Glassy Carbon Electrodes Modified with Multiwall Carbon Nanotubes Dispersed in Polylysine
2008; Wiley; Volume: 20; Issue: 15 Linguagem: Inglês
10.1002/elan.200804259
ISSN1521-4109
AutoresYamile Jalit, Marcela C. Rodrı́guez, María D. Rubianes, Soledad Bollo, Gustavo A. Rivas,
Tópico(s)Conducting polymers and applications
ResumoElectroanalysisVolume 20, Issue 15 p. 1623-1631 Full Paper Glassy Carbon Electrodes Modified with Multiwall Carbon Nanotubes Dispersed in Polylysine Yamile Jalit, Yamile Jalit INFIQC, Departamento de Físico Química, Facultad de Ciencias Químicas, Universidad Nacional de Córdoba, Ciudad Universitaria, 5000 Córdoba, ArgentinaSearch for more papers by this authorMarcela C. Rodríguez, Marcela C. Rodríguez INFIQC, Departamento de Físico Química, Facultad de Ciencias Químicas, Universidad Nacional de Córdoba, Ciudad Universitaria, 5000 Córdoba, ArgentinaSearch for more papers by this authorMaría D. Rubianes, María D. Rubianes INFIQC, Departamento de Físico Química, Facultad de Ciencias Químicas, Universidad Nacional de Córdoba, Ciudad Universitaria, 5000 Córdoba, ArgentinaSearch for more papers by this authorSoledad Bollo, Soledad Bollo Laboratorio de Bioelectroquímica, Facultad de Ciencias Químicas y Farmacéuticas, Universidad de Chile, Santiago, ChileSearch for more papers by this authorGustavo A. Rivas, Gustavo A. Rivas [email protected] INFIQC, Departamento de Físico Química, Facultad de Ciencias Químicas, Universidad Nacional de Córdoba, Ciudad Universitaria, 5000 Córdoba, ArgentinaSearch for more papers by this author Yamile Jalit, Yamile Jalit INFIQC, Departamento de Físico Química, Facultad de Ciencias Químicas, Universidad Nacional de Córdoba, Ciudad Universitaria, 5000 Córdoba, ArgentinaSearch for more papers by this authorMarcela C. Rodríguez, Marcela C. Rodríguez INFIQC, Departamento de Físico Química, Facultad de Ciencias Químicas, Universidad Nacional de Córdoba, Ciudad Universitaria, 5000 Córdoba, ArgentinaSearch for more papers by this authorMaría D. Rubianes, María D. Rubianes INFIQC, Departamento de Físico Química, Facultad de Ciencias Químicas, Universidad Nacional de Córdoba, Ciudad Universitaria, 5000 Córdoba, ArgentinaSearch for more papers by this authorSoledad Bollo, Soledad Bollo Laboratorio de Bioelectroquímica, Facultad de Ciencias Químicas y Farmacéuticas, Universidad de Chile, Santiago, ChileSearch for more papers by this authorGustavo A. Rivas, Gustavo A. Rivas [email protected] INFIQC, Departamento de Físico Química, Facultad de Ciencias Químicas, Universidad Nacional de Córdoba, Ciudad Universitaria, 5000 Córdoba, ArgentinaSearch for more papers by this author First published: 23 July 2008 https://doi.org/10.1002/elan.200804259Citations: 35AboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Abstract We report the analytical performance of glassy carbon electrodes (GCE) modified with a dispersion of multiwall carbon nanotubes (MWCNT) in polylysine (Plys) (GCE/MWCNT-Plys). The resulting electrodes show an excellent electrocatalytic activity towards different bioanalytes like ascorbic acid, uric acid and hydrogen peroxide, with important decrease in their oxidation overvoltages. The dispersion of 1.0 mg/mL MWCNT in 1.0 mg/mL polylysine is highly stable, since after 2 weeks the sensitivity for hydrogen peroxide at GCE modified with this dispersion remained in a 90% of the original value. The MWCNT-Plys layer immobilized on glassy carbon electrodes has been also used as a platform to build supramolecular architectures by self-assembling of polyelectrolytes based on the polycationic nature of the polylysine used to disperse the nanotubes. The self-assembling of glucose oxidase has allowed us to obtain a supramolecular multistructure for glucose biosensing. The influence of glucose oxidase concentration and adsorption time as well as the effect of using polylysine or MWCNT-Plys as polycationic layers for further adsorption of GOx is also evaluated. Citing Literature Volume20, Issue15August 2008Pages 1623-1631 RelatedInformation
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