Alam Sher, Anand Chokkalingam, Ariga Katsuhiko, Mori Toshiyuki, Vinu Ajayan
International Center for Materials Nanoarchitectonics, National Institute for Materials Science, 1-1 Namiki, Tsukuba 305-0044, Ibaraki, Japan.
Angew Chem Int Ed Engl. 2009;48(40):7358-61. doi: 10.1002/anie.200901570.