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Título del libro: 2014 Ieee 9th Iberoamerican Congress On Sensors, Ibersensor 2014 - Conference Proceedings
Título del capítulo: Electrochemical detection of hydrogen peroxide and glucose based on chitosan stabilized silver nanowire modified electrodes

Autores UNAM:
SIVA KUMAR KRISHNAN;
Autores externos:

Idioma:
Inglés
Año de publicación:
2014
Palabras clave:

Carbon; Chemical detection; Chitosan; Electric resistance measurement; Enzyme electrodes; Glass; Glass membrane electrodes; Glucose; Glucose oxidase; Glucose sensors; Hydrogen peroxide; Oxidation; Peroxides; Silver; Silver nanowires; Catalytic performance; Electrocatalytic materials; ELectrochemical detection; Glucose biosensor; Glucose concentration; Glucose oxidases (GOx); Modified electrodes; Modified glassy carbon electrode; Silver compounds


Resumen:

The electrochemical detection of H2O2 and glucose based upon chitosan-stabilized silver nanowires (CS-AgNWs) onto a modified glassy carbon electrode is demonstrated. AgNWs synthesized through polyol process with high yield were used as electrocatalytic material to construct the modified electrode. CS-AgNWs modified glassy carbon electrode without enzyme (CS-AgNWs/GCE) exhibits excellent catalytic performance toward H2O2 reduction with sensitivity of 24.34 µAmM-1cm-2. Furthermore, the enzyme electrode prepared by immobilizing glucose oxidase (GOx)n the CS-AgNWs (CS-AgNWs/GOx/GCE) exhibits well defined redox peaks at -0.65 V. Peak current increases with increasing the glucose concentration from 1 to 12 mM with sensitivity to glucose of 14.6 µAmM-1cm-2. Consequently, this CS-AgNWs modified electrode is a promising candidate for H2O2 sensor and enzyme-based glucose biosensors. © 2014 IEEE.


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