1. Daegu Gyeongbuk Institute of Science and Technology (DGIST), 50-1 Sang-ri,
Hyeonpung-myeon, Dalseong-gun, Daegu 711-873, Republic of Korea
2. Department of Chemical Engineering, Pohang University of Science and Technology (POSTECH), San 31 Hyoja-dong, Pohang 790-784, Republic of Korea