1. State Key Laboratory of Chem/Bio-Sensing and Chemometrics; College of Chemistry and Chemical Engineering; Hunan University; Changsha 410082 P.R. China
2. SZU-NUS Collaborative Innovation Center for Optoelectronic Science and Technology; Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province; College of Optoelectronic Engineering; Shenzhen University; Shenzhen 518060 P.R. China
3. Department of Macromolecular Science and Engineering; Case Western Reserve University; Cleveland USA