Chanki Ha‡, Jungki Ryu§, and Chan Beum Park*‡§
‡Science and Engineering of Materials Interdisciplinary Program, Arizona State University, Tempe, Arizona 85287, and §Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology, 373-1 Guseong-dong Yuseong-gu, Daejeon, Republic of Korea
*To whom correspondence should be addressed