[1] Clemson Univ, Dept Phys & Astron, Clemson, SC 29634 USA
[2] Natl Renewable Energy Lab, Chem & Nanosci Ctr, Golden, CO 80401 USA
[3] Nankai Univ, Sch Mat Sci & Engn, Tianjin 300350, Peoples R China
[4] Brock Univ, Dept Chem, Yousef Haj Ahmad Dept Engn, St Catharines, ON L2S 3A1, Canada
[5] Huazhong Univ Sci & Technol, Sch Opt & Elect Informat, Wuhan 430074, Peoples R China
[6] Jilin Univ, Inst Atom & Mol Phys, Jilin Prov Key Lab Appl Atom & Mol Spect, Changchun 130012, Peoples R China
[7] Lawrence Berkeley Natl Lab, Mat Sci Div, Berkeley, CA 94720 USA
[8] Univ Alabama, Ctr Mat Informat Technol, Dept Elect & Comp Engn, Tuscaloosa, AL 35487 USA
[9] Brown Univ, Dept Chem, Providence, RI 02912 USA