Propagation of nanopores and formation of nanoporous domains during anodization of n-InP in KOH

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dc.contributor.author Buckley, D. Noel
dc.contributor.author Lynch, Robert P.
dc.contributor.author Quill, Nathan
dc.contributor.author O'Dwyer, Colm
dc.date.accessioned 2018-07-16T10:51:49Z
dc.date.available 2018-07-16T10:51:49Z
dc.date.issued 2015-10
dc.identifier.citation Buckley, D. N., Lynch, R. P., Quill, N. and O'Dwyer, C. (2015) 'Propagation of Nanopores and Formation of Nanoporous Domains during Anodization of n-InP in KOH', ECS Transactions, 69(14), pp. 17-32. doi: 10.1149/06914.0017ecst en
dc.identifier.volume 69 en
dc.identifier.issued 14 en
dc.identifier.startpage 17 en
dc.identifier.endpage 32 en
dc.identifier.issn 1938-5862
dc.identifier.uri http://hdl.handle.net/10468/6459
dc.identifier.doi 10.1149/06914.0017ecst
dc.description.abstract Anodization of highly doped (1018 cm-3) n-InP in 2 – 5 mol dm-3 KOH under potentiostatic or potentiodynamic conditions results in the formation of a nanoporous sub-surface region. Pores originate from surface pits and an individual, isolated porous domain is formed beneath each pit in the early stages of anodization. Each such domain is separated from the surface by a thin non-porous layer (typically ~40 nm) and is connected to the electrolyte by its pit. Pores emanate from these points along the <111>A crystallographic directions to form domains with the shape of a tetrahedron truncated symmetrically through its center by a plane parallel to the surface of the electrode. We propose a three-step model of electrochemical pore formation: (1) hole generation at pore tips, (2) hole diffusion and (3) electrochemical oxidation of the semiconductor to form etch products. Step 1 determines the overall etch rate. However, if the kinetics of Step 3 are slow relative to Step 2, then etching can occur at preferred crystallographic sites leading to pore propagation in preferential directions. en
dc.description.sponsorship Irish Research Council (PhD scholarships); Science Foundation Ireland (SFI-funded National Access Programme (Project NAP No. 37 and 70)); 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/69/14/17.abstract
dc.rights © 2015 ECS - The Electrochemical Society en
dc.subject Nanopores en
dc.subject Crystallographic directions en
dc.subject Crystallographic sites en
dc.subject Hole diffusion en
dc.subject Hole generation en
dc.subject Pore formation en
dc.subject Potentiodynamic conditions en
dc.subject Potentiostatics en
dc.subject Three step models en
dc.subject Electrochemical oxidation en
dc.subject Electrolytes en
dc.title Propagation of nanopores and formation of nanoporous domains during anodization of n-InP in KOH en
dc.type Article (peer-reviewed) 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 2018-06-11T21:26:23Z
dc.description.version Accepted Version en
dc.internal.rssid 320376924
dc.contributor.funder Irish Research Council en
dc.contributor.funder FP7 People: Marie-Curie Actions en
dc.contributor.funder Science Foundation Ireland en
dc.description.status Peer reviewed en
dc.identifier.journaltitle ECS Transactions en
dc.internal.copyrightchecked Yes en
dc.internal.licenseacceptance Yes en
dc.internal.IRISemailaddress c.odwyer@ucc.ie en
dc.relation.project info:eu-repo/grantAgreement/EC/FP7::SP3::PEOPLE/229520/EU/IRCSET International Mobility Fellowships in Science Engineering and Technology: co-funded by Marie Curie Actions/INSPIRE en


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