The use of graphene oxide as a fixed charge carrier in ion-selective electrodes

Glen O'Neil, Maria Fouskaki, Samuel P. Kounaves, Nikos A. Chaniotakis

Research output: Contribution to journalArticleResearchpeer-review

3 Citations (Scopus)

Abstract

Abstract Here we present for the first time the use of graphene oxide nanoparticles as fixed-charge carriers for the development of membrane-based cation selective ion-selective electrodes (ISEs). The GO nanoparticles are dispersed into tetrahydrofuran, and thus easily incorporated into the ISE membrane. The effect of GO concentration on bulk membrane resistance (Rb) is measured using electrochemical impedance spectroscopy, and a significant decrease in Rb is observed with increasing [GO]. The permselectivity of these membranes was investigated using conventional potentiometry, and the results suggest that GO is able to decrease membrane resistance through electrostatic interactions between the negatively charged particles and the positively charged cations. The use of these nanostructures in the pH-sensitive ISE based on ETH-1907 ionophore paves the way to a new method of constructing potentiometric sensors. ISEs with increased lifetimes and stabile potentials could be developed based on these materials, allowing ionophore and charge carrier to be combined in a way that promotes miniaturization of ISEs with more optimal analytical characteristics.

Original languageEnglish
Article number5414
Pages (from-to)51-54
Number of pages4
JournalElectrochemistry Communications
Volume55
DOIs
StatePublished - 1 Jun 2015

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Graphite
Charge carriers
Oxides
Graphene
Membranes
Ionophores
Cations
Positive ions
Potentiometric sensors
Nanoparticles
Charged particles
Coulomb interactions
Electrochemical impedance spectroscopy
Nanostructures
Ion-Selective Electrodes

Keywords

  • Electrochemical-impedance spectroscopy
  • Graphene oxide
  • Ion-selective electrodes
  • Potentiometry

Cite this

O'Neil, Glen ; Fouskaki, Maria ; Kounaves, Samuel P. ; Chaniotakis, Nikos A. / The use of graphene oxide as a fixed charge carrier in ion-selective electrodes. In: Electrochemistry Communications. 2015 ; Vol. 55. pp. 51-54.
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The use of graphene oxide as a fixed charge carrier in ion-selective electrodes. / O'Neil, Glen; Fouskaki, Maria; Kounaves, Samuel P.; Chaniotakis, Nikos A.

In: Electrochemistry Communications, Vol. 55, 5414, 01.06.2015, p. 51-54.

Research output: Contribution to journalArticleResearchpeer-review

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T1 - The use of graphene oxide as a fixed charge carrier in ion-selective electrodes

AU - O'Neil, Glen

AU - Fouskaki, Maria

AU - Kounaves, Samuel P.

AU - Chaniotakis, Nikos A.

PY - 2015/6/1

Y1 - 2015/6/1

N2 - Abstract Here we present for the first time the use of graphene oxide nanoparticles as fixed-charge carriers for the development of membrane-based cation selective ion-selective electrodes (ISEs). The GO nanoparticles are dispersed into tetrahydrofuran, and thus easily incorporated into the ISE membrane. The effect of GO concentration on bulk membrane resistance (Rb) is measured using electrochemical impedance spectroscopy, and a significant decrease in Rb is observed with increasing [GO]. The permselectivity of these membranes was investigated using conventional potentiometry, and the results suggest that GO is able to decrease membrane resistance through electrostatic interactions between the negatively charged particles and the positively charged cations. The use of these nanostructures in the pH-sensitive ISE based on ETH-1907 ionophore paves the way to a new method of constructing potentiometric sensors. ISEs with increased lifetimes and stabile potentials could be developed based on these materials, allowing ionophore and charge carrier to be combined in a way that promotes miniaturization of ISEs with more optimal analytical characteristics.

AB - Abstract Here we present for the first time the use of graphene oxide nanoparticles as fixed-charge carriers for the development of membrane-based cation selective ion-selective electrodes (ISEs). The GO nanoparticles are dispersed into tetrahydrofuran, and thus easily incorporated into the ISE membrane. The effect of GO concentration on bulk membrane resistance (Rb) is measured using electrochemical impedance spectroscopy, and a significant decrease in Rb is observed with increasing [GO]. The permselectivity of these membranes was investigated using conventional potentiometry, and the results suggest that GO is able to decrease membrane resistance through electrostatic interactions between the negatively charged particles and the positively charged cations. The use of these nanostructures in the pH-sensitive ISE based on ETH-1907 ionophore paves the way to a new method of constructing potentiometric sensors. ISEs with increased lifetimes and stabile potentials could be developed based on these materials, allowing ionophore and charge carrier to be combined in a way that promotes miniaturization of ISEs with more optimal analytical characteristics.

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