pH- and ionic strength-controlled cation permselectivity in amine-modified nanoporous opal films

Langmuir : the ACS Journal of Surfaces and Colloids
Michael R NewtonIlya Zharov

Abstract

The influence of pH and ionic strength on permselective transport in nanoporous opal films prepared from 440 nm silica spheres was investigated by cyclic voltammetry in aqueous and acetonitrile solutions. Three-layer opal films were deposited from a 1.5 wt % colloidal solution of silica spheres onto 25-microm-diameter Pt microdisk electrodes shrouded in glass. The films were chemically modified by immersing them in a dry acetonitrile solution of 3-aminopropyl triethoxysilane. When the surface amino groups of the modified opal films are protonated and there is little or no supporting electrolyte present in solution, the flux of cationic redox species through the opal membrane is blocked because of electrostatic repulsion. The permselectivity is pH-dependent and can be modulated by adjusting the Debye screening length within the nanopores of the opal by changing the ionic strength of the contacting solution.

References

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Sep 24, 2004·Langmuir : the ACS Journal of Surfaces and Colloids·Jing-Jong ShyueChaim N Sukenik
May 19, 2005·Journal of the American Chemical Society·Michael R NewtonIlya Zharov
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Citations

Sep 6, 2013·Analytical Chemistry·Maral P S Mousavi, Philippe Bühlmann
May 26, 2010·Physical Chemistry Chemical Physics : PCCP·Montree Sawangphruk, John S Foord
Sep 25, 2010·Chemical Communications : Chem Comm·Alexis E AbelowIlya Zharov
Nov 26, 2010·Chemical Communications : Chem Comm·Patricia Anne A Ignacio-de Leon, Ilya Zharov
Sep 13, 2013·Journal of Physics. Condensed Matter : an Institute of Physics Journal·Debabrata PanjaAnatoly B Kolomeisky
Nov 8, 2008·Langmuir : the ACS Journal of Surfaces and Colloids·Damien D BrewerL E Scriven
Feb 16, 2008·Langmuir : the ACS Journal of Surfaces and Colloids·Joanna J Smith, Ilya Zharov
Mar 18, 2010·Langmuir : the ACS Journal of Surfaces and Colloids·Thipphaya CherdhirankornKaloian Koynov
Jun 22, 2006·Journal of the American Chemical Society·Julie Cichelli, Ilya Zharov
May 14, 2009·Langmuir : the ACS Journal of Surfaces and Colloids·Andrew K BohatyIlya Zharov
Dec 5, 2008·Langmuir : the ACS Journal of Surfaces and Colloids·Olga Schepelina, Ilya Zharov
Nov 3, 2007·Langmuir : the ACS Journal of Surfaces and Colloids·Olga Schepelina, Ilya Zharov
Jul 13, 2007·Langmuir : the ACS Journal of Surfaces and Colloids·Mark A SnyderMichael Tsapatsis
Jan 5, 2010·Chemistry of Materials : a Publication of the American Chemical Society·Eric M Brozek, Ilya Zharov
Nov 30, 2006·Langmuir : the ACS Journal of Surfaces and Colloids·Olga Schepelina, Ilya Zharov
Dec 10, 2016·ACS Applied Materials & Interfaces·Xingyu LinBin Su
Aug 9, 2018·Langmuir : the ACS Journal of Surfaces and Colloids·Patricia Anne A Ignacio-de LeonIlya Zharov
Oct 13, 2006·Journal of the American Chemical Society·Gangli WangHenry S White
Jun 14, 2006·Langmuir : the ACS Journal of Surfaces and Colloids·Andrew K Bohaty, Ilya Zharov

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