[1] Univ Calif Riverside, Dept Chem, Riverside, CA 92521 USA
[2] Univ Colorado, Dept Mech Engn, Boulder, CO 80309 USA
[3] Univ Calif Riverside, Dept Chem & Environm Engn, Riverside, CA 92521 USA
[4] Univ Calif Riverside, Mat Sci & Engn Program, Riverside, CA 92521 USA
[5] Univ Colorado, Mat Sci & Engn Program, Boulder, CO 80309 USA
[6] South China Univ Technol, Inst Polymer Optoelect Mat & Devices, State Key Lab Luminescent Mat & Devices, Guangzhou 510640, Guangdong, Peoples R China