Instructors: Colin Ophus, Lawrence Berkeley National Laboratory; Yao Yang, Cornell University; Steven Zeltmann, Cornell University; Stephanie Ribet, Northwestern University
With the introduction of extremely high speed direct electron detectors, a full image of the diffracted electron probe at each position can be collected, producing a four-dimensional dataset (a 4D-STEM experiment). The overall objectives of this tutorial
is for researchers, who are not familiar with this technique, to be able to conduct the experiments, process/analyze the data, and utilize the technique to their research. Specifically, the researchers will learn the fundamental principles of 4D-STEM,
experimental procedures, factors that affect the accuracy of the results, data processing, simulation methods, challenges, and opportunities created by 4D-STEM.
Tutorial Schedule
8:00 am
Introduction and Set Up
8:30 am
Fundamental Principles of 4D-STEM
Colin Ophus; Lawrence Berkeley National Laboratory, United States
9:45 am
Break
10:15 am
Using py4DSTEM to Measure Orientation and Strain Maps of Crystalline Samples
Colin Ophus; Lawrence Berkeley National Laboratory, United States; Steven Zeltmann; Cornell University, United States
12:00 pm
Lunch
1:30 pm
Using py4DSTEM for Phase Contrast Imaging in 4DSTEM
Colin Ophus; Lawrence Berkeley National Laboratory, United States; Stephanie Ribet; Northwestern University, United States
3:00 pm
Break
3:30 pm
Using py4DSTEM to Simulate Kinematical and Dynamical Diffraction and Application for Beam Sensitive Materials
Colin Ophus; Lawrence Berkeley National Laboratory, United States; Stephanie Ribet; Northwestern University, United States
4:30 pm
Operando Electrochemical 4D-STEM at Energy Materials Interfaces
Yao Yang; Cornell University, United States