1. Department of Chemical Engineering and Biotechnology, National Taipei University of Technology, No. 1, Chung-Hsiao East Road, Section 3, Taipei 10608, Taiwan, ROC
2. Department of Chemistry, National Taiwan University, No. 1, Roosevelt Road, Section 4, Taipei 10617, Taiwan, ROC
3. Institute of Atomic and Molecular Sciences, Academia Sinica, No. 1, Roosevelt Road, Section 4, Taipei 10617, Taiwan, ROC
4. Department of Physics (MMV), Banaras Hindu University, Varanasi 221005, Uttar Pradesh , India