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Haemoglobin smart plastic antibody material tailored with charged binding sites on silica nanoparticles: its application as an ionophore in potentiometric transduction

dc.contributor.authorTavares, Ana P. M.
dc.contributor.authorMoreira, Felismina T. C.
dc.contributor.authorSales, M. Goreti F.
dc.date.accessioned2015-10-15T16:13:47Z
dc.date.available2015-10-15T16:13:47Z
dc.date.issued2013
dc.description.abstractThis work uses surface imprinting to design a novel smart plastic antibodymaterial (SPAM) for Haemoglobin (Hb). Charged binding sites are described here for the first time to tailor plastic antibody nanostructures for a large size protein such as Hb. Its application to design small, portable and low cost potentiometric devices is presented. The SPAM material was obtained by linking Hb to silica nanoparticles and allowing its ionic interaction with charged vinyl monomers. A neutral polymeric matrix was created around these and the imprinted protein removed. Additional materials were designed in parallel acting as a control: a neutral imprinted material (NSPAM), obtained by removing the charged monomers from the procedure, and the Non-Imprinted (NI) versions of SPAM and NSPAM by removing the template. SEM analysis confirmed the surface modification of the silica nanoparticles. All materials were mixed with PVC/plasticizer and applied as selective membranes in potentiometric transduction. Electromotive force (emf) variations were detected only for selective membranes having a lipophilic anionic additive in the membrane. The presence of Hb inside these membranes was evident and confirmed by FTIR, optical microscopy and Raman spectroscopy. The best performance was found for SPAM-based selective membranes with an anionic lipophilic additive, at pH 5. The limits of detection were 43.8 mg mL 1 and linear responses were obtained down to 83.8 mg mL 1, with an average cationic slope of +40 mV per decade. Good selectivity was also observed against other coexisting biomolecules. The analytical application was conducted successfully, showing accurate and precise results.pt_PT
dc.identifier.doi10.1039/C3RA44766A
dc.identifier.urihttp://hdl.handle.net/10400.22/6704
dc.language.isoengpt_PT
dc.publisherRSC Advancespt_PT
dc.relation.publisherversionhttp://pubs.rsc.org/en/content/articlelanding/2013/ra/c3ra44766a/unauth#!divAbstractpt_PT
dc.titleHaemoglobin smart plastic antibody material tailored with charged binding sites on silica nanoparticles: its application as an ionophore in potentiometric transductionpt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPage26219pt_PT
oaire.citation.startPage26210pt_PT
oaire.citation.titleRSC Advancespt_PT
oaire.citation.volume48pt_PT
person.familyNameMoreira
person.givenNameFelismina
person.identifier1589429
person.identifier.ciencia-idC917-6A46-A270
person.identifier.orcid0000-0003-4237-8952
person.identifier.scopus-author-id23486193000
rcaap.rightsopenAccesspt_PT
rcaap.typearticlept_PT
relation.isAuthorOfPublication9c13153d-a73a-49ff-b7f6-c9733bc6725e
relation.isAuthorOfPublication.latestForDiscovery9c13153d-a73a-49ff-b7f6-c9733bc6725e

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