1. Department of Physics, School of Physical and Mathematical Sciences, University of Ghana, Legon-Accra, Ghana
2. Department of Materials Science and Engineering, School for Matter, Transportation and Energy, Arizona State University, Tempe, Arizona, AZ 85282, USA
3. Department of Materials Science and Engineering, School of Engineering Sciences, University of Ghana, Legon-Accra, Ghana
4. Institute for Advanced Materials, Devices and Nanotechnology, Department of Materials Science and Engineering, Rutgers University, Piscataway, New Jersey, NJ 08854, USA
5. Department of Mechanical Engineering, Worcester Polytechnic Institute, 100 Institute road, Worcester, MA, USA