Supporting Information: Macroscopic Salt Rejection through Electrostatically Gated Nanoporous Graphene Roman M. Wyss, †,‖ Tian Tian, ‡,‖ Khadija Yazda, ¶ Hyung Gyu Park, ∗,¶,§ and Chih-Jen Shih ∗,‡ †Soft Materials, Department of Materials, Eidgen¨ ossische Technische Hochschule (ETH) Z¨ urich, Vladimir-Prelog-Weg 1-5, Z¨ urich CH-8093, Switzerland. ‡Institute for Chemical and Bioengineering Department of Chemistry and Applied Biosciences, Eidgen¨ ossische Technische Hochschule (ETH) Z¨ urich, Vladimir-Prelog-Weg 1-5, Z¨ urich CH-8093, Switzerland. ¶Nanoscience for Energy Technology and Sustainability, Department of Mechanical and Process Engineering, Eidgen¨ ossische Technische Hochschule (ETH) Z¨ urich, Tannenstrasse 3, Z¨ urich CH-8092, Switzerland. §Mechanical Engineering, Pohang University of Science and Technology (POSTECH), 77 Cheongam-ro, Nam-gu, Pohang, Gyeongbuk, 37673, Republic of Korea. ‖R. M. W. and T. T. contributed equally to this work E-mail: iduserpark@gmail.com; chih-jen.shih@chem.ethz.ch S-1