TY  - JOUR
AU  - Forbes, B. D.
AU  - Houben, L.
AU  - Mayer, J.
AU  - Dunin-Borkowski, Rafal
AU  - Allen, L. J.
TI  - Elemental mapping in achromatic atomic-resolution energy-filtered transmission electron microscopy
JO  - Ultramicroscopy
VL  - 147
SN  - 0304-3991
CY  - Amsterdam
PB  - Elsevier Science
M1  - FZJ-2015-02597
SP  - 98 - 105
PY  - 2014
AB  - We present atomic-resolution energy-filtered transmission electron microscopy (EFTEM) images obtained with the chromatic-aberration-corrected FEI Titan PICO at the Ernst-Ruska Centre, Jülich, Germany. We find qualitative agreement between experiment and simulation for the background-subtracted EFTEM images of the Ti–L2,3 and O–K edges for a specimen of SrTiO3 oriented down the [110] zone axis. The simulations utilize the transition potential formulation for inelastic scattering, which permits a detailed investigation of contributions to the EFTEM image. We find that energy-filtered images of the Ti–L2,3 and O–K edges are lattice images and that the background-subtracted core-loss maps may not be directly interpretable as elemental maps. Simulations show that this is a result of preservation of elastic contrast, whereby the qualitative details of the image are determined primarily by elastic, coherent scattering. We show that this effect places a constraint on the range of specimen thicknesses which could theoretically yield directly useful elemental maps. In general, interpretation of EFTEM images is ideally accompanied by detailed simulations.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000343157400011
DO  - DOI:10.1016/j.ultramic.2014.07.002
UR  - https://juser.fz-juelich.de/record/189430
ER  -