報告題目：Local structure analysis in polar functional materials
內容簡介：Ionic doping and/or substitution in polar functional materials provide opportunities to tune the polarization for the peak performance or to create new polarization behaviors. In the past, the research in this field mainly focuses on the development of the relationship between the macroscopic structures (e.g. average structure determined by X-ray powder diffraction) and properties. It is found, however, that in many cases, such a relationship becomes very complicated and cannot be properly built. This is because that in a strongly correlated solid-state system, these ions can be structurally and/or chemically accommodated differently in local region but do not change the average structure. The trend that such ionic doping and/or substitution influence the properties is often not straightforward. In this talk, I will use several examples to demonstrate the local consequence of ionic doping and/or substitution and their impact on polarization property, and thus drawing your attention on the material design for high performance and new functions..
Microscopy specialist，Centre for Advanced Microscopy, Australian National University
Dr Hua Chen received his Bachelor and Master degrees from the Xian Jiaotong University in the field of microelectronic technology and structural materials, and PhD degree from the Australian National University in nanomaterials and nanotechnology. He worked in China, Belgium, Japan and Australia as Lecturer/Associate Professor and National Research Fellows. He became a physical microscopy specialist since 2009 at the Centre for Advanced Microscopy, the Australian National University, providing support, training and service to researchers in materials science and engineering, nanomaterials and nanotechnology, and biology where the electron microscopic techniques are used as research tools. He has published 82 papers, including Nature Materials, Advanced Materials, and Plant Physiology.