1. School of Electrical
and Electronic Engineering, Yonsei University, 50 Yonsei-Ro, Seodaemun-Gu, Seoul 03722, Republic of Korea
2. Division of Advanced Materials Engineering, Chonbuk National University, 567 Baekje-daero, deokjin-gu, Jeonju-si, Jeollabuk-do 54896, Republic of Korea
3. Department
of Materials Science and Engineering, Yonsei University, 50 Yonsei-Ro, Seodaemun-Gu, Seoul 03722, Republic of Korea
4. Air Liquide Korea Co., LTD. 50 Yonsei-ro, Seodaemun-Gu, Seoul 120-749, Republic of Korea
5. Air Liquide Laboratories, 28 Wadai, Tsukuba, Ibaraki 300-4247, Japan