1. Polymer Metrology & Technology Department, National Institute of Standards (NIS), Giza, Egypt
2. Department of Physics, College of Science, Taif University, Taif, Saudi Arabia
3. Building Physics and Environment Institute, Housing & Building National Research Center (HBRC), Dokki, Egypt
4. Nanotechnology Research Centre (NTRC), The British University in Egypt (BUE), El-Sherouk City, Egypt