Prof. Tae-Hyun Yoon has received his B.S./M.S. degree at KAIST (Korea Advanced Institute of Science and Technology) and worked as a researcher for SK TRI (Taeduk Research Institute) and SAIT (Samsung Advanced Institute of Technology). Then, he studied at Stanford University for his Ph.D degree and joined the current position at the chemistry department of Hanyang University (Seoul, South Korea) as a faculty member. He is currently leading a research group (Nanoscale Characterization and Environmental Chemisty lab., ncec.hanyang.ac.kr) and a nanosafety research community (S2NANO, portal.s2nano.org). His current research is focused on the 1) Predictive Nanotoxicology, 2) Developments of Advanced Nanoparticle Characterization Methods, and 3) Synchrotron-based Soft X-ray SpectroNanoscopy. He is a principal investigator of the Korean government funded project “development of user-friendly nanosafety prediction system” and participant in the EU NanoReg and ACEnano projects.