1. Center
for Nanoscale Science and Engineering, Departments of Chemistry and
Chemical and Environmental Engineering, University of California, Riverside, California 92521-0403, United States
2. Advanced
Nanofabrication, Imaging and Characterization Core Lab, King Abdullah University of Science and Technology, Thuwal, Makkah 23955, Kingdom of Saudi Arabia
3. Department
of Physics, King Abdulaziz University, Jeddah, Makkah 21589, Kingdom of Saudi Arabia