He received his Ph.D. in Materials Science and Engineering from POSTECH, Korea in 2002. Before joining SKKU in 2016, he was an assistant professor and associate professor in POSTECH from 2009 to 2015. He has worked at Max-Planck-Institute for Metal Research as post-doc researcher, Korean Research Institute of Standards and Science (KRISS) as senior researcher, Erich Schmid Institute at Leoben, Austria, Oak Ridge National Laboratory as visiting researcher and Korean Basic Science Institute (KBSI) as senior researcher. His research group at SKKU pursues fundamental understanding of materials’ behavior, phase stability and physical properties emerging at nanometer scales by using advanced TEM/STM techniques.