He received a B.S. degree in Materials Science and a M.S. degree in Medical Science from Yonsei University, South Korea. He then moved to the USA and received his Ph.D. degree in Materials Science from University of California, San Diego in 2009. He joined the faculty in the Department of Bio and Brain Engineering at KAIST in 2010, after postdoctoral studies at University of California, Berkeley. He was promoted to Associate Professor in 2015. He is the recipient of a Young Investigator Award from the Korean Society of Medical and Biological Engineering. He is the author of over 65 research publications in journals including Nat. Mater., Nat. Nanotech., Nat. Comm., and PNAS, in subjects related to nanomedicine, drug delivery, and biomaterials. He has 15 patents or patents pending.