BSc and MSc, Seoul National University, Republic of Korea; PhD, California Institute of Technology, USA. Former: Postdoctoral Fellow, University of California, Berkeley and Lawrence Berkeley National Laboratory; Assistant and Associate Professor, Yonsei University. Since March 2014, Associate Professor, KAIST. Research interest in nanostructured heterogeneous catalysts. Has developed various shape- and composition-controlled nanoparticle catalysts and applied them for fuel cell, biomass conversion, methane conversion, and water splitting.