Speakers

Yuzi Liu, PhD

Center for Nanoscale Materials Argonne National Laboratory

Time

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Address

3041 ERF

Description

Abstract:
In situ analytical transmission electron microscopy (TEM) is a powerful platform to study materials transformation and function-microstructure relationship of devices at high spatial resolution. It provides the indispensable insights for the design and fabrication of the functional materials/devices and understanding of the materials transition mechanism. I will present the results of the application of in situ nano biasing in TEM to study the barrier evolution of magnetic tunnel junctions by off-axis electron holography, the switching mechanism of NiOx based memristor, and lithium dendrite growth in Li ion batteries. In addition, the in situ liquid TEM study of self-assembly of charged nanoparticle driven by electron beam irradiation and external current will be discussed. I will also present the in situ TEM investigation of phase transition of AgCl nanoparticle to AgOx at low pressure (in TEM column) and atmosphere (gas flow TEM). Finally, the sintering of metal nanoparticles by electron beam irradiation will be presented to demonstrate the beam effect.



Bio:

Dr. Yuzi Liu obtained his Ph.D. degree in condensed matter physics from Institute of Physics, Chinese Academy of Sciences in 2007. Then he worked with Dr. Z. L Wang as a postdoc at Georgia Institute of Technology and DOE Ames Laboratory until March 2008. After that, he moved to Argonne National Laboratory to continue his career until now. At the beginning, he worked as a postdoc with Dr. Amanda Petford-Long in Materials Science Division for 3 years. Then, he was hired as an assistant scientist in Center for Nanoscale Materials. A couple of month ago, he was promoted as a scientist.
Dr. Liu has authored/co-authored about 80 peer reviewed publications for the study of materials’ microstructure-properties relationship by using in situ and ex situ TEM. He has given invited talks at ICMAT2015 and Argonne Users meetings and talks at MRS meetings and Microscopy & Microanalysis Conferences etc..
Dr. Liu likes to serve the research communities. He organized symposia at MRS Meetings and APS/CNM users meetings.

For more information, please contact Prof. Reza Shahbazian-Yassar

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