Mostra el registre d'ítem simple
Selective detection of dopamine combining multilayers of conducting polymers with gold nanoparticles
dc.contributor.author | Fabregat Jové, Georgina |
dc.contributor.author | Armelín Diggroc, Elaine Aparecida |
dc.contributor.author | Alemán Llansó, Carlos |
dc.contributor.other | Universitat Politècnica de Catalunya. Departament d'Enginyeria Química |
dc.date.accessioned | 2014-07-15T11:42:27Z |
dc.date.available | 2014-07-15T11:42:27Z |
dc.date.created | 2014-05-01 |
dc.date.issued | 2014-05-01 |
dc.identifier.citation | Fabregat, G.; Armelin, E.; Aleman, C. Selective detection of dopamine combining multilayers of conducting polymers with gold nanoparticles. "Journal of physical chemistry B", 01 Maig 2014, vol. 118, núm. 17, p. 4669-4682. |
dc.identifier.issn | 1520-6106 |
dc.identifier.uri | http://hdl.handle.net/2117/23519 |
dc.description.abstract | Electrodes based on the combination of three-layered films formed by two different conducting polymers and gold nanoparticles have been developed for the selective voltammetric determination of dopamine in mixtures with ascorbic acid and uric acid and human urine samples with real interferents. Voltammetric studies of solution mixtures indicate that electrodes formed by alternated layers of poly(3,4-ethylenedioxithiophene) (internal and external layer) and poly(N-methylpyrrole) (intermediate layer) show the best performance in terms of sensitivity and resolution. Furthermore, the sensitivity of such three-layered electrodes increases only slightly after coating its surface with gold nanoparticles (AuNPs), indicating that the catalytic effect typically played by AuNPs in the oxidation of dopamine is less effective in this case. Electrochemical pretreatments based on the application of consecutive oxidation-reduction cycles to electrodes before the detection process have been found to improve the selectivity without altering the sensitivity. On the other hand, the flux of dopamine to the three-layered surface increases linearly with the scan rate. The detection limit for these electrodes is around 10 µM DA in mixtures with uric acid, ascorbic acid, and cetaminophen, decreasing to 2-3 µM in the absence of such interferents. The utility of three-layered electrodes as sensors has also been demonstrated by determining DA in human samples with real interferents. |
dc.format.extent | 14 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 química |
dc.subject.lcsh | Conducting polymers |
dc.subject.lcsh | Nanoparticles |
dc.subject.other | Engineering controlled terms: Amines |
dc.subject.other | Ascorbic acid |
dc.subject.other | Catalytic oxidation |
dc.subject.other | Conducting polymers |
dc.subject.other | Gold |
dc.subject.other | Metal nanoparticles |
dc.subject.other | Mixtures |
dc.subject.other | Neurophysiology |
dc.title | Selective detection of dopamine combining multilayers of conducting polymers with gold nanoparticles |
dc.type | Article |
dc.subject.lemac | Polímers -- Conductivitat tèrmica |
dc.subject.lemac | Nanopartícules |
dc.contributor.group | Universitat Politècnica de Catalunya. IMEM - Innovació, Modelització i Enginyeria en (BIO) Materials |
dc.identifier.doi | 10.1021/jp412613g |
dc.description.peerreviewed | Peer Reviewed |
dc.relation.publisherversion | http://pubs.acs.org/doi/abs/10.1021/jp412613g |
dc.rights.access | Restricted access - publisher's policy |
local.identifier.drac | 14917262 |
dc.description.version | Postprint (published version) |
dc.date.lift | 10000-01-01 |
local.citation.author | Fabregat, G.; Armelin, E.; Aleman, C. |
local.citation.publicationName | Journal of physical chemistry B |
local.citation.volume | 118 |
local.citation.number | 17 |
local.citation.startingPage | 4669 |
local.citation.endingPage | 4682 |
Fitxers d'aquest items
Aquest ítem apareix a les col·leccions següents
-
Articles de revista [398]
-
Articles de revista [2.226]