Carbohydrate-actuated nanofluidic diode: switchable current rectification in a nanopipette Online Supporting Information Boaz Vilozny, a Alexander Wollenberg, a,b Paolo Actis, a Daniel Hwang, a Bakthan Singaram, b Nader Pourmand* a a Department of Biomolecular Engineering, Baskin School of Engineering at University of California Santa Cruz, 1156 High Street, Santa Cruz, CA 95064, USA b Department of Chemistry and Biochemistry, University of California Santa Cruz, 1156 High Street, Santa Cruz, CA 95064, USA E-mail: pourmand@soe.ucsc.edu Contents Structures of polymers Synthesis of polymer PVP-Bn 1 H-NMR spectrum of PVP-BA 1 H-NMR spectrum of PVP-Bn 1 H-NMR spectrum of PVP Titrations to Measure pH Response of PVP-BA Micropipette embedded with PVP-BA Ionic strength and pH effects on current rectification. Inversion of current rectification with fructose for multiple nanopipettes. Reversibility of ion current modulation with ARS Electronic Supplementary Material (ESI) for Nanoscale This journal is © The Royal Society of Chemistry 2013