Featured Publications & Research Highlights using the UC San Diego NE-MRC
We are hoping to grow this page into a periodically rotating showcase of the research and researchers from various different fields that have used the UC San Diego NanoEngineering Materials Research Center (NE-MRC). If you have used the NE-MRC for your research and would like to have your research featured here (and on the respective instrument page) please contact us!
NanoEngineering / Chemical Engineering / Materials Engineering
Identifying molecular structure is a crucial step in the analysis of proteins, pharmaceuticals, geology, and materials science because crystal structure often plays an important role in the properties exhibited. Electron diffraction is one of the most common methods of structure analysis in each of these fields. One of the major challenges within the world of electron diffraction is analysis of the collected diffraction patterns.
Kevin Kaufmann et al. have developed a computer algorithm that independently analyzes diffraction patterns utilizing the same type of deep learning (a subset of artificial intelligence and machine learning) algorithm as is applied in facial recognition and self-driving cars. In this work, they demonstrate the method using a scanning electron microscope (SEM) to collect electron backscatter diffraction (EBSD) patterns.
A modern EBSD system enables determination of fine-scale grain structures, crystal orientations, relative residual stress/strain, and other information. The drawback of commercial EBSD systems is the software’s inability to determine the atomic structure of the crystalline lattices present within the material being analyzed. Using the newly designed method, the deep neural network independently analyzes each diffraction pattern to determine the lattice, out of all possible lattice structure types, with a high degree of accuracy.
Link to article: https://science.sciencemag.org/content/367/6477/564.full
Full citation: Kevin Kaufmann, Chaoyi Zhu, Alexander S. Rosengarten, Daniel Maryanovsky, Tyler J. Harrington, Eduardo Marin, and Kenneth S. Vecchio, “Crystal symmetry determination in electron diffraction using machine learning” Science, 2020, 367, 564-568.
Kevin Kaufmann is a fifth year PhD Candidate in NanoEngineering under the guidance of Dr. Kenneth Vecchio at UC San Diego, where he also completed his Bachelors and Masters degrees. His doctoral studies are focused on the application of data science, machine learning, and artificial intelligence to solve materials science problems. He is currently involved in the development of a suite of tools for accelerating each step in the material development process from design to analysis. Kevin’s interest in these topics developed from an interest in data-driven materials science and the opportunity to streamline the material discovery loop.