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Screen-printable porous glass: a new material for electrochemical sensors

Screen-printable porous glass: a new material for electrochemical sensors
Screen-printable porous glass: a new material for electrochemical sensors
A screen-printable porous paste is described. Its use in the development of a solid-state Ag/AgCl electrochemical reference electrode is reported as an example of a typical application. Potassium chloride salt crystals are homogenously dispersed in a commercial thick-film glass paste and printed through a stainless steel stencil. Printed features are fired at 600 °C; a lower temperature than the melting point of the salt crystals, which remain intact. After firing, embedded salt crystals are dissolved away in warm water. The resultant features have a sponge-like appearance, with pore density and size distribution governed by the volume and grain sizes of the salt. In the application described, the porous paste is used as an electrolyte containment structure and membrane support scaffold; key components for miniaturisation of the Ag/AgCl reference electrode. Experiments show the best performing reference electrode maintained a potential with <5 % change over more than five decades of chloride concentration
4557-4564
Cranny, Andy
2ebc2ccb-7d3e-4a6a-91ac-9f089741939e
Harris, N.R.
237cfdbd-86e4-4025-869c-c85136f14dfd
White, N.M.
c7be4c26-e419-4e5c-9420-09fc02e2ac9c
Cranny, Andy
2ebc2ccb-7d3e-4a6a-91ac-9f089741939e
Harris, N.R.
237cfdbd-86e4-4025-869c-c85136f14dfd
White, N.M.
c7be4c26-e419-4e5c-9420-09fc02e2ac9c

Cranny, Andy, Harris, N.R. and White, N.M. (2015) Screen-printable porous glass: a new material for electrochemical sensors. Journal of Materials Science: Materials in Electronics, 26 (7), 4557-4564. (doi:10.1007/s10854-015-2925-3).

Record type: Article

Abstract

A screen-printable porous paste is described. Its use in the development of a solid-state Ag/AgCl electrochemical reference electrode is reported as an example of a typical application. Potassium chloride salt crystals are homogenously dispersed in a commercial thick-film glass paste and printed through a stainless steel stencil. Printed features are fired at 600 °C; a lower temperature than the melting point of the salt crystals, which remain intact. After firing, embedded salt crystals are dissolved away in warm water. The resultant features have a sponge-like appearance, with pore density and size distribution governed by the volume and grain sizes of the salt. In the application described, the porous paste is used as an electrolyte containment structure and membrane support scaffold; key components for miniaturisation of the Ag/AgCl reference electrode. Experiments show the best performing reference electrode maintained a potential with <5 % change over more than five decades of chloride concentration

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Submitted date: 30 January 2015
Accepted/In Press date: 6 March 2015
e-pub ahead of print date: 13 March 2015
Published date: July 2015
Organisations: EEE

Identifiers

Local EPrints ID: 375457
URI: http://eprints.soton.ac.uk/id/eprint/375457
PURE UUID: 2e65115c-4dbe-4b0c-b2d6-619ea7fc6425
ORCID for N.R. Harris: ORCID iD orcid.org/0000-0003-4122-2219
ORCID for N.M. White: ORCID iD orcid.org/0000-0003-1532-6452

Catalogue record

Date deposited: 26 Mar 2015 14:22
Last modified: 15 Jul 2020 00:25

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Contributors

Author: Andy Cranny
Author: N.R. Harris ORCID iD
Author: N.M. White ORCID iD

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