1. Cluster for Advanced Macromolecular Design, School of Chemical Engineering, The University of New South Wales, Sydney, New South Wales 2052, Australia
2. Electron Microscope Unit, The University of New South Wales, Sydney, New South Wales 2052, Australia
3. Hiroshima R&D Center, Mitsubishi Chemical Corporation, 20-1 Miyuki-cho, Otake, Hiroshima 739-0693, Japan