Functionalization of niobium electrodes for the construction of impedimetric biosensors

 
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2008 (EN)
Functionalization of niobium electrodes for the construction of impedimetric biosensors (EN)

Helali, S. (EN)

Πανεπιστήμιο Ιωαννίνων. Σχολή Θετικών Επιστημών. Τμήμα Χημείας (EL)
Helali, S. (EN)

This paper describes the development of an impedimetric immunosensor, based on niobium/niobium oxide (Nb[NbOxHy) electrodes, for the detection of atrazine. Niobium oxide was anodically formed onto niobium electrodes at 25 V in 1 M H2SO4. Hydrous oxide layers were then silanized with APTES, and using glutaraldehyde as a cross linker, Fab fragment k47 antibody was covalently immobilized onto the surface of the electrodes. Electrochemical impedance spectroscopy (EIS) was used to characterize the building-up of the immunosensors as well as the binding of atrazine to its specific antibody. In presence of ferricyanide redox species and under a cathodic polarization voltage (-1.2 V versus SCE), the relationship between the concentration of atrazine and the change of the electron transfer resistance value was studied. (c) 2007 Elsevier B.V. All rights reserved. (EN)

atrazine (EN)

Πανεπιστήμιο Ιωαννίνων (EL)
University of Ioannina (EN)

Materials Science & Engineering C-Biomimetic and Supramolecular Systems (EN)

English

2008

<Go to ISI>://000258076100046

Elsevier (EN)



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