1. Department of Mechanical Engineering, The Pennsylvania State University, University Park, PA 16802
2. Department of Printed Electronics Engineering, Sunchon National University, Suncheon 57922, South Korea
3. School of Electrical Engineering and Computer Science, The Pennsylvania State University, University Park, PA 16802
4. School of Semiconductor and Chemical Engineering, Chonbuk National University, Jeonju 54896, South Korea