Charge Inversion and Calcium Gating in Mixtures of Ions in Nanopores
Kabin Lin, Chih‐Yuan Lin, Jake W. Polster, Yunfei Chen, Zuzanna S. Siwy
Abstract
were even ten times smaller than the ion currents in KCl solution. The ion current blockage was explained by the effect of local charge inversion where accumulated calcium ions switch the effective surface charge from negative to positive. The modulation of surface charge with calcium leads to concentration and voltage dependent local charge density and ion current. The combined experimental and modeling results provide a link between calcium ion-induced changes in surface charge properties and resulting ionic transport.
Topics & Concepts
ChemistryCalciumIonAnalytical Chemistry (journal)Surface chargeNanoporeInorganic chemistryChemical physicsNanotechnologyChromatographyPhysical chemistryMaterials scienceOrganic chemistryNanopore and Nanochannel Transport StudiesFuel Cells and Related MaterialsIon-surface interactions and analysis