1. Department
of Materials Science and Engineering, University of California, Los Angeles, California 90095, United States
2. Department of Chemistry and Biochemistry, University of California, Los Angeles, California 90095, United States
3. Sustainable
Energy Technologies Centre, College of Engineering, King Saud University, Riyadh 11421, Kingdom of Saudi Arabia
4. California Nanosystems Institute, University of California, Los Angeles, California 90095, United States