Solutions ◽  
Species Recognition ◽  
Alloy System ◽  
Microscopy Study ◽  
Field Ion Microscopy ◽  
Substitutional Solid Solutions ◽  
Ion Microscopy ◽  
Solute Species ◽  
Systematic Field ◽  
Supply Information

A systematic field-ion microscopy study of several iridium-based dilute substitutional solid solutions has been performed. Alloys of iridium with zirconium, tungsten, rhodium, platinum and ruthenium, having solute concentrations of between 0.1 and 5 at. %, have been examined by directscreen methods in order to establish the viability of differentiating atomic species solely by image contrast features arising from their differing response to the field-ionization-evaporation processes. Reliable species recognition in this way allows the structural and crystallographic relations between the solvent and solute species to be determined collectively from careful field-evaporation sequences. A method of manual numerical analysis of micrographs has been developed which allows the salient contrast features from any one alloy system to be deduced. Further, the order of priority of various experimentally observed contrast features has been determined as a function of several parameters. The reliability of such investigations is discussed in terms of both experimental techniques used and the presence of artefact contrast events (e.g. field-induced surface vacancies) created by the technique itself. As a direct means of investigating such structures at the atomic level, it is found that field-ion microscopy can supply information concerning the location of particular species and may also reveal some aspects of the surface electronic state of each atom species with respect to its coordinating surroundings.

Sign in / Sign up

Export Citation Format

Share Document