1. Department of Materials, University of California, Santa Barbara, CA 93106;
2. Department of Mechanical Engineering, University of California, Santa Barbara, CA 93106;
3. School of Engineering, Aberdeen University, King’s College, Aberdeen AB24 3UE, Scotland;
4. INM—Leibniz Institute for New Materials, Campus D2 2, Saarbrücken 66123, Germany
5. DMMM, Politecnico di BARI, Via Edoardo Orabona 4, Bari 70126, Italy;
6. Department of Mechanical Engineering, Hamburg University of Technology, Am Schwarzenberg-Campus 1, Hamburg 21073, Germany
7. DII, Università di Napoli Federico II, Piazzale Vicenzo Tecchio 80, 80125 Napoli, Italy
8. School of Engineering, Brown University, Providence, RI 02912