1. MOE Key Laboratory of Cluster Science
2. School of Chemistry and Chemical Engineering
3. Beijing Institute of Technology
4. Beijing
5. China
6. College of Chemistry
7. Peking University
8. Department of Mechanical Engineering
9. Virginia Polytechnic Institute and State University
10. Blacksburg
11. 24061 USA
12. Department of Highly Sensitive X-ray Spectroscopy
13. Helmholtz-Zentrum Berlin für Materialien und Energie
14. Berlin
15. Germany