Por favor, use este identificador para citar o enlazar a este item: http://hdl.handle.net/10261/191120
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Título

Reduced graphene oxide-carboxymethylcellulose layered with platinum nanoparticles/PAMAM dendrimer/magnetic nanoparticles hybrids. Application to the preparation of enzyme electrochemical biosensors

AutorBorisova, Boryana; Sánchez, Alfredo; Jiménez-Falcao, Sandra; Martín, Miriam; Salazar, Pedro CSIC ORCID CVN; Parrado, Concepción; Pingarrón, José Manuel; Villalonga, Reynaldo
Palabras claveGraphene
Hybrid nanomaterials
Magnetic nanoparticles
Biosensors
Fish freshness
Fecha de publicaciónsep-2016
EditorElsevier
CitaciónSensors and Actuators - B - Chemical Biochemical Sensors 232: 84-90 (2016)
ResumenThe assembly of a novel layer-by-layer biosensor architecture using hybrid nanomaterials is explored for the construction of an amperometric enzyme biosensors. The nanostructured sensing interface was prepared with poly(dopamine)-modified magnetic nanoparticles which were covalently coated with four-generation ethylenediamine core polyamidoamine G-4 dendrimers and further decorated with platinum nanoparticles. This nanohybrid was fully characterized and further layered on glassy carbon electrodes coated with a graphene oxide-carboxymethylcellulose hybrid nanomaterial through electrostatic interactions. The nanostructured surface was then employed as scaffold for the covalent immobilization of the enzyme xanthine oxidase through a glutaraldehyde-mediated cross-linking. The enzyme electrode allowed the amperometric detection of xanthine in the 50 nM-12 μM range, with a high sensitivity of 140 mA/M cm and low detection limit of 13 nM. The biosensor exhibited high reproducibility and repeatability, and was successfully tested for the quantification of xanthine in fish samples.
Versión del editorhttps://doi.org/10.1016/j.snb.2016.02.106
URIhttp://hdl.handle.net/10261/191120
DOI10.1016/j.snb.2016.02.106
ISSN0925-4005
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