Dual electrochemical microsensor for simultaneous measurements of nitric oxide and oxygen: Fabrication and characterization

Sarah S. Park; Clarissa E. Tatum; Youngmi Lee

doi:10.1016/j.elecom.2009.08.047

Dual electrochemical microsensor for simultaneous measurements of nitric oxide and oxygen: Fabrication and characterization

Sarah S. Park, Clarissa E. Tatum, Youngmi Lee

Department of Chemistry & Nanoscience

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

14 Scopus citations

Abstract

A planar-type amperometric dual microsensor was developed for the simultaneous measurement of the nitric oxide (NO) and oxygen (O₂) concentrations. The sensor (overall diameter = ∼500 μm) consisted of a dual working electrode (WE) containing two platinized platinum microdisks (25 μm diameter, WE1, WE2, distance between two disks > ∼330 μm) and a Ag/AgCl wire reference electrode covered with an expanded poly(tetrafluoroethylene) gas-permeable membrane. The differentiation and concurrent measurements of NO and O₂ were obtained successfully using two sensing WEs with different applied potentials (+0.75 V for WE1 and -0.4 V for WE2). Cross-talk between WE1 and WE2 was eliminated with an optimized internal solution composition. Linear dynamic range, selectivity, sensitivity, detection limit (<5 nM for NO; <500 nM for O₂), and stability (>50 h) were evaluated.

Original language	English
Pages (from-to)	2040-2043
Number of pages	4
Journal	Electrochemistry Communications
Volume	11
Issue number	10
DOIs	https://doi.org/10.1016/j.elecom.2009.08.047
State	Published - Oct 2009

Bibliographical note

Funding Information:
This research was carried out under the General R/D Program of the Daegu Gyeongbuk Institute of Science and Technology (DGIST) , funded by Ministry of Education, Science and Technology (MEST) of the Republic of Korea.

Keywords

Amperometry
Cross-talk
Dual microsensor
Nitric oxide
Oxygen

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10.1016/j.elecom.2009.08.047

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title = "Dual electrochemical microsensor for simultaneous measurements of nitric oxide and oxygen: Fabrication and characterization",

abstract = "A planar-type amperometric dual microsensor was developed for the simultaneous measurement of the nitric oxide (NO) and oxygen (O2) concentrations. The sensor (overall diameter = ∼500 μm) consisted of a dual working electrode (WE) containing two platinized platinum microdisks (25 μm diameter, WE1, WE2, distance between two disks > ∼330 μm) and a Ag/AgCl wire reference electrode covered with an expanded poly(tetrafluoroethylene) gas-permeable membrane. The differentiation and concurrent measurements of NO and O2 were obtained successfully using two sensing WEs with different applied potentials (+0.75 V for WE1 and -0.4 V for WE2). Cross-talk between WE1 and WE2 was eliminated with an optimized internal solution composition. Linear dynamic range, selectivity, sensitivity, detection limit (<5 nM for NO; <500 nM for O2), and stability (>50 h) were evaluated.",

keywords = "Amperometry, Cross-talk, Dual microsensor, Nitric oxide, Oxygen",

author = "Park, {Sarah S.} and Tatum, {Clarissa E.} and Youngmi Lee",

note = "Funding Information: This research was carried out under the General R/D Program of the Daegu Gyeongbuk Institute of Science and Technology (DGIST) , funded by Ministry of Education, Science and Technology (MEST) of the Republic of Korea.",

year = "2009",

month = oct,

doi = "10.1016/j.elecom.2009.08.047",

language = "English",

volume = "11",

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journal = "Electrochemistry Communications",

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T2 - Fabrication and characterization

AU - Park, Sarah S.

AU - Tatum, Clarissa E.

AU - Lee, Youngmi

N1 - Funding Information: This research was carried out under the General R/D Program of the Daegu Gyeongbuk Institute of Science and Technology (DGIST) , funded by Ministry of Education, Science and Technology (MEST) of the Republic of Korea.

PY - 2009/10

Y1 - 2009/10

N2 - A planar-type amperometric dual microsensor was developed for the simultaneous measurement of the nitric oxide (NO) and oxygen (O2) concentrations. The sensor (overall diameter = ∼500 μm) consisted of a dual working electrode (WE) containing two platinized platinum microdisks (25 μm diameter, WE1, WE2, distance between two disks > ∼330 μm) and a Ag/AgCl wire reference electrode covered with an expanded poly(tetrafluoroethylene) gas-permeable membrane. The differentiation and concurrent measurements of NO and O2 were obtained successfully using two sensing WEs with different applied potentials (+0.75 V for WE1 and -0.4 V for WE2). Cross-talk between WE1 and WE2 was eliminated with an optimized internal solution composition. Linear dynamic range, selectivity, sensitivity, detection limit (<5 nM for NO; <500 nM for O2), and stability (>50 h) were evaluated.

AB - A planar-type amperometric dual microsensor was developed for the simultaneous measurement of the nitric oxide (NO) and oxygen (O2) concentrations. The sensor (overall diameter = ∼500 μm) consisted of a dual working electrode (WE) containing two platinized platinum microdisks (25 μm diameter, WE1, WE2, distance between two disks > ∼330 μm) and a Ag/AgCl wire reference electrode covered with an expanded poly(tetrafluoroethylene) gas-permeable membrane. The differentiation and concurrent measurements of NO and O2 were obtained successfully using two sensing WEs with different applied potentials (+0.75 V for WE1 and -0.4 V for WE2). Cross-talk between WE1 and WE2 was eliminated with an optimized internal solution composition. Linear dynamic range, selectivity, sensitivity, detection limit (<5 nM for NO; <500 nM for O2), and stability (>50 h) were evaluated.

KW - Amperometry

KW - Cross-talk

KW - Dual microsensor

KW - Nitric oxide

KW - Oxygen

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DO - 10.1016/j.elecom.2009.08.047

M3 - Article

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SN - 1388-2481

VL - 11

SP - 2040

EP - 2043

JO - Electrochemistry Communications

JF - Electrochemistry Communications

IS - 10

ER -

Dual electrochemical microsensor for simultaneous measurements of nitric oxide and oxygen: Fabrication and characterization

Abstract

Bibliographical note

Keywords

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