Youngoh Lee, Jinyoung Myoung, Soowon Cho, Jonghwa Park, Jinyoung Kim, Hochan Lee, Youngsu Lee, Seungjae Lee, Chunggi Baig*, and Hyunhyub Ko*, “Bioinspired Gradient Conductivity and Stiffness for Ultrasensitive Electronic Skins“, ACS Nano., 2021, 15, 1795-1804