1. Department of Chemistry, Haverford College, 370 Lancaster Avenue, Haverford, PA 19041, United States
2. Centre for Advanced Materials (CAM), Qatar University, 2713, Doha, Qatar
3. Advanced Nanomaterials Research Laboratory, Department of Nanotechnology, Noorul Islam Centre for Higher Education, Kumaracoil, India
4. Low Dimensional Materials Research Centre (LDMRC), Department of Physics, Faculty of Science, University of Malaya, Kuala Lumpur, Malaysia