Changhyun Roh received his Ph.D degree at the Department of Chemical Engineering, Seoul National University, Seoul, Republic of Korea, in 2007. Now he is a principal researcher/professor at the Korea Atomic Energy Research Institute/University of Science and Technology, Republic of Korea. His current research interests include functional materials, environmental science, nanotechnology, bio-technology, and interdisciplinary research. He has published more than 110 research articles in peer-reviewed international papers and 25 patents. He has several projects ongoing as a project investigator.