1. Department of Materials Science and Engineering, University of California, San Diego, 9500 Gilman Drive, SME Building, Room 320, La Jolla, California 92903, USA
2. Department of Mechanical and Aerospace Engineering, University of California, San Diego, California 92093, USA
3. Departments of Mechanical and Aerospace Engineering and Materials Science and Engineering, University of California, San Diego, 9500 Gilman Drive, SME Building, Room 345F, La Jolla, California 92903, USA