Biosensors - download pdf or read online

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The possibility to combine both properties, such as the higher surface area and electrocatalytic effect exhibited from ZnO, with the surface adhesive properties of chitosan can be used to manipulate and control the analytic signal in the presence of a specific substrate. The marked electrocatalytic activity toward urea permits effective low-potential amperometric biosensing. , 2009). , (2007) 38 Biosensors have developed nickel nanoelectrode to determined the urease by electrochemical and votammetry methods.

The developed biosensor displayed good performance for the detection of H2O2 and NaNO2 with a wide linear range of 1–410 and 10–2700 μM, respectively. , (2008) prepared complex film containing of hemoglobin, nano ZnO, chitosan and nano Au to immobilized onto glassy carbon electrode for H2O2 sensing. 7x 10-8 mol L-1) of the fabricated bioelectrode. To fabricate a highly reproducible sensitive and selective biosensor based on direct electron transfer from enzymes to the electrode surface. Recently, research activities have been directed toward combining the advantageous feature of sol-gel derived nanostructured TiO2 34 Biosensors film and the glassy carbon electrode fabrication.

2006). The good sensitivity and long-term stability of the biosensor was measured indicating that the direct immobilization of heme proteins on Fe3O4 matrix is a promising substrate for hydrogen peroxide sensing. These films were constructed on several conductive bases (glassy carbon electrode, ITO glass, and Al foil) by first electrodeposition of chitosan/Fe3O4 thin films and then a layer-by-layer assembly using phytic acid and chitosan/Fe3O4. , (2005) fabricated a H2O2 biosensor based on Prussian blue modified magnetic nanoparticles.

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