Corresponding maps of a smaller area ('Pos1.1', indicated by a dashed whit box) derived from STEMEDS for Cu. The colour code refers to the atomic concentrations in at.% in case of the EDS analysis and to the density (in ng cm 2 ) in case of the nano-XRF analysis, ranging from the corresponding minimum (Min) to the maximum (Max) values. The scale bar is valid for all images.
