Electrochemical and bio-sensing platform based on a novel 3D Cu nano-flowers/layered MoS2 composite
| Autor: | Yongnian Ni, Xiaoyun Lin, Serge Kokot |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Materials science
Scanning electron microscope Biomedical Engineering Biophysics Analytical chemistry 02 engineering and technology General Medicine 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Amperometry 0104 chemical sciences Dielectric spectroscopy chemistry.chemical_compound chemistry Transmission electron microscopy Electrode Electrochemistry Cyclic voltammetry 0210 nano-technology Molybdenum disulfide Biosensor Biotechnology |
| Zdroj: | Biosensors and Bioelectronics. 79:685-692 |
| ISSN: | 0956-5663 |
| DOI: | 10.1016/j.bios.2015.12.072 |
| Popis: | A novel 3D nano-flower-like Cu/multi-layer molybdenum disulfide composite (CuNFs/MoS2) modified glassy carbon electrode (GCE) has been successfully constructed. It was a highly sensitive and selective non-enzymatic hydrogen peroxide (H2O2) and glucose biosensor. The morphology of the obtained CuNFs-MoS2 nano-particles was investigated with the use of a scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD) and energy dispersive X-ray spectroscopy (EDS). The physicochemical properties of the modified electrode were characterized at each of the construction stages with the use of an electrochemical impedance spectroscopy (EIS) and cyclic voltammetry (CV) techniques. The new sensor combined the advantages of MoS2 and CuNFs, and exhibited high electro-catalytic activity toward H2O2 and glucose. Quantitative analysis of H2O2 and glucose was carried out with the use of the amperometric i-t method. Linear ranges were obtained between 0.04-1.88 μM and 1.88-35.6 μM for H2O2 and 1-20 μM and 20-70 μM for glucose, and their corresponding limits of detection (LOD) were 0.021 μM and 0.32 μM. This novel sensor was successfully applied for the quantitative analysis of H2O2 in tap water and glucose in human serum samples. |
| Databáze: | OpenAIRE |
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