1. Wearable Platform Materials Technology Center Department of Materials Science and Engineering Korea Advanced Institute of Science and Technology (KAIST) 291 Daehak‐ro, Yuseong‐gu Daejeon 34141 Republic of Korea
2. Department of Mechanical Engineering Massachusetts Institute of Technology Cambridge MA 02139 USA
3. Department of Materials Science and Engineering University of California at Berkeley Berkeley CA 94720 USA
4. Materials Sciences Division Lawrence Berkeley National Laboratory Berkeley CA 94720 USA