1. School of Science, Penn State Erie, The Behrend College, 4205 College Drive, Erie, Pennsylvania 16563, USA
2. Department of Applied Chemistry and Institute of Molecular Science, National Chiao Tung University, Hsinchu 300093, Taiwan
3. Center for Emergent Functional Matter Science, National Chiao Tung University, Hsinchu 300093, Taiwan
4. Institute of Atomic and Molecular Sciences, Academia Sinica, Taipei 106319, Taiwan