Webinar

Watch this webinar to learn how to best optimize the Thermo Scientific Spectra (S)TEM, with its ultra-high-brightness cold-FEG source (X-CFEG), for EELS data collection, especially in the case of a very large collection angle and/or short camera length, where the optics quality becomes very important.

Acquiring high-quality EELS data on a STEM microscope has always been quite challenging, especially for beginners. Unlike EDS, there are some additional steps required to set up both the microscope and the EELS spectrometer properly. The quality of the post-specimen optics is very important to ensure the correct acquisition of the highest-quality EELS data, especially in the case of large collection angles.

As an example, the figures below show atomic EELS maps from STO using the Ti K at 5 keV and Sr L at 2 keV acquired with a 130 mrad collection angle at 200 kV and a 70 pm probe size. The same exact microscope installation can achieve 0.23 eV energy resolution at 200 kV, which is outstanding for a cold-FEG (S)TEM.

ELLS
Presenters
Paolo Longo

Paolo Longo, Director of Product Marketing, HETEM, Thermo Fisher Scientific

Paolo Longo joined Thermo Fisher Scientific in June 2021 after spending more than 10 years at Gatan Inc., in various applications-based roles supporting analytical products. While at Gatan and previously during his PhD and Postdoc, Paolo mastered an extensive practical and technical knowledge of EELS and related techniques with various microscope manufacturers. Paolo is very well known in the EELS and microscope community, having contributed to multiple conferences and supported many users with trainings, workshops, and EELS schools. Paolo received his PhD in Physics (2008) from the University of Glasgow, UK.
Christian Maunders

Christian Maunders, Product Marketing Manager, Spectra (S)TEM, Thermo Fisher Scientific

Christian Maunders joined Thermo Fisher Scientific in 2011 as a Field Service Engineer after completing post-doctorate studies in both Canada and Australia. His research was focused on the development of quantitative aberration-corrected STEM and the characterization of complex oxides with high-resolution EELS. Since joining Thermo Fisher Scientific, Christian has been the Product Marketing Manager for the Themis and Spectra (S)TEMs. Christian received his PhD in Materials Science (2004) from Monash University, Australia.

Runtime: 60 minutes

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