A nanoporous ruthenium oxide framework for amperometric sensing of glucose and potentiometric sensing of pH

Jun Ho Shim; Minkyung Kang; Youngmi Lee; Chongmok Lee

doi:10.1007/s00604-012-0774-9

A nanoporous ruthenium oxide framework for amperometric sensing of glucose and potentiometric sensing of pH

Jun Ho Shim, Minkyung Kang, Youngmi Lee, Chongmok Lee

Chemistry & Nanoscience

Research output: Contribution to journal › Article › peer-review

16 Scopus citations

Abstract

Nanoporous ruthenium oxide frameworks (L ₂-eRuO) were electrodeposited on gold substrates by repetitive potential cycling in solutions of ruthenium(III) ions in the presence of reverse neutral micelles. The L ₂-eRuO was characterized in terms of direct oxidation of glucose and potentiometric response to pH values. The surface structures and morphologies of the L ₂-eRuO were characterized by scanning electron microscopy, energy dispersive X-ray spectroscopy, Raman spectroscopy, and high-resolution transmission electron microscopy. Their surface area was estimated via underpotential deposition of copper. L ₂-eRuO-modified electrodes showed a 17-fold higher sensitivity (40 μA mM ^-1 cm ^-2 towards glucose in 0-4 mM concentration in solution of pH 7.4) than a RuO electrode prepared in the absence of reverse micelles. Potential interferents such as ascorbic acid, 4-acetamidophenol, uric acid and dopamine displayed no effect. The new electrode also revealed improved potentiometric response to pH changes compared to a platinum electrode of the same type.

Original language	English
Pages (from-to)	211-219
Number of pages	9
Journal	Microchimica Acta
Volume	177
Issue number	1-2
DOIs	https://doi.org/10.1007/s00604-012-0774-9
State	Published - Apr 2012

Keywords

Copper underpotential deposition
Nanoporous ruthenium structures
Nonenzymatic amperometric glucose sensor
Potentiometric pH sensing

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10.1007/s00604-012-0774-9

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title = "A nanoporous ruthenium oxide framework for amperometric sensing of glucose and potentiometric sensing of pH",

abstract = "Nanoporous ruthenium oxide frameworks (L 2-eRuO) were electrodeposited on gold substrates by repetitive potential cycling in solutions of ruthenium(III) ions in the presence of reverse neutral micelles. The L 2-eRuO was characterized in terms of direct oxidation of glucose and potentiometric response to pH values. The surface structures and morphologies of the L 2-eRuO were characterized by scanning electron microscopy, energy dispersive X-ray spectroscopy, Raman spectroscopy, and high-resolution transmission electron microscopy. Their surface area was estimated via underpotential deposition of copper. L 2-eRuO-modified electrodes showed a 17-fold higher sensitivity (40 μA mM -1 cm -2 towards glucose in 0-4 mM concentration in solution of pH 7.4) than a RuO electrode prepared in the absence of reverse micelles. Potential interferents such as ascorbic acid, 4-acetamidophenol, uric acid and dopamine displayed no effect. The new electrode also revealed improved potentiometric response to pH changes compared to a platinum electrode of the same type.",

keywords = "Copper underpotential deposition, Nanoporous ruthenium structures, Nonenzymatic amperometric glucose sensor, Potentiometric pH sensing",

author = "Shim, {Jun Ho} and Minkyung Kang and Youngmi Lee and Chongmok Lee",

note = "Funding Information: This research was supported by Basic Reaserch Program through the National Reasearch Foundation of Korea (NRF) funded by the Ministry of Education, Science and Technology (2011–0009741). This work was also supported by Mid-career Researcher Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education, Science and Technology (2011–0015619).",

year = "2012",

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doi = "10.1007/s00604-012-0774-9",

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AU - Shim, Jun Ho

AU - Kang, Minkyung

AU - Lee, Youngmi

AU - Lee, Chongmok

N1 - Funding Information: This research was supported by Basic Reaserch Program through the National Reasearch Foundation of Korea (NRF) funded by the Ministry of Education, Science and Technology (2011–0009741). This work was also supported by Mid-career Researcher Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education, Science and Technology (2011–0015619).

PY - 2012/4

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N2 - Nanoporous ruthenium oxide frameworks (L 2-eRuO) were electrodeposited on gold substrates by repetitive potential cycling in solutions of ruthenium(III) ions in the presence of reverse neutral micelles. The L 2-eRuO was characterized in terms of direct oxidation of glucose and potentiometric response to pH values. The surface structures and morphologies of the L 2-eRuO were characterized by scanning electron microscopy, energy dispersive X-ray spectroscopy, Raman spectroscopy, and high-resolution transmission electron microscopy. Their surface area was estimated via underpotential deposition of copper. L 2-eRuO-modified electrodes showed a 17-fold higher sensitivity (40 μA mM -1 cm -2 towards glucose in 0-4 mM concentration in solution of pH 7.4) than a RuO electrode prepared in the absence of reverse micelles. Potential interferents such as ascorbic acid, 4-acetamidophenol, uric acid and dopamine displayed no effect. The new electrode also revealed improved potentiometric response to pH changes compared to a platinum electrode of the same type.

AB - Nanoporous ruthenium oxide frameworks (L 2-eRuO) were electrodeposited on gold substrates by repetitive potential cycling in solutions of ruthenium(III) ions in the presence of reverse neutral micelles. The L 2-eRuO was characterized in terms of direct oxidation of glucose and potentiometric response to pH values. The surface structures and morphologies of the L 2-eRuO were characterized by scanning electron microscopy, energy dispersive X-ray spectroscopy, Raman spectroscopy, and high-resolution transmission electron microscopy. Their surface area was estimated via underpotential deposition of copper. L 2-eRuO-modified electrodes showed a 17-fold higher sensitivity (40 μA mM -1 cm -2 towards glucose in 0-4 mM concentration in solution of pH 7.4) than a RuO electrode prepared in the absence of reverse micelles. Potential interferents such as ascorbic acid, 4-acetamidophenol, uric acid and dopamine displayed no effect. The new electrode also revealed improved potentiometric response to pH changes compared to a platinum electrode of the same type.

KW - Copper underpotential deposition

KW - Nanoporous ruthenium structures

KW - Nonenzymatic amperometric glucose sensor

KW - Potentiometric pH sensing

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A nanoporous ruthenium oxide framework for amperometric sensing of glucose and potentiometric sensing of pH

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