Large-Scale Synthesis of Uniform and Extremely Small-Sized Iron Oxide Nanoparticles for High-Resolution T 1 Magnetic Resonance Imaging Contrast Agents

World Class University Program of Chemical Convergence for Energy & Environment, and School of Chemical and Biological Engineering, and Department of Materials Science and Engineering, Seoul National University, Seoul 151-744, Korea Diagnostic Radiology, Seoul National University Hospital, and the Institute of Radiation Medicine, Medical Research Center, Seoul National University, Seoul 110-744, Korea Department of Physics, Seoul National University, Seoul 151-742, Korea