1. Department of Materials Science and Engineering and Beckman Institute, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, Department of Mechanical Science and Engineering, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, Department of Physics, Beckman Institute, Frederick-Seitz Materials Research Laboratory, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, Frederick-Seitz Materials Research Laboratory, University of Illinois at Urbana-Champaign,...