1. Department of Chemistry, National Taiwan Normal University, Taipei 11677, Taiwan, ROC
2. Department of Applied Physics, National Pingtung University, Pingtung 90003, Taiwan, ROC
3. Department of Chemistry, National Sun Yat-Sen University, Kaohsiung 80424, Taiwan, ROC
4. Graduate Institute of Applied Science and Technology, National Taiwan University of Science & Technology, Taipei 10673, Taiwan, ROC
5. Department of Chemistry, Washington University, Saint Louis, Missouri 63130, United States