Figure 6
(a) TXM-micrographs of the spherical particles after printing and direct exposure to H2S at 200 °C (overlay 930.8 eV (red), 931.4 eV (green), 932.3 eV (blue)). The false color representation is used as a tool here in order to visualize the chemical inhomogeneity of the sample. Each color corresponds to a particular type of chemical bond. This information is extracted from the spectrum of each pixel of the image. (b) NEXAFS spectra of the O-K-edge and the Cu-L2,3-edge of the marked particles in (a) are represented in green, red and blue and are labeled 1, 2 and 3, respectively. For comparison, the spectrum of an exemplary octahedron particle under similar experimental conditions is depicted as well. The arrows in (b) indicate the location of peaks and photon energies used to characterize the different chemical species in (a).
