1. Department
of Materials Science and NanoEngineering and the Smalley Institute
for Nanoscale Science and Technology, Rice University, Houston, Texas 77005, United States
2. Technological Institute of Superhard and Novel Carbon Materials, Moscow 142190, Russian Federation
3. Moscow Institute of Physics and Technology, Dolgoprudny 141700, Russian Federation
4. National University of Science and Technology MISiS, Moscow 119049, Russian Federation