1. Department of Nano Convergence Engineering, Jeonbuk National University, Jeonju-si, Jeollabuk-do 54896, Republic of Korea
2. Carbon Nano Convergence Technology Center for Next Generation Engineers (CNN), Jeonbuk National University, Jeonju-si, Jeollabuk-do 54896, Republic of Korea
3. Department of Organic Materials and Fiber Engineering, Jeonbuk National University, Jeonju-si, Jeollabuk-do 54896, Republic of Korea