Intrinsic high water/ion selectivity of graphene oxide lamellar membranes in concentration gradient-driven diffusion† †Electronic supplementary information (ESI) available: Materials and methods, supplementary text and figures. See DOI: 10.1039/c6sc02865a Click here for additional data file.

Pengzhan Sun, Renzhi Ma, Hui Deng, Zhigong Song, Zhen Zhen, Kunlin Wang, Takayoshi Sasaki, Zhiping Xu, Hongwei Zhu State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China International Center for Materials Nanoarchitectonics (WPI-MANA), National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan Department of Engineering Mechanics, Tsinghua University, Beijing 100084, China Center for Nano and Micro Mechanics (CNMM), Tsinghua University, Beijing 100084, China Corresponding authors. Emails: [email protected]; [email protected]; [email protected].