Electrochemical formation of nanoporosity in n-InP anodes in KOH

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dc.contributor.authorBuckley, D. Noel
dc.contributor.authorO'Dwyer, Colm
dc.contributor.authorLynch, Robert P.
dc.contributor.authorQuill, Nathan
dc.contributor.funderScience Foundation Irelanden
dc.date.accessioned2013-02-26T12:26:46Z
dc.date.available2013-02-26T12:26:46Z
dc.date.copyright2011
dc.date.issued2011-01
dc.date.updated2012-11-29T17:26:38Z
dc.description.abstractWe review our recent work on anodic formation of nanoporosity in n-InP in aqueous KOH. Typically, a nanoporous sub-surface region is formed beneath a thin, dense near-surface layer. Atomic force microscopy (AFM) shows pit formation on the surface in the earlier stages of etching, and transmission electron microscopy (TEM) shows individual nanoporous domains separated from the surface by a thin InP layer. Each domain develops from a surface pit. We developed a model based on propagation of pores along the <111>A directions. The model predicts porous domains with a truncated tetrahedral shape and this was confirmed by scanning electron microscopy (SEM) and TEM. Pores are cylindrical and have well-developed facets only near their tips. No porous layers are observed at a KOH concentration of 1.1 mol dm -2 or lower. Linear sweep voltammograms (LSVs) show a pronounced anodic peak corresponding to the formation of the porous region. We describe a technique to deconvolute the effects of potential and time in LSVs and explain their shape and their relationship to porous layer formation.en
dc.description.statusPeer revieweden
dc.description.versionAccepted Versionen
dc.format.mimetypeapplication/pdfen
dc.identifier.citationBuckley, D. N.,O'Dwyer, C.,Lynch, R. P.,Quill, N. (2011) 'Electrochemical Formation of Nanoporosity in n-InP Anodes in KOH'. ECS Trans, 35(8), pp.29-48. doi: 10.1149/1.3567735en
dc.identifier.doi10.1149/1.3567735
dc.identifier.endpage48en
dc.identifier.issn1938-5862
dc.identifier.issn1938-6737
dc.identifier.issued8en
dc.identifier.journaltitleECS Transactionsen
dc.identifier.startpage29en
dc.identifier.urihttps://hdl.handle.net/10468/990
dc.identifier.volume35en
dc.language.isoenen
dc.publisherThe Electrochemical Societyen
dc.relation.urihttp://ecst.ecsdl.org/content/35/8/29
dc.rights© The Electrochemical Society, Inc. 2011. 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 Buckley, D. N.,O'Dwyer, C.,Lynch, R. P.,Quill, N. (2011) 'Electrochemical Formation of Nanoporosity in n-InP Anodes in KOH'. ECS Trans, 35(8), pp.29-48. doi: 10.1149/1.3567735en
dc.subjectNanoporosityen
dc.subjectAtomic force microscopy (AFM)en
dc.subjectTransmission electron microscopy (TEM)en
dc.subjectScanning electron microscopy (SEM)en
dc.subjectLinear sweep voltammogram (LSV)en
dc.subject.lcshElectrochemistryen
dc.titleElectrochemical formation of nanoporosity in n-InP anodes in KOHen
dc.typeArticle (peer-reviewed)en
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