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Título: | Synergistic Exploitation of the Superoxide Scavenger Properties of Reduced Graphene Oxide and a Trityl Organic Radical for the Impedimetric Sensing of Xanthine |
Autor: | Seber, Gonca CSIC ORCID; Muñoz Martín, José M.; Sandoval, Stefania CSIC ORCID; Rovira, Concepció CSIC ORCID; Tobias, Gerard CSIC ORCID; Mas Torrent, Marta CSIC ORCID; Crivillers, Núria CSIC ORCID | Palabras clave: | Reduced graphene oxide Superoxide anion radical Trityl radical Xanthine sensor |
Fecha de publicación: | 23-ene-2018 | Editor: | Wiley-VCH | Citación: | Advanced Materials Interfaces 5(2): 1701072 (2018) | Resumen: | This work is based on synergetically exploiting the activity of graphene-based materials and trityl free radicals to sense xanthine (X) by their combined scavenging properties for superoxide anion radical (O2•−). For this, reduced graphene oxide (rGO) and rGO covalently functionalized with a perchlorotriphenylmethyl (PTM) radical derivative (rGO@PTM) are synthesized, characterized, and casted on an electrode surface to achieve a highly sensitive electrochemical recognition platform for xanthine determination. The electrochemical analysis is based on impedimetrically monitoring a radical-involved reaction on the graphene-based electrode surface after reacting with such O2•− derived from the xanthine/xanthine oxidase enzymatic system. The presented strategy yields to determine X at nm levels, decreasing the detection limit 100 times with respect to previously reported (bio)sensors. | Versión del editor: | http://dx.doi.org/10.1002/admi.201701072 | URI: | http://hdl.handle.net/10261/161757 | ISSN: | 2196-7350 |
Aparece en las colecciones: | (ICMAB) Artículos |
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