[1] Peking Univ, Coll Chem & Mol Engn, Natl Lab Mol Sci, Ctr Nanochem,Beijing Sci & Engn Ctr Nanocarbons B, Beijing 100871, Peoples R China
[2] Beijing Graphene Inst BGI, Beijing 100095, Peoples R China
[3] Peking Univ, Sch Mat Sci & Engn, Beijing 100871, Peoples R China
[4] City Univ Hong Kong, Natl Precious Met Mat Engn Res Ctr NPMM, Hong Kong Branch, Dept Chem, Hong Kong, Peoples R China
[5] City Univ Hong Kong, Shenzhen Res Inst, Shenzhen 518057, Peoples R China
[6] Univ Tokyo, Dept Mech Engn, Tokyo 1138656, Japan