Seminar: Prof Yun Liu - Defect design and formation in solid-state functional materials

Tuesday, 30 May 2017 - 12:00pm – Tuesday, 30 May 2017 - 1:00pm  |  Law G02

Speaker: Prof Yun Liu

Ionic doping and/or substitution in solid-state materials provide opportunities to modify the materials for the peak performance and to create novel materials with new functions. 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 physical properties, and thus proposing new strategy to design the materials with high performance and new functions.

Prof Yun Liu received her PhD degree from the Xian Jiaotong University in 1997. She has since held the AIST fellow and STA Fellow positions at the National Institute of Advanced Industrial Science and Technology (AIST), Kyushu, Japan (1998-2001) before the commencement of her Postdoctoral Fellow position at the Australian National University in 2001. She is currently leading the Functional Materials Research Group at the Australian National University. She is also the Director of ANU-Fenghua Joint R&D Centre for Dielectric Materials.

In Australia, she was awarded the Australian Research Council (ARC) Queen Elisabeth II (2006-2010) and ARC Future Fellow (2011-2016). She is a fellow of the Australian Institute of Physics (FAIP). She is a national board member and a Certified Materials Professional (CMatP) of the Materials of Australia (MA). She is also a member of the Society of Crystallographers in Australia and New Zealand (SCANZ) and the Society of Australian Ceramics as well as IEEE.

Her research will cover one or more aspects as follows:  (1) Material synthesis and design (2) Local structure and defect analysis (3) Functionality characterisation from nanometre to centimetre length scale, in particular related to dielectric, piezoelectric and ferroelectric properties, photocatlystic and photovoltaic effects as well as energy storage; And (4) Device fabrication. CI Liu have published over 200 peer-reviewed journal papers and 24 patents issued, including papers published in Nature Materials, Advanced Materials, Advanced Functional Materials and Chemistry of Materials.