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Assessment and comparison of surface chemical composition and oxide layer modification upon two different activation methods on a CoCrMo alloy
dc.contributor.author | Paredes, Virginia |
dc.contributor.author | Salvagni, Emiliano |
dc.contributor.author | Rodriguez, Enrique |
dc.contributor.author | Gil Mur, Francisco Javier |
dc.contributor.author | Manero Planella, José María |
dc.contributor.other | Universitat Politècnica de Catalunya. Departament de Ciència dels Materials i Enginyeria Metal·lúrgica |
dc.date.accessioned | 2014-04-28T11:51:54Z |
dc.date.created | 2014 |
dc.date.issued | 2014 |
dc.identifier.citation | Paredes, V. [et al.]. Assessment and comparison of surface chemical composition and oxide layer modification upon two different activation methods on a CoCrMo alloy. "Journal of materials science. Materials in medicine", 2014, vol. 25, p. 311-320. |
dc.identifier.issn | 0957-4530 |
dc.identifier.uri | http://hdl.handle.net/2117/22724 |
dc.description.abstract | This study investigated the effect of two different activation methods on the surface chemical composition of a CoCrMo-alloy. The activation was performed with oxygen plasma (OP) or nitric acid (NA). The surface physical– chemical properties were thoroughly characterized by means of several analytical techniques: X-ray photoelectron spec- troscopy (XPS), time-of-flight secondary ion mass spec- trometry (ToF-SIMS), zinc-complex substitution technique, contact angle, and interferometry. The surface modification was evaluated by assessing contamination removal, the ‘‘active’’ hydroxyl groups (OH-act) present at the surface, the metal oxide ratio (Co y O x - /Cr y O x - ) and changes in the chem- ical composition and topography of the oxide layer. XPS experimental data showed for both methods (OP and NA) a significant decrease of the carbon contents (C 1 s ) associated with contaminants and at the same time changes in the atomic composition of the oxide layer (O 1 s ). In addition, the O 1 s XPS spectra showed differences between the percentage of OH - before and after OP or NA treatment, leading to the conclusion that both methods are effective for surface ‘‘cleaning’’ and activation. These results were further inves- tigated and corroborated by ToF-SIMS analysis and zinc complex substitution technique. The general conclusion was that NA is more efficient in terms of contaminants removal and generation of accessible OH-act present at the surface and without altering the native metal oxide ratio (Co y O x - /Cr y O x - ) considered to be essential for biocompatibility. |
dc.format.extent | 10 p. |
dc.language.iso | eng |
dc.rights | Attribution-NonCommercial-NoDerivs 3.0 Spain |
dc.rights.uri | http://creativecommons.org/licenses/by-nc-nd/3.0/es/ |
dc.subject | Àrees temàtiques de la UPC::Enginyeria dels materials |
dc.title | Assessment and comparison of surface chemical composition and oxide layer modification upon two different activation methods on a CoCrMo alloy |
dc.type | Article |
dc.subject.lemac | Enginyeria de teixits |
dc.subject.lemac | Teixit ossi |
dc.subject.lemac | Implants artificials -- Materials |
dc.contributor.group | Universitat Politècnica de Catalunya. BBT - Biomaterials, Biomecànica i Enginyeria de Teixits |
dc.identifier.doi | 10.1007/s10856-013-5083-2 |
dc.description.peerreviewed | Peer Reviewed |
dc.relation.publisherversion | http://link.springer.com/article/10.1007%2Fs10856-013-5083-2 |
dc.rights.access | Restricted access - publisher's policy |
local.identifier.drac | 13598022 |
dc.description.version | Postprint (published version) |
dc.date.lift | 10000-01-01 |
local.citation.author | Paredes, V.; Salvagni, E.; Rodriguez, E.; Gil, F.J.; Manero, J. |
local.citation.publicationName | Journal of materials science. Materials in medicine |
local.citation.volume | 25 |
local.citation.startingPage | 311 |
local.citation.endingPage | 320 |
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