Regensburg 2016 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 69: Nanostructures at Surfaces: Dots, Particles, Clusters
O 69.5: Poster
Mittwoch, 9. März 2016, 18:15–20:30, Poster A
Electrodeposition of nickel oxide nanoparticles on micron-sized CVD grown graphene for non-enzymatic glucose sensors with enhanced sensitivity — •Masoumeh Sisakhti1, Eva-Maria Kirchner2, Thomas Hirsch2, and Christoph Strunk1 — 1Institut für Experimentelle und Angewandte Physik,Universität Regensburg — 2Institut für Analytische Chemie, Chemo- und Biosensorik,Universität Regensburg
We report an optimized electrochemical approach for the non-enzymatic detection of glucose, based on CVD graphene (100×200 µ m2 in size), decorated with electrodeposited nickel oxide nanoparticles.
The electrochemical growth of the nanoparticles on the carbon nanomaterial was studied and optimized in detail to provide a composite material with large surface area consisting of homogeneous particle size distribution and small particle diameter ranging from 80 to 250 nm.
We studied the electrocatalytic properties of the devices by cyclic voltammetry (CV) and amperometry. Our results demonstrate that the amperometric sensors present electrocatalytic parameters such as a low detection limit of 25 µM and wide linear response range of 25µ M to 6.4 mM, indicating that the device operates well in the desired concentration range.
The sensitivity of the micro-sized non-enzymatic amperometric sensor is sufficient for the production of highly integrated sensor arrays for drug screening in small volumes of body fluids.