3D-reconstruction of chemical state distributions in stratified samples by spatially resolved micro-X-ray resonant Raman spectroscopy

Abstract

X-ray resonant Raman scattering was used, for the first time, in a confocal setup with the aim of determining different compounds of the same element in a copper-multilayer sample. This allowed us to resolve chemical environments with 3D-resolution using a detection system with low energy resolution. A stratified Cu-oxide-sample was studied in the Brazilian Synchrotron Light Laboratory (LNLS) using monochromatic radiation and an Energy Dispersive System (EDS) setup. The results are relevant since they allowed observing the presence of different oxide-layers, impossible to discriminate with conventional geometries of irradiation. They also permit the characterization of a compound present at a particular depth of the sample with micrometer resolution using a low-resolution system.