1. Department of Mechanical Engineering, The University of Texas at El Paso, El Paso, TX USA
2. W.M. Keck Center for 3D Innovation, the University of Texas at El Paso, El Paso, TX USA
3. Department of Physics, The University of Texas at El Paso, El Paso, TX USA
4. Materials Physics and Applications, Los Alamos National Laboratory, Los Alamos, NM USA