1. Department of Materials Science and Engineering, The Pennsylvania State University, University Park, Pennsylvania 16802, United States
2. National Research and Development Institute for Cryogenic and Isotopic Technologies, ICSI, 240050 Râmnicu Valcea, Romania
3. Total Petrochemicals & Refining USA, Inc., Total Cray Valley, 665 Stockton Drive, Suite 100, Exton, Pennsylvania 19341, United States