[1] Materials Science Factory, Instituto de Ciencia de Materiales de Madrid (ICMM-CSIC), Madrid
[2] Department of Chemistry and Biochemistry, University of California Los Angeles, Los Angeles, CA
[3] California NanoSystems Institute, University of California Los Angeles, Los Angeles, CA
[4] Department of Physics and Astronomy, Iowa State University, Ames, IA
[5] Ames Laboratory, US Department of Energy, Iowa State University, Ames, IA
[6] Department of Physics, University of South Florida, Tampa, FL
[7] Advanced Research Institute of Multidisciplinary Science, Beijing Institute of Technology, Beijing
[8] GISC, Departamento de Física de Materiales, Universidad Complutense de Madrid, Madrid
[9] Department of Mechanical and Materials Engineering, University of Nebraska-Lincoln, Lincoln, NE
[10] Nebraska Center for Materials and Nanoscience, University of Nebraska-Lincoln, Lincoln, NE
[11] Department of Electrical and Computer Engineering, University of Nebraska-Lincoln, Lincoln, NE