A high rectification ratio nanofluidic diode induced by an “ion pool”
Qingqing Liu, You Liu, Bingxin Lu, Yuting Wang, Yanglei Xu, Jin Zhai, Xia Fan
Abstract
film-covered AAO surface and its two ends are greatly nano-confined. Ion enrichment and ion depletion occur in the "ion pool" and are dependant on the applied voltage polarity. A rectification ratio of 458, which is in accordance with the highest value found in previous reports, was obtained from the cooperative effects of the two small open ends of the "ion pool". Furthermore, this value is enhanced to about 2000 under constant voltage. An excellent pH-sensitive rectification property, with a single rectification direction from acidic to basic conditions, has also been demonstrated.
Topics & Concepts
RectificationNanoporousIonMaterials scienceNanotechnologyChemical engineeringMembranePolyvinyl alcoholDiodeChemistryVoltageOptoelectronicsComposite materialOrganic chemistryPhysicsBiochemistryEngineeringQuantum mechanicsNanopore and Nanochannel Transport StudiesFuel Cells and Related MaterialsMembrane-based Ion Separation Techniques