1. Egyptian Petroleum Research Institute, Nasr City, Cairo 11727, Egypt
2. Enhanced Oil Recovery Unit, Egyptian Petroleum Research Institute, Nasr City, Cairo 11727, Egypt
3. Faculty of Nanotechnology, Cairo University, El-Sheikh Zayed Campus, sixth October, Giza 12588, Egypt
4. Department of Chemistry, University of Miami, 1301 Memorial Drive, Coral Gables, Florida 33146, United States