Customized In Situ Functionalization of Nanodiamonds with Nanoparticles for Composite Carbon-Paste Electrodes
Montes Martínez, Raquel (Universitat Autònoma de Barcelona. Departament d'Enginyeria Química, Biològica i Ambiental)
Sánchez, Gerard (Universitat Autònoma de Barcelona. Departament de Química)
Zhao, Jingjing (Universitat Autònoma de Barcelona. Departament de Química)
Palet i Ballús, Cristina (Universitat Autònoma de Barcelona. Departament de Química)
Baeza Labat, Maria del Mar (Universitat Autònoma de Barcelona. Departament de Química)
Bastos Arrieta, Julio (Physical Chemistry TU Dresden)

Data:	2020
Resum:	The incorporation of nanomaterials on (bio)sensors based on composite materials has led to important advances in the analytical chemistry field due to the extraordinary properties that these materials offer. Nanodiamonds (NDs) are a novel type of material that has raised much attention, as they have the possibility of being produced on a large scale by relatively inexpensive synthetic methodologies. Moreover, NDs can present some other interesting features, such as fluorescence, due to surface functionalization and proved biocompatibility, which makes them suitable for biomedical applications. In addition, NDs can be customized with metallic nanoparticles (NPs), such as silver or gold, in order to combine the features of both. Raw NDs were used as modifiers of sensors due to the electrocatalytic effect of the sp 2 and oxygenated species present on their surface. The aim of this research work is evaluating the applicability of NDs modified with silver (Ag@NDs) and gold (Au@NDs) nanoparticles for the development of a suitable (bio)sensing platform. A complete morphological and electrochemical characterization as a function of the prepared nanocomposite composition was performed in order to improve the electroanalytical properties of the developed (bio)sensors. In the present work, the optimal composition for Au@NDs present on the nanocomposite matrix is 3. 5% and the one for Ag@NDs is 1%. Good results were obtained in the evaluation of the optimal composition towards hydrogen peroxide and glucose as a model analyte using a (bio)sensor based on graphite-epoxy-Ag@NDs (17:82:1).
Ajuts:	Agencia Estatal de Investigación RTI2018-099362-B-C21
Drets:	Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, fins i tot amb finalitats comercials, sempre i quan es reconegui l'autoria de l'obra original.
Llengua:	Anglès
Document:	Article ; recerca ; Versió publicada
Matèria:	Carbon nanostructures ; Nanodiamonds ; Graphite ; Optimal composition ; Metal nanoparticles ; Electrochemical (bio)sensor ; Surface functionalization
Publicat a:	Nanomaterials, Vol. 10, Issue 6 (June 2020) , art. 1179, ISSN 2079-4991

DOI: 10.3390/nano10061179
PMID: 32560355

15 p, 2.7 MB

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