[1] Rice Univ, Dept Chem, 6100 Main St, Houston, TX 77005 USA
[2] Lanzhou Univ, Sch Phys Sci & Technol, Lanzhou 730000, Peoples R China
[3] Rice Univ, NanoCarbon Ctr, 6100 Main St, Houston, TX 77005 USA
[4] Southeast Univ, Sch Biol Sci & Med Engn, State Key Lab Bioelect, Nanjing 210096, Jiangsu, Peoples R China
[5] Rice Univ, Dept Mat Sci & NanoEngn, 6100 Main St, Houston, TX 77005 USA
[6] Univ Cent Florida, Dept Mat & Engn, 12424 Res Pkwy Suite 423, Orlando, FL 32826 USA