Methods
probe-corrected FEI Titan TEM/STEM microscope
X-FEG emission gun
GIF Quantum® ERS system
four quadrant SDD EDS detectors (FEI Chemistem)
Ti (green); Sr (red)
voltage: 200 kV
data taken in STEM mode
EELS low core-loss spectrum (300 – 2300 eV): 10 ms
dataset size: 70 x 57 pixels
beam current: 200 pA