Highly Sensitive Electrodic Materials Based on Pt Nanoflowers Grown on Pt Nanospheres for Biosensor Development

In this work we describe the realization of monometallic nanostructures by two simple electrodeposition steps. The surface of the modified electrode was characterized by scanning electron microscopy that confirms a homogeneous deposition of Pt nanospheres decorated with Pt nanoflowers. The so obtained nanostructured sensor exhibited good amperometric response towards hydrogen peroxide sensing at +0.30 V vs Ag|AgCl|Cl-. Therefore, it is especially useful toward glucose detection with reduced interferences. Glucose oxidase was immobilized onto the nanostructured surface by cross-linking with glutaraldehyde and the biosensor was characterized by chronoamperometric method in phosphate buffer. The biosensor showed a sensitivity of 29 ± 2 μA/(mM cm<sup>2</sup>). Measurements in cell media reveal that the Pt-Pt hybrid nanostructures are promising for real-time glucose monitoring in real biosample.

Published in:
Proceedings of the 15th International IEEE Conference on Nanotechnology (NANO 2015)
Presented at:
15th International IEEE Conference on Nanotechnology (NANO 2015), Rome, Italy, July 27-30, 2015

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 Record created 2015-09-08, last modified 2020-07-29

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