Chemically modified electrodes for recessed microelectrode array

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dc.contributor.author Mohd Said, Nur Azura
dc.contributor.author Ogurtsov, Vladimir I.
dc.contributor.author Twomey, Karen
dc.contributor.author Nagle, Lorraine C.
dc.contributor.author Herzog, G.
dc.date.accessioned 2018-07-12T15:21:11Z
dc.date.available 2018-07-12T15:21:11Z
dc.date.issued 2016
dc.identifier.citation Mohd Said, N. A., Ogurtsov, V. I., Twomey, K., Nagle, L. C. and Herzog, G. (2016) 'Chemically modified electrodes for recessed microelectrode array', Procedia Chemistry, 20, pp. 12-24. DOI: 10.1016/j.proche.2016.07.002 en
dc.identifier.volume 20 en
dc.identifier.startpage 12 en
dc.identifier.endpage 24 en
dc.identifier.issn 1876-6196
dc.identifier.uri http://hdl.handle.net/10468/6454
dc.identifier.doi 10.1016/j.proche.2016.07.002
dc.description.abstract Chemical modifications on recessed microelectrode array, achieved via electrodeposition techniques are reported here. Silicon-based gold microelectrode arrays of 10µm microband and microdisc array were selected and functionalised using sol-gel and nanoporous gold (NPG) respectively. For electrochemically assisted self-assembly (EASA) formati6154on of sol-gel, electrode surface was first pre-treated with a self-assembled partial monolayer of mercaptopropyltrimethoxysilane (MPTMS) before transferring it into the sol containing cetyltrimethyl ammonium bromide (CTAB)/tetraethoxysilane (TEOS):MPTMS (90:10) precursors. A cathodic potential is then applied. It was found that larger current densities were required in ensuring successful film deposition when moving from macro- to micro- dimensions. For NPG modification, a chemical etching process called dealloying was employed. NPG of three different thicknesses have been successfully deposited. All the modified and functionalized microelectrode arrays were characterized by both optical (SEM) and electrochemical analysis (cyclic voltammetry and impedance spectroscopy). An increase in surface area and roughness has been observed and such will benefit for future sensing application. en
dc.format.mimetype application/pdf en
dc.language.iso en en
dc.publisher Elsevier en
dc.relation.ispartof 11th Asian Conference on Chemical Sensors, ACCS 2015, Penang Malaysia, 16-17 November 2015.
dc.relation.uri http://www.sciencedirect.com/science/article/pii/S1876619616300109
dc.rights © 2016 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license https://creativecommons.org/licenses/by-nc-nd/4.0/ en
dc.rights.uri https://creativecommons.org/licenses/by-nc-nd/4.0/ en
dc.subject Electrochemically assisted self-assembly en
dc.subject Mesoporous silica films en
dc.subject Nanoporous gold en
dc.subject Recessed microelectrode array en
dc.subject Electrochemical impedance spectroscopy en
dc.title Chemically modified electrodes for recessed microelectrode array en
dc.type Article (peer-reviewed) en
dc.internal.authorcontactother Lorraine Nagle, Tyndall Microsystems, University College Cork, Cork, Ireland. +353-21-490-3000 Email: lorraine.nagle@tyndall.ie en
dc.internal.availability Full text available en
dc.date.updated 2018-07-12T15:03:42Z
dc.description.version Published Version en
dc.internal.rssid 445081752
dc.contributor.funder Institut Penyelidikan dan Kemajuan Pertanian Malaysia en
dc.description.status Peer reviewed en
dc.identifier.journaltitle Procedia Chemistry en
dc.internal.copyrightchecked Yes en
dc.internal.licenseacceptance Yes en
dc.internal.IRISemailaddress lorraine.nagle@tyndall.ie en


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© 2016 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license https://creativecommons.org/licenses/by-nc-nd/4.0/ Except where otherwise noted, this item's license is described as © 2016 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license https://creativecommons.org/licenses/by-nc-nd/4.0/
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