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Element Specific Molecular Scale XAFS Structural Approach in Material Science
					
 Jul 23, 2024 
 2:30PM to 3:30PM

									

				

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	Date/Time

	Date(s) - 23/07/2024
2:30 pm - 3:30 pm





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Dr. Ning Chen


Canadian Light Source


 


The Canadian Light Source (CLS) is Canada’s national and international centre for synchrotron science and its applications. With its 20 operation beamlines, CLS provides synchrotron radiation from infrared to hard X-rays, making extensive range of unique research capabilities available.  X-ray absorption  spectroscopy (XAS), as one of the most extensively applied synchrotron techniques, plays its unique role in the research upon energy, material, chemistry and chemical engineering, and geoscience. Its Nano to sub Nano scale element specific local structure detecting capability possess a spatial resolution of ~0.02Å in scale, making molecular level element specific structural characterization possible for both crystalline and amorphous systems. In this BIMR talk, multiple disciplinary capabilities at CLS, e.g., XRD, imagining, and IR, will be introduced. Especially XAS will be reviewed upon its uniqueness of site-by-site, shell-by-shell, and bond-by-bond sensitivities, and of its application in structural stacking, surface complex probing, Nano to sub Nano scale of particles size estimation, and certain wet chemistry process, e.g., desulfation and sulfation. What will be also discussed is the XAS roadmap and corresponding full-scale user support and collaboration available at HXMA, CLS.  


 


Speaker bio:


Dr. Ning Chen obtained his Ph.D. in 2002 at Department of Geological Sciences, University of Saskatchewan, and has worked at Canadian Light Source (CLS) since 2001. At CLS, he involved in the design and construction of the very first hard X-ray XAS facility (HXMA) in Canadian, and has been in charge of its commissioning and user program afterwards. At CLS, Ning has been committed to develop HXMA as a leading synchrotron XAS research center in Canada, and to promote XAS in Canada and internationally. To facilitate users’ research effectively and efficiently proceed, a hypothesis-driven and theoretical modeling guided XAFS roadmap has been developed and promoted throughout the user community. To fulfill his user community development and HQP training effort, Ning holds seven adjunct faculty appointments at six Canadian Universities, including Chemical Engineering, McMaster University. With 24 years of experience, Ning’s expertise is XAS and its application, and represents Americas as an Executive Committee Member in International X-ray Absorption Society (IXAS).


 


 


In-Person only: ABB 102