1. Institute of Nanoscience and Nanotechnology, Universiti Putra Malaysia, 43400, UPM Serdang, Selangor, Malaysia
2. Applied Electromagnetic Laboratory 1, Department of Physics, Faculty of Science, Universiti Putra Malaysia, 43400 UPM Serdang, Selangor, Malaysia
3. Geopolymer & Green Technology, Center of Excellence (CEGeoGTech), Universiti Malaysia Perlis, Pauh Putra Campus, 02600 Arau, Perlis
4. Department of Physics, Faculty of Production Engineering and Materials Technology, Czestochowa University of Technology, al. Armii Krajowej 19, 42-200 Częstochowa, Poland