Show simple item record

dc.contributor.authorCOEY, JOHN MICHAEL DAVID
dc.date.accessioned2009-08-14T12:49:39Z
dc.date.available2009-08-14T12:49:39Z
dc.date.issued2004
dc.date.submitted2004en
dc.identifier.citationMhiochain TRN, Coey JMD 'Chirality of electrodeposits grown in a magnetic field' in Physical Review E, 69, 6 (1), 2004, pp 061404-1 - 061404-10en
dc.identifier.otherYen
dc.identifier.otherY
dc.identifier.urihttp://hdl.handle.net/2262/31830
dc.descriptionPUBLISHEDen
dc.description.abstractElectrodeposits grown around a point cathode in a flat, horizontal electrochemical cell have fractal form. When grown in the presence of a perpendicular applied magnetic field, the deposits develop a spiral structure with chirality which reverses on switching the field direction. These structures are modeled numerically using biased variants of the diffusion limited aggregation (DLA) model. The effects of electric and magnetic fields are modeled successfully by varying the probabilities that a random walker will move in a given direction as a result of a Coulomb force and the Lorentz force-induced flow of electrolyte past the deposit surface. By contrast, a numerical model which considers only the effect of the Lorentz force on individual ions, without reference to the surface of the growing deposit, produces spiral structures with incorrect chirality. The modified DLA model is related to the differential equations for diffusion, migration, and convection. Length scales in the problem are understood by associating the step length of the random walker with the diffusion layer thickness, the lookup radius with the hydrodynamic boundary layer thickness and a point on the numerical deposit with a nucleation center for growth of a crystallite.en
dc.description.sponsorshipThis work was supported by Science Foundation Ireland as part of the CINSE project.en
dc.format.extent061404-1en
dc.format.extent061404-10en
dc.format.extent621003 bytes
dc.format.mimetypeapplication/pdf
dc.language.isoenen
dc.publisherAmerican Physical Societyen
dc.relation.ispartofseriesPhysical Review Een
dc.relation.ispartofseries69en
dc.relation.ispartofseries6en
dc.rightsYen
dc.subjectPhysicsen
dc.titleChirality of electrodeposits grown in a magnetic fielden
dc.contributor.sponsorScience Foundation Ireland
dc.type.supercollectionscholarly_publicationsen
dc.type.supercollectionrefereed_publicationsen
dc.identifier.peoplefinderurlhttp://people.tcd.ie/jcoey
dc.identifier.rssinternalid7878


Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record