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Title: Direct Observation of Charge Inversion in Divalent Nanofluidic Devices

Journal Article · · Nano Letters
 [1];  [2];  [1];  [1]
  1. Yale Univ., New Haven, CT (United States)
  2. Pennsylvania State Univ., University Park, PA (United States)

Solid-state nanofluidic devices have proven to be ideal systems for studying the physics of ionic transport at the nanometer length scale. When the geometrical confining size of fluids approaches the ionic Debye screening length, new transport phenomena occur, such as surface mediated transport and permselectivity. Prior work has explored these effects extensively in monovalent systems (e.g., predominantly KCl and NaCl). In this report, we present a new characterization method for the study of divalent ionic transport and have unambiguously observed divalent charge inversion at solid/fluid interfaces. In conclusion, this observation has important implications in applications ranging from biology to energy conversion.

Research Organization:
Energy Frontier Research Centers (EFRC) (United States). Nanostructures for Electrical Energy Storage (NEES)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
SC0001160; DMR 1119826
OSTI ID:
1370528
Journal Information:
Nano Letters, Vol. 15, Issue 8; Related Information: NEES partners with University of Maryland (lead); University of California, Irvine; University of Florida; Los Alamos National Laboratory; Sandia National Laboratories; Yale University; ISSN 1530-6984
Publisher:
American Chemical SocietyCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 68 works
Citation information provided by
Web of Science

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A Surface‐Functionalized Ionovoltaic Device for Probing Ion‐Specific Adsorption at the Solid–Liquid Interface journal September 2018
Electrokinetic transport of monovalent and divalent cations in silica nanochannels journal January 2016
Selective layer-free blood serum ionogram based on ion-specific interactions with a nanotransistor journal February 2018
On the physics of both surface overcharging and charge reversal at heterophase interfaces journal January 2018
Theory of diffusioosmosis in a charged nanochannel journal January 2018
A molecular theory for predicting the thermodynamic efficiency of electrokinetic energy conversion in slit nanochannels journal February 2018
Ion transport by gating voltage to nanopores produced via metal-assisted chemical etching method journal March 2018
A nanofluidic ion regulation membrane with aligned cellulose nanofibers journal February 2019
Electrokinetic Analysis of Energy Harvest from Natural Salt Gradients in Nanochannels journal October 2017