Prof. Ning Chen [Canadian Light Source, Canada]

Title: Opportunities for Research at the Canadian Light Source   XAS: A Molecular Scale Approach

Time: 10:30 - 11:30 AM, Monday, October 22, 2018

Place: Conference room C206, HPSTAR (Beijing)

Host: Huiyang Gou

Polycom: 02120001

Abstract:

The Canadian Light Source (CLS) is Canada’s national and international centre for synchrotron science and its applications. It is a third generation synchrotron providing synchrotron radiation from 0.62 meV in the far- infrared to 100 keV hard X-rays. There are currently 14 operational beamlines, with another 2 being commissioning, and 8 under construction. That permits research in material science, physics, chemistry, biological sciences, protein crystallography, medical and life sciences, environmental science, earth and geological sciences.

As one of the most extensively applied synchrotron techniques, X-ray absorption  spectroscopy (XAS) plays its unique role in many scientific areas. Its element specific local structure probing capability makes molecular level understanding for both crystalline and amorphous systems possible. This presentation will first present XAS facilities and capabilities specific to the Hard X-ray MicroAnalysis (HXMA) beamline at CLS, which is a wiggler-sourced hard X-ray beamline with an energy coverage of 5–40 keV. The presentation will further focus on theoretical XANES modeling guided XAS applications in local structural probing in Nano to sub-Nano scale, including Nano to sub-Nano particle size estimation, bonding specific local structural distortion for first shell coordination, and speciation of surface and surface imbedded complex and their local structural environment and chemistry.

Biography of the Speaker:

2003/09-Now: BL Responsible and Senior Staff Scientist in Canadian Light Source, Canada;

2018/06-2023/06: Adjunct Professor in University of Saskatchewan, Canada;

2017/10-Now: Guest Professor in QingDao University, China;

2016/03-2019/02: Adjunct Professor in

2014/10-2019/10: Adjunct Professor in Peking University, China;

2003/10-2023/06: Adjunct Professor in University of Saskatchewan, Canada;

2001/08-2003/08: Post-Doctoral Fellow/Cogema Research Associate in Canadian Light Source and University of Saskatchewan, Canada;

2002/05: Doctorate, Geological Sciences, University of Saskatchewan, Canada;