Electrochemical, spectroscopic and electrochemiluminescent characterization of self-assembled 3-aminopropyltriethoxysilane/CdTe quantum dots hybrids on screen-printed electrodes

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dc.contributor.authorGarcía, Camilo
dc.contributor.authorNavarro, Freddy
dc.contributor.authorCelis, Freddy
dc.contributor.authorRuiz, Domingo
dc.contributor.authorToledo, Sofía
dc.contributor.authorSanhueza, Luis
dc.contributor.authorQuiñones, Arturo
dc.contributor.authorAguirre, María J.
dc.date2018
dc.date.accessioned2019-11-13T16:22:12Z
dc.date.available2019-11-13T16:22:12Z
dc.date.issued2019-11-13
dc.description.abstractThis work describes the electrochemical, spectroscopic and electrochemiluminescent (ECL) characterization of graphite screen-printed electrodes (SPE) modified with a multilayer electrostatic assembly between 3-aminopropyltriethoxysilane (APTES) and CdTe quantum dots stabilized with glutathione (GSH) as the cationic and the negative layers, respectively. The characterization of the obtained system was performed by cyclic voltammetry, electrochemical impedance spectroscopy, scanning electron microscopy and Raman spectroscopy, which confirm the homogeneous presence of CdTe quantum dots on the multilayer assembly. The electrochemiluminescent properties were measured in a potentiostat coupled with a photodiode detector, showing stable and repetitive electrochemiluminescent signals. The ECL response was studied using potassium persulfate and hydrogen peroxide as co-reactants, and the measurements were carried out at different scan rates, pH values and concentrations. The ECL properties of the studied system at specific experimental conditions demonstrated different mechanisms by changing the co-reactants associated with the electrochemical step to generate the radical species and its interaction with the SPE/APTES/CdTe (GSH) reduced system, obtaining a more intense ECL signal with H2O2 than with S2O82-. Some analytical parameters, such as the linear range and the limit of detection for SPE/APTES/CdTe (GSH) in ECL H2O2 detection, were obtainedes_ES
dc.formatPDFes_ES
dc.identifier.citationElectrochimica Acta, Vol.276, N° 64-72, 2018
dc.identifier.doi10.1016/j.electacta.2018.04.147es_ES
dc.identifier.urihttp://repositoriodigital.uct.cl/handle/10925/2080
dc.language.isoenes_ES
dc.sourceElectrochimica Acta, Vol.276, N° 64-72, 2018es_ES
dc.subjectElectrochemiluminescentes_ES
dc.subjectElectrochemicales_ES
dc.subjectSpectroscopyes_ES
dc.titleElectrochemical, spectroscopic and electrochemiluminescent characterization of self-assembled 3-aminopropyltriethoxysilane/CdTe quantum dots hybrids on screen-printed electrodeses_ES
dc.typeArtículo de Revistaes_ES
uct.catalogadorpopes_ES
uct.comunidadRecursos Naturaleses_ES
uct.facultadFacultad de Recursos Naturaleses_ES
uct.indizacionISI - Science Citation Indexes_ES
uct.indizacionSCOPUSes_ES
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