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APMS Colloquium

Thursday, October 24, 9:45-10:45 am

Dr. John Watt
Los Alamos National Laboratory

Controlling and Investigating Materials and their Interfaces with In-situ and Cryogenic Electron Microscopy

Abstract: Advances in cryogenic electron microscopy (cryo-EM), primarily driven by the life sciences, have emerged as powerful techniques for the characterization of beam and air sensitive materials. Cryo-EM avoids the drying artifacts introduced when preparing a sample for the high vacuum environment of an electron microscope, and significantly reduces e^- beam damage. Therefore, materials can be imaged as close to their native hydrated (or solvated) state as possible, while avoiding unwanted transformations (e.g., oxidation). In this talk I discuss how cryo-EM, and in particular focused ion beam (FIB) lift out techniques are being used for the analysis of low-Z metals, biomimetic materials, polymers, nanocomposites, and their liquid-solid interfaces. I will present the workflow and logistics of using the Center for Integrated Nanotechnologies (CINTs) cryo-EM lab, and the unique challenges involved with performing this method at cryogenic temperatures.

Dr. John Watt is a Scientist and electron microscopist at the Center for Integrated Nanotechnologies (CINT) at Los Alamos National Laboratory. He received his PhD in Chemistry from Victoria University of Wellington, New Zealand and held postdoctoral positions at both VUW and CINT Sandia. His research interests include the synthesis and characterization of soft matter and inorganic materials and investigating their unique interfaces and behaviors using both cryo- and in-situ EM.

Adel Mathematics Building, Rm 147 or on Zoom (see below)

Meeting ID: 832 5521 7941
Password: 29013

Sponsored by:

• Center for Materials Interfaces in Research and Applications (¡MIRA!)
• Nanotechnology Collaborative Infrastructure Southwest (NCI-SW) and Arizona State University (ASU)

For more information please contact APMS at APMS@nau.edu