Platinum nanoparticle decoration of carbon materials with applications in non-enzymatic glucose sensing
| Autor: | Denise A. Egan, Dhanraj Rathod, Calum Dickinson, Eithne Dempsey |
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| Rok vydání: | 2010 |
| Předmět: |
Thermogravimetric analysis
Materials science biology Inorganic chemistry Metals and Alloys chemistry.chemical_element Carbon nanotube Condensed Matter Physics Platinum nanoparticles Surfaces Coatings and Films Electronic Optical and Magnetic Materials law.invention chemistry.chemical_compound chemistry law Materials Chemistry biology.protein Glucose oxidase Electrical and Electronic Engineering Cyclic voltammetry Hybrid material Instrumentation Ethylene glycol Carbon Nuclear chemistry |
| Zdroj: | Sensors and Actuators B: Chemical. 143:547-554 |
| ISSN: | 0925-4005 |
| Popis: | Nanocomposites of ethylene glycol protected platinum nanoparticles were prepared in the presence of activated carbon (AC), multi-walled carbon nanotubes (MWNTs) and carbon nanofibres (CNFs) at 20% (w/w) Pt loading and their potential in non-enzymatic glucose sensing evaluated. Physical and electrochemical characterization of these hybrid materials was enabled using transmission electron microscopy (TEM), X-ray diffraction (XRD), thermogravimetric analysis (TGA) and cyclic voltammetry. The average platinum nanoparticle diameters, as determined from TEM and XRD measurements, were 2 ± 1 to 3 ± 1 nm. The electrochemically active surface area of the platinum nanoparticles were found to be 91, 78 and 128 m2 g−1 for Pt-C, Pt-MWCNT and Pt-CNF respectively, as determined by the hydrogen adsorption/desorption phenomenon, using cyclic voltammetry in H2SO4. The nanomaterials were applied to the direct non-enzymatic quantization of glucose over its physiological range in the absence of the enzyme glucose oxidase. Hydrodynamic amperometric at Eapp = 0.55 V vs. Ag/AgCl in phosphate buffer (pH 7.4) was employed and the materials responded linearly to glucose (at pH 7.4, 298 K) over the range 2–20 mM (R2 = 0.99) with sensitivity 1.07, 1.10 and 0.52 μA mM−1 cm−2 for Pt-C, Pt-MWCNT and Pt-CNF respectively. |
| Databáze: | OpenAIRE |
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