Events

Special Seminar: Morphological and Orientation Characterization of Nanomaterials using TEM
Monday, June 5, 2017
2:00 p.m.-3:00 p.m.
For More Information:
Martha Heil
301 405 0876
mjheil@umd.edu

Special Seminar: Morphological and Orientation Characterization of Nanomaterials using TEM

Location: MSE conference room (1302 Chemical/Nuclear Engineering Building)

June 5 -- 2:00 pm

Dr. Zhi-Quan Liu

Professor, Shenyang National Laboratory for Materials Science

Institute of Metal Research, Chinese Academy of Sciences

Shenyang, China

Transmission electron microscopy (TEM) provides microstructural, phase, and crystallographic information, which is essential for tailoring materials with specific properties.  This talk will focus on the role of precise characterization of Co₃O₄ nanocatalyst surface morphology as well as the grain orientation of nanocrystalline Al in designing materials with specific properties.  Nanoparticles and nanorods of Co₃O₄ nanocatalyst with different properties were investigated using high-resolution transmission electron microscopy.  The Co₃O₄ nanoparticles had a truncated octahedron shape surrounded by eight {111} and six {001} planes, whereas the nanorods predominantly had exposed {110} planes reflecting the presence of active Co³⁺ species at the surface.  Experimental results revealed that the nanorods had extremely high activity and stability for CO oxidation even at -77°C.  The results also demonstrated the importance of morphology control in the preparation of a nanocatalyst.  A non-destructive technique that enables 3D orientation mapping of nanocrystalline Al in TEM will be described.  Compared with the 200 nm spatial resolution of a 3D X-ray microscopy, the superior resolution of this technique (3D-OMiTEM) reaches 1 nm. This technique received the Microscopy Society of America’s 2012 Innovation Award.

This Event is For: Clark School • Graduate • Faculty • Staff • Post-Docs