Effect of electrolyte concentration on anodic nanoporous layer growth for n-InP in aqueous KOH

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dc.contributor.author Lynch, Robert P.
dc.contributor.author O'Dwyer, Colm
dc.contributor.author Buckley, D. Noel
dc.contributor.author Sutton, David
dc.contributor.author Newcomb, Simon B.
dc.date.accessioned 2013-02-27T17:14:42Z
dc.date.available 2013-02-27T17:14:42Z
dc.date.copyright 2006
dc.date.issued 2006-01
dc.identifier.citation Lynch, R., O'Dwyer, C., Buckley, D. N., Sutton, D., Newcomb, S. B. (2006) 'Effect of Electrolyte Concentration on Anodic Nanoporous Layer Growth for n-InP in Aqueous KOH. ECS Transactions 2(5): 131-141; doi:10.1149/1.2204886 en
dc.identifier.volume 2 en
dc.identifier.issued 5 en
dc.identifier.startpage 131 en
dc.identifier.endpage 141 en
dc.identifier.uri http://hdl.handle.net/10468/999
dc.identifier.doi 10.1149/1.2204886
dc.description.abstract The surface morphology and sub-surface porous structure of (100) n-InP following anodization in 1 - 10 mol dm-3 aqueous KOH were studied using linear sweep voltammetry (LSV) in combination with scanning electron microscopy (SEM) and transmission electron microscopy (TEM). LSV of n-InP in 10 mol dm-3 KOH showed a single anodic current peak at 0.41 V. As the concentration of electrolyte was decreased, the peak increased in current density and charge and shifted to more positive potentials; eventually individual peaks were no longer discernable. Porous layers were observed in SEM cross-sections following linear potential sweeps and the porous layer thickness increased significantly with decreasing KOH concentration, reaching a maximum value at ~2.2 mol dm-3. At concentrations less than 1.8 mol dm-3 the layer thickness decreased sharply, pore diameters became wider and pore walls became narrower until eventually, at 1.1 mol dm-2 or lower, no porous layers were observed. It was also observed that the pore width increased and the inter-pore spacing decreased with decreasing concentration. It is proposed that preferential pore propagation occurs along <111> directions, contrary to previous suggestions, and that the resulting anoporous domains, initially formed, have triangular cross-sections when viewed in one of the {110} cleavage planes, ‘dove-tail’ crosssections viewed in the orthogonal {110} cleavage plane and square profiles when viewed in the (100) plane of the electrode surface. en
dc.format.mimetype application/pdf en
dc.language.iso en en
dc.publisher Electrochemical Society en
dc.relation.uri http://ecst.ecsdl.org/content/2/5/131
dc.rights © The Electrochemical Society, Inc. 2006. All rights reserved. Except as provided under U.S. copyright law, this work may not be reproduced, resold, distributed, or modified without the express permission of The Electrochemical Society (ECS). The archival version of this work was published in Lynch, R., O'Dwyer, C., Buckley, D. N., Sutton, D., Newcomb, S. B. (2006) 'Effect of Electrolyte Concentration on Anodic Nanoporous Layer Growth for n-InP in Aqueous KOH. ECS Transactions 2(5): 131-141; doi:10.1149/1.2204886 en
dc.subject Electrolyte concentration en
dc.subject Surface morphology en
dc.subject Anodization en
dc.subject Aqueous KOH en
dc.subject Linear sweep voltammetry (LSV) en
dc.subject Scanning electron microscopy (SEM) en
dc.subject Transmission electron microscopy (TEM) en
dc.subject.lcsh Electrochemistry en
dc.title Effect of electrolyte concentration on anodic nanoporous layer growth for n-InP in aqueous KOH en
dc.type Article (peer-reviewed) en
dc.internal.authorurl http://research.ucc.ie/profiles/D004/codwyer en
dc.internal.authorcontactother Colm O'Dwyer, Chemistry, University College Cork, Cork, Ireland. +353-21-490-3000 Email: c.odwyer@ucc.ie en
dc.internal.availability Full text available en
dc.date.updated 2012-11-30T09:08:40Z
dc.description.version Accepted Version en
dc.internal.rssid 162343197
dc.contributor.funder Science Foundation Ireland en
dc.description.status Peer reviewed en
dc.identifier.journaltitle ECS Transactions en
dc.internal.copyrightchecked No. CORA - ROMEO and publisher's website. Accepted VErsion and set statement en
dc.internal.licenseacceptance Yes en
dc.internal.IRISemailaddress c.odwyer@ucc.ie en


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