1. Creative Research Initiative Center for Functionally Antagonistic Nano-Engineering; Department of Mechanical Engineering; Korea Advanced Institute of Science and Technology (KAIST); Daehak-ro 291 Yuseong-gu Daejeon 34141 Republic of Korea
2. Active Materials and Smart Living Laboratory; Department of Mechanical Engineering; University of Nevada, Las Vegas (UNLV); Las Vegas NV 89154 USA