[1] Lanzhou Univ, Dept Mat Sci, Sch Phys Sci & Technol, Lanzhou 730000, Gansu, Peoples R China
[2] Lanzhou Univ, Minist Educ, Key Laborary Special Funct Mat & Struct Design, Lanzhou 730000, Gansu, Peoples R China
[3] Mitsubishi Chem Grp Sci & Technol Res Ctr Inc, Yokohama, Kanagawa 2278502, Japan