Paolo Longo, Ph.D., Gatan, Inc. Sample courtesy of Professor Gianluigi Botton at CCEM, Hamilton, ON, Canada Microscope courtesy of CCEM, Hamilton, ON, Canada Acknowledgement to Dr. Andreas Korinek at CCEM for helping set up microscope for experiment.
EELS color map of a Pt/Au catalyst nanoparticle
EELS data taken using a probe and image-corrected FEI Titan TEM/STEM microscope equipped with X-FEG emission gun and a fully loaded GIF Quantum® ERS system. Au M4,5-edges at 2206 eV (red) and Pt M4,5-edges at 2206 eV (red).
Voltage: 200 kV; data taken in STEM mode; EELS core-loss spectrum (1400 – 3400 eV) exposure time: 20 ms; convergence angle: 19 mrad; collection angle: 34 mrad; beam current: 180 pA; total exposure time: <5 min