Abstract
The aberration corrected scanning transmission electron microscope (STEM) is a powerful tool for nanoscale characterization, as it is capable of imaging structures with sub-angstrom resolution. An optical microscope uses visible light to magnify objects, which is limited to ~1000X due to the limited resolving power of light. Here, we applied STEM simulations via PRISMATIC and PY4DSTEM, in order to compute images of crystals, 2D materials, and metallic glasses. Practically, computational simulations are important due to the operating cost of STEM and time required to be trained on the equipment. More importantly, simulations provide a direct comparison between theory and experimental results. It assumes ideal crystal formation, with no defects, thus producing an easily interpretable image. In addition, Pair Distribution Function (PDF) algorithm of DiffPY-CMI are employed in order to probe into S/MRO of amorphous materials.
Document Type
Final Report
Class Name
Mechanical Engineering and Material Sciences Independent Study
Language
English (en)
Date of Submission
12-19-2025
Recommended Citation
Yang, Yang and Vargas, Francisco Lagunas, "STEM and PDF Simulation of crystalline and amorphous materials" (2025). Mechanical Engineering and Materials Science Independent Study. 312.
https://openscholarship.wustl.edu/mems500/312