1. King Abdullah Institute for Nanotechnology, King Saud University; Riyadh 11451 Saudi Arabia
2. Department of Physics and Astronomy; College of Science; King Saud University; Riyadh 11451 Saudi Arabia
3. Research Chair in Drug Targeting and Treatment of Cancer Using Nanoparticles; Department of Biochemistry; College of Science; King Saud University; Riyadh 11451 Saudi Arabia