Seminar ''Introduction of XAFS and its applications'' Prof. Sang-Wook Han, Jeonbuk National University


Friday, May 1, 2015 - 13:30 to 14:30


Meeting Room C015, Lab1


Date:   Friday, May 1, 2015
Time:   13:30-14:30
Venue:  C015, Lab1


Prof. Sang-Wook Han
Department of Physics Education, Jeonbuk National University
Jeonju, Republic of Korea


Introduction of XAFS and its applications


X-ray absorption fine structure (XAFS) is a unique tool to detect local structural and chemical properties of a selected species in compound materials. XAFS includes X-ray absorption near edge structure (XANES) and extended XAFS (EXAFS). XANES can detect the chemical valance states and local density of states of selected ions in a material, meanwhile EAFS can describe local structural properties including bond lengths, bond length disorders, coordination numbers, and species of neighboring atoms around a probing atom. XAFS can be applied to a solid, liquid, and even gas with no mater of its crystallinity. XAFS is useful particularly in the determination of structural properties of nanostructures. Including nanoparticles, nanorods, and thin films. X-ray diffraction (XRD) is a canonical tool to determine the crystalline structural properties. XRD is not very useful in analyzing nanoparticles because they do not have sufficient scattering sources. XAFS analysis require neither a crystalline structure nor a large number of scattering sources. Furthermore, in-situ measurements of XAFS would provide considerably useful information, particularly, for catalysts, batteries, chemical reactions, and others. In the seminar, I will introduce the XAFS technique and its applications to nanoparticles, ZnO nanorods, Pt nanoparticles, and VO2 films.


B.S. in Physics, Kyungpook National University, Daegu, Korea (Graduation in Feb., 1989)
Ph.D. in Physics, University of Missouri-Columbia (Graduation in Dec., 1999)
Academic Experiences
1994. June – 1999. Dec., Research Assistant in Department of Physics at University of Missouri-Columbia,
1999. Dec. – 2001. Dec., Research associate in Department of Physics at University of Washington
2002. Jan. – 2003. Aug., Postdoctoral physicist in Chemical Science Division at Lawrence Berkeley National Laboratory
2011. Feb. – 2012. Feb., Visiting scholar at X-ray Science Division of APS
2013. July – 2013. Dec., Visiting scholar at X-ray Science Division of APS
2003. Aug. – Current, professor in Department of Physics Education, Jeonbuk National University
Position Careers
2014 – Current, Chair of the Korean XAFS Society
2012 – Current, Director, Institute of Fusion Science, Jeonbuk National University
2015 – Current, Chair, Division of Science Education, Jeonbuk National University
2014 – Current, Vice-chair, Korea Proton Acceleration Users Association
2015 – Current, Lead guest editor, Journal of Nanomaterials
2012 – Current, Director of Institute of Fusion Science in Jeonbuk National University
2012 – Current, A board member of Korean Synchrotron Radiation User Association
2006 – 2006, Guest editor, International Journal of Nanoscience and Nanotechnology
2008 – 2013, Representative of XAFS division in Korean Synchrotron Radiation User Association


Prof. Yabing Qi


Sponsor or Contact: 
Ayako Masaki
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