Creating mixed Fe/Al coatings on planar γ-Al2O3 surfaces

Atomic spectrometry update. Atomic mass spectrometry

“…Combined application of TOF S-SIMS and XPS allowed the Fe concentrations in the upper monolayer and deeper subsurface or bulk to be determined for Al 2 O 3 surfaces which had been hydrated and then immersed in an Fe 3+ solution. 163 Because Al was a common element in the coatings and the bulk, it could be used for normalization of the signal intensities in SIMS to render matrix effects negligible. The Fe concentration was linear with that in the solution but the different slopes obtained for TOF SIMS and XPS showed that an effective enrichment of Fe had occurred at the surface.…”

Imaging of Al/Fe ratios in synthetic Al‐goethite revealed by nanoscale secondary ion mass spectrometry

“…In addition to the visualization of spatial element distributions, NanoSIMS measurements provide element ratios of individual mineral particles from single‐point measurements at a spatial resolution of 50–150 nm . The general usefulness of such an approach has been demonstrated by Conrad et al . and Gabitov et al, who were able to show a correlation between the contribution of the sample material and the respective secondary ion ratio data by investigating iron oxides coated with Al‐foil and carbonates.…”

“…27,28 The general usefulness of such an approach has been demonstrated by Conrad et al. 29 and Gabitov et al, 30 who were able to show a correlation between the contribution of the sample material and the respective secondary ion ratio data by investigating iron oxides coated with Al-foil and carbonates.…”