1. Department of Materials Science and Engineering, Pohang University of Science and Technology (POSTECH), 77 Cheongam-ro, Nam-gu, Pohang-si, Gyeongsangbuk-do 37673, Republic of Korea
2. Marine Robotics R&D Division, Korea Institute of Robot and Convergence (KIRO), 39 Jigok-ro, Nam-gu, Pohang-si, Gyeongsangbuk-do 37666, Republic of Korea