Metal oxide sensors for long term pH monitoring
Metal oxide sensors for long term pH monitoring
The determination of pH, a measure of concentration of hydrogen ions in a solution, is an important task in analytical chemistry since various biological and chemical reaction mechanisms are pH dependent. While the conventional glass type electrodes are widely used for their high accuracy; they are not amenable to miniaturization, and suffer from sluggish response [1], [2], [3]. Various solid-state metal oxide pH sensing electrodes, chiefly iridium oxide and ruthenium oxide (RuOx), have been investigated as an alternate. RuOx exhibits several unique advantages over other metal oxides such as thermal stability, excellent corrosion resistance, low hysteresis, low cost and high sensitivity [4]. In this work, we developed and investigated the long-term performance of the RuOx films on platinum electrode. The sensors exhibited near-Nernstian response at 55 mV/pH and long-term stability of over 4 weeks.
Kalsi, Sumit
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Mingels, Roeland
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Lu, Shilong
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Cheong, Ying
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Morgan, Hywel
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29 November 2018
Kalsi, Sumit
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Mingels, Roeland
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Lu, Shilong
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Cheong, Ying
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Morgan, Hywel
de00d59f-a5a2-48c4-a99a-1d5dd7854174
Kalsi, Sumit, Mingels, Roeland, Lu, Shilong, Cheong, Ying and Morgan, Hywel
(2018)
Metal oxide sensors for long term pH monitoring.
NanoBioTech Montreux Conference, , Montreux, Switzerland.
2 pp
.
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Conference or Workshop Item
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Abstract
The determination of pH, a measure of concentration of hydrogen ions in a solution, is an important task in analytical chemistry since various biological and chemical reaction mechanisms are pH dependent. While the conventional glass type electrodes are widely used for their high accuracy; they are not amenable to miniaturization, and suffer from sluggish response [1], [2], [3]. Various solid-state metal oxide pH sensing electrodes, chiefly iridium oxide and ruthenium oxide (RuOx), have been investigated as an alternate. RuOx exhibits several unique advantages over other metal oxides such as thermal stability, excellent corrosion resistance, low hysteresis, low cost and high sensitivity [4]. In this work, we developed and investigated the long-term performance of the RuOx films on platinum electrode. The sensors exhibited near-Nernstian response at 55 mV/pH and long-term stability of over 4 weeks.
Text
NBT_abstract_Metal_oxide_sensors_for_long_term_pH_monitoring
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Published date: 29 November 2018
Venue - Dates:
NanoBioTech Montreux Conference, , Montreux, Switzerland, 2018-10-29
Identifiers
Local EPrints ID: 427026
URI: http://eprints.soton.ac.uk/id/eprint/427026
PURE UUID: d1ab7ed7-3111-4d2e-a349-5a8aa037cd74
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Date deposited: 20 Dec 2018 17:30
Last modified: 16 Mar 2024 03:57
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Contributors
Author:
Sumit Kalsi
Author:
Roeland Mingels
Author:
Shilong Lu
Author:
Hywel Morgan
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