Skip to main content
U.S. Department of Energy
Office of Scientific and Technical Information

Current–Induced Ion Concentration Polarization at a Perfect Ion–Exchange Patch in an Infinite Insulating Wall

Journal Article · · ChemElectroChem
 [1];  [2];  [3]
  1. National Academy of Sciences of Ukraine, Kyiv (Ukraine); University of Notre Dame
  2. Univ. of Notre Dame, IN (United States)
  3. ICREA, Barcelona (Spain); Polytechnic Univ. of Catalonia, Barcelona (Spain)
This research examines theoretically the ion concentration polarization, ion fluxes, and electrostatic fields near an ion exchange patch in the wall of an electrified fluidic channel. These phenomena are important in related microfluidic ion-preconcentration systems. Under an electric field, counterions enter the ion-exchange patch at one side and leave at the other, with salt depletion occurring near the entrance and accumulation near the exit. Furthermore, the high patch conductivity and the concentration profiles lead to local electric field perturbations that may facilitate preconcentration. This study includes analytical expressions of ion concentrations and electrochemical potentials at small to moderate electric fields, as well as numerical simulations. Additionally, a simple matrix of polynomial coefficients (obtained via fitting of numerical data) enables analytical calculation of the 2-dimensional concentration profiles at all electric fields within the range investigated in the numerical simulations. This is possible because a single dimensionless parameter controls this problem.
Research Organization:
Univ. of Notre Dame, IN (United States)
Sponsoring Organization:
Spanish Ministry of Economy and Competitiveness; USDOE Office of Science (SC), Basic Energy Sciences (BES). Chemical Sciences, Geosciences & Biosciences Division
Grant/Contract Number:
SC0017618
OSTI ID:
1785977
Journal Information:
ChemElectroChem, Journal Name: ChemElectroChem Journal Issue: 6 Vol. 7; ISSN 2196-0216
Publisher:
ChemPubSoc EuropeCopyright Statement
Country of Publication:
United States
Language:
English

References (27)

Highly Selective Current‐Induced Accumulation of Trace Ions at Micro‐/NanoPorous Interfaces journal April 2019
Simultaneous isolation and preconcentration of exosomes by ion concentration polarization journal March 2018
Ion exchange membranes: New developments and applications journal January 2017
Specific co-ion sorption and diffusion properties influence membrane permselectivity journal October 2018
High-ionic-strength pre-concentration via ion concentration polarization for blood-based biofluids journal September 2018
Million-fold Preconcentration of Proteins and Peptides by Nanofluidic Filter journal July 2005
Bipolar Electrodes: A Useful Tool for Concentration, Separation, and Detection of Analytes in Microelectrochemical Systems journal November 2010
High Yield Sample Preconcentration Using a Highly Ion-Conductive Charge-Selective Polymer journal July 2010
Microfluidic Protein Preconcentrator Using a Microchannel-Integrated Nafion Strip: Experiment and Modeling journal December 2010
Multiphysics Simulation of Ion Concentration Polarization Induced by Nanoporous Membranes in Dual Channel Devices journal July 2014
Bipolar Electrode Focusing: Simultaneous Concentration Enrichment and Separation in a Microfluidic Channel Containing a Bipolar Electrode journal November 2009
Bipolar Electrode Focusing: The Effect of Current and Electric Field on Concentration Enrichment journal December 2009
A Limiting Case of Constant Counterion Electrochemical Potentials in the Membrane for Examining Ion Transfer at Ion-Exchange Membranes and Patches journal September 2019
Electrochemical Sensing in Microfluidic Systems Using Electrogenerated Chemiluminescence as a Photonic Reporter of Redox Reactions journal November 2002
Electrokinetic Trapping and Concentration Enrichment of DNA in a Microfluidic Channel journal October 2003
Pressure-Driven Bipolar Electrochemistry journal April 2011
Electrokinetics in Microfluidic Channels Containing a Floating Electrode
  • Dhopeshwarkar, Rahul; Hlushkou, Dzmitry; Nguyen, Mark
  • Journal of the American Chemical Society, Vol. 130, Issue 32, p. 10480-10481 https://doi.org/10.1021/ja8036405
journal August 2008
Sample pre-concentration with high enrichment factors at a fixed location in paper-based microfluidic devices journal January 2016
Deciphering ion concentration polarization-based electrokinetic molecular concentration at the micro-nanofluidic interface: theoretical limits and scaling laws journal January 2018
Electric field gradient focusing in microchannels with embedded bipolar electrode journal January 2009
Theory and experiments of concentration polarization and ion focusing at microchannel and nanochannel interfaces journal January 2010
Nanofluidic preconcentration device in a straight microchannel using ion concentration polarization journal January 2012
Ion concentration polarization on paper-based microfluidic devices and its application to preconcentrate dilute sample solutions journal January 2015
Effect of concentration polarization on permselectivity journal January 2014
Effect of advection on transient ion concentration-polarization phenomenon journal August 2017
Microfluidic Systems with Ion-Selective Membranes journal June 2014
Understanding methods of preparation and characterization of pore-filling polymer composites for proton exchange membranes: a beginner’s guide journal September 2017