1. State Key
Laboratory of High Performance Ceramics and Superfine Microstructure,
Shanghai Institution of Ceramics, Chinese Academy of Sciences, Shanghai 200050, P. R. China
2. Centre of Polymer and Carbon Materials, Polish Academy of Sciences, M. Curie-Sklodowskiej 34, Zabrze 41-819, Poland
3. IFW Dresden, Institute for Complex
Materials, P.O. Box 270116, D-01171 Dresden, Germany
4. Department of Energy Science, Sungkyunkwan University, Suwon 440-746, Republic of Korea
5. IBS
Center for Integrated Nanostructure Physics, Institute for Basic Science (IBS), Daejon 305-701, Republic of Korea