Carbon-nanofiber-based nanocomposite membrane as a highly stable solid-state junction for reference electrodes

Glen O'Neil, Raluca Buiculescu, Samuel P. Kounaves, Nikos A. Chaniotakis

Research output: Contribution to journalArticleResearchpeer-review

8 Citations (Scopus)

Abstract

There is currently a need for a reliable solid-state reference electrode, especially in applications such as autonomous sensing or long-term environmental monitoring. We present here for the first time a novel solid-state nanofiber junction reference electrode (NFJRE) incorporating a junction consisting of poly(methyl methacrylate) and carbon graphene stacked nanofibers. The NFJRE operates by using the membrane polymer junction, which has a very high glass transition temperature (Tg) and small diffusion coefficient, to control the diffusion of ions, and the carbon nanofibers lower the junction resistance and act as ion-to-electron transducers. The fabrication of the NFJRE is detailed, and its behavior is characterized in terms of its impedance, stability, and behavior in comparison with traditional reference electrodes. The NFJRE showed a response of <5-13 mV toward a variety of electrolyte solutions from 10-5 to 10-2 M, <10 mV over a pH range of 2-12, and excellent behavior when used with voltammetric methods.

Original languageEnglish
Pages (from-to)5749-5753
Number of pages5
JournalAnalytical Chemistry
Volume83
Issue number14
DOIs
StatePublished - 15 Jul 2011

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Carbon nanofibers
Nanofibers
Nanocomposites
Membranes
Electrodes
Ions
Graphite
Polymethyl Methacrylate
Electrolytes
Transducers
Polymers
Carbon
Fabrication
Electrons
Monitoring

Cite this

O'Neil, Glen ; Buiculescu, Raluca ; Kounaves, Samuel P. ; Chaniotakis, Nikos A. / Carbon-nanofiber-based nanocomposite membrane as a highly stable solid-state junction for reference electrodes. In: Analytical Chemistry. 2011 ; Vol. 83, No. 14. pp. 5749-5753.
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Carbon-nanofiber-based nanocomposite membrane as a highly stable solid-state junction for reference electrodes. / O'Neil, Glen; Buiculescu, Raluca; Kounaves, Samuel P.; Chaniotakis, Nikos A.

In: Analytical Chemistry, Vol. 83, No. 14, 15.07.2011, p. 5749-5753.

Research output: Contribution to journalArticleResearchpeer-review

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AB - There is currently a need for a reliable solid-state reference electrode, especially in applications such as autonomous sensing or long-term environmental monitoring. We present here for the first time a novel solid-state nanofiber junction reference electrode (NFJRE) incorporating a junction consisting of poly(methyl methacrylate) and carbon graphene stacked nanofibers. The NFJRE operates by using the membrane polymer junction, which has a very high glass transition temperature (Tg) and small diffusion coefficient, to control the diffusion of ions, and the carbon nanofibers lower the junction resistance and act as ion-to-electron transducers. The fabrication of the NFJRE is detailed, and its behavior is characterized in terms of its impedance, stability, and behavior in comparison with traditional reference electrodes. The NFJRE showed a response of <5-13 mV toward a variety of electrolyte solutions from 10-5 to 10-2 M, <10 mV over a pH range of 2-12, and excellent behavior when used with voltammetric methods.

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