1. Center for
Nanoparticle Research,
Institute for Basic Science, and School of Chemical and Biological
Engineering, Seoul National University,
Seoul 151-742, Korea
2. Laboratory
for Advanced Molecular
Probing (LAMP), Research Center for Convergence Nanotechnology, Korea Research Institute of Chemical Technology, Daejeon
305-600, Korea
3. Department
of Biochemistry, Chungnam National University, Daejeon 305-764, Korea