“Lab in the gap” - the UA’s new Electron Microscope is ready for solving big scientific problems

An electron microscope uses electrons to probe an object, measuring the physical, chemical and microstructural information down to atomic-level resolution. Recently, there are transformative advancements in electron microscopy: 1) stable, easy-to-use automated aberration correction enables 80pm-resolution instrument for solving real-world problems; and 2) a surge of new development of in situ and environmental techniques. Using microelectromechanical systems (MEMS) technology with a high level of integration and miniaturization, we are developing methods that enable us to study the material of interest immersed in liquid or gas, under thermal, mechanical or electrical influence, and simultaneously acquire multiple responses and signals in situ. The emerging new electron microscopes are no longer merely used for observational purposes, but can be fitted to serve as a “lab in the gap” for solving big scientific problems of biology, chemical engineering, environmental science, materials science, mechanical engineering, physics, and beyond.
 
The University of Arizona’s new aberration-corrected Hitachi HF5000 TEM/STEM is equipped with a secondary electron detector, which can reveal the surface features via secondary electron (SE) imaging, while simultaneously probe the clusters through its entire thickness (bulk) with transmitted electrons. This ability is advantageous in studying catalysts, nano material and devices, because it permits the selective visualization of bulk atoms and surface ones, beyond a traditional two-dimensional projection in TEM. Dr. Howe will give three examples of research problems and using this presentation to inspire cutting-edge research projects from researchers in chemistry and biology.
 
Nanoparticles
Core-shell nanoparticles for drug delivery. Simultaneous imaging reveal the porous silica shell and the single-crystalline gold rod core.
 
“Lab in the gap” - The UA’s New Electron Microscope is ready for solving big scientific problems
Date/time: Thursday, May 11th, 4:00 pm
Location: Koffler 218
Speaker: Jane Y. Howe, Ph.D., Hitachi High-Technologies America Inc., jane.howe@hitachi-hta.com, 510.634.0249
 
Bio sketch:
Jane Howe is a Senior Applications Scientist with Hitachi High-Technologies America Inc. She is currently a Visiting Scientist working with the Lunar and Planetary Laboratory at University of Arizona. Prior to joining Hitachi, Jane worked in the Microscopy group of Oak Ridge National Laboratory for nine years as a Staff Scientist and a Principal Investigator. Jane has fifteen years of experience in electron microscopy of energy materials. She has over 90 publications on peer-reviewed journals and holds seven US patents. She won two R&D 100 Awards in research and development of the lithium battery and carbon materials. Jane’s research interest is in solving the materials problems via in situ and correlative microscopy techniques.
 
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