1. Electronics Materials Lab, College of Science and Engineering, James Cook University, Townsville, QLD 4811, Australia
2. Nanomaterials and Devices Laboratory, Department of Physics, University of Houston, Houston, Texas 77204, United States
3. Mechanical Engineering Technology, College of Technology, University of Houston, Houston, Texas 77204-4020, United States
4. College of Science and Engineering, James Cook University, Townsville, QLD 4811, Australia