1. Department of Materials Science and Engineering, National Chiao Tung University, Hsinchu, Taiwan (ROC), Institute of Chemistry, Academia Sinica, Taipei, Taiwan (ROC), Department of Chemical Engineering, National Taiwan University, Taipei, Taiwan (ROC), Research Center for Applied Sciences, Academia Sinica, Taipei, Taiwan (ROC), and Department of Photonics, National Chiao Tung University, Hsinchu, Taiwan (ROC)