1. Department of Chemistry, School of Sciences & Engineering, The American University in Cairo, AUC Avenue, New Cairo11835, Egypt
2. Institute of Textile Research and Technology, National Research Centre, El behouth Street, Dokki, Giza12622, Egypt
3. Nanotechnology Research Center (NTRC), The British University in Egypt, El-Shorouk City,
Suez Desert Road, P.O. Box 43, Cairo11837, Egypt