1. Department of Mechanical Engineering, The University of Alabama, Tuscaloosa, Alabama 35487, United States
2. Department of Chemistry, The Pennsylvania State University, University Park, Pennsylvania 16802, United States
3. Department of Mechanical Engineering, The University of Illinois at Urbana−Champaign, Urbana, Illinois 61801, United States
4. Department of Materials Science and Engineering, The Pennsylvania State University, University Park, Pennsylvania 16802, United States
5. Department of Materials Science and Engineering, National Yang Ming Chiao Tung University, Hsin-Chu 30010, Taiwan