Self-Propelled Micromotors for Naked-Eye Detection of Phenylenediamines Isomers

María-Hormigos, Roberto, Jurado-Sańchez, Beatriz y Escarpa, Alberto . (2018) Self-Propelled Micromotors for Naked-Eye Detection of Phenylenediamines Isomers. Analytical Chemistry; Volumen: 90 (16); Año: 2018; Páginas: 9830-9837

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Título Self-Propelled Micromotors for Naked-Eye Detection of Phenylenediamines Isomers
Autor(es) María-Hormigos, Roberto
Jurado-Sańchez, Beatriz
Escarpa, Alberto
Materia(s) Ciencias
Abstract Tubular micromotors composed of a hybrid single-wall carbon nanotube (SW)−Fe2O3 outer layer and powered by a MnO2 catalyst are used for phenylenediamines isomers detection and discrimination. Catalytic decomposition of H2O2 as fuel results in the production of oxygen bubbles and hydroxyl radicals for phenylenediamines dimerization to produce colorful solutions in colorimetric assays. The combination of Fe2O3 nanoparticles along with the irregular SW backbone results in a rough catalytic layer for enhanced hydroxyl radical production rate and improved analytical sensitivity. Such self-propelled micromotors act as peroxidase-like mobile platforms that offer efficient phenylenediamines detection and discrimination in just 15 min. Factors influencing the colorimetric assay protocol, such as the navigation time and number of motors, have been investigated. Low limits of detection (5 and 6 μM) and quantification (17 and 20 μM) were obtained for o-phenylenediamine and p- phenylenediamine, respectively. The magnetic properties of the outer SW−Fe2O3 hybrid layer allow the reusability of the micromotors in the colorimetric assay. Such attractive performance holds considerable promise for its application in sensing systems in a myriad of environmental, industrial, and health applications.
Editor(es) ACS Publications
Fecha 2018
Formato application/pdf
Identificador bibliuned:DptoCA-FCIE-Articulos-Rmaria-0006
http://e-spacio.uned.es/fez/view/bibliuned:DptoCA-FCIE-Articulos-Rmaria-0006
DOI - identifier https://doi.org/10.1021/acs.analchem.8b01860
ISSN - identifier 1520-6882, 0003-2700
Nombre de la revista Analytical Chemistry
Número de Volumen 90
Número de Issue 16
Página inicial 9830
Página final 9837
Publicado en la Revista Analytical Chemistry; Volumen: 90 (16); Año: 2018; Páginas: 9830-9837
Idioma eng
Versión de la publicación publishedVersion
Tipo de recurso Article
Derechos de acceso y licencia http://creativecommons.org/licenses/by-nc-nd/4.0
info:eu-repo/semantics/openAccess
Tipo de acceso Acceso abierto
Notas adicionales The registered version of this article, first published in Analytical Chemistry, is available online at the publisher's website: ACS Publications, https://doi.org/10.1021/acs.analchem.8b01860
Notas adicionales La versión registrada de este artículo, publicado por primera vez en Analytical Chemistry, está disponible en línea en el sitio web del editor: ACS Publications, https://doi.org/10.1021/acs.analchem.8b01860

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Creado: Wed, 24 Jan 2024, 21:37:31 CET