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An innovative electrochemical approach for voltammetric determination of levodopa using gold nanoparticles doped on titanium dioxide nanotubes

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Abstract

Catalytic nanotubes made from titanium dioxide (TiO2-NTs) and covered with gold nanoparticles (Au-NPs) were prepared via galvanic deposition of the Au-NPs on the TiO2-NTs. The morphology and surface characteristics of the resulting electrodes were investigated using scanning electron microscopy and energy-dispersive X-ray spectroscopy. The results indicated that the Au-NPs were homogeneously deposited on the surface of TiO2-NTs which consist of individual tubes of about 40–80 nm in diameter. The AuNPs with a size of 80–100 nm are well-dispersed on the surface of the TiO2-NTs. The electro-catalytic activity of the electrodes towards the electro-oxidation of levodopa was studied by cyclic voltammetry, differential puls voltammetry. The results showed that the electrodes exhibit a considerably higher activity toward the oxidation of levodopa. The oxidation peak current linearly depends on the concentration of levodopa in the 10 to 70 μM concentration range. Levodopa was determined by the method in pharmaceutical preparations, and results were found to be satisfactory.

Comparison of cyclic voltammograms of Au‐TiO2‐NTs/Ti and a flat gold electrode for determination levodopa.

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Acknowledgements

The authors would like to acknowledge the financial support of Iranian Nanotechnology Society and the Office of Vice Chancellor in Charge of Research of University of Tabriz.

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Authors and Affiliations

  1. Tabriz Electrochemistry Research Laboratory, Department of Physical Chemistry, Chemistry Faculty, University of Tabriz, Tabriz, Zip code 0098-5166616471, Iran

    Mir Ghasem Hosseini, Masoud Faraji & Mohamad Mohsen Momeni

  2. Department of Chemistry, Peyam-Nour University (PNU), Marand, Zip Code 0098-5413889931, Iran

    Sohrab Ershad

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  1. Mir Ghasem Hosseini
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  2. Masoud Faraji
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  3. Mohamad Mohsen Momeni
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  4. Sohrab Ershad
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Correspondence to Mir Ghasem Hosseini.

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Hosseini, M.G., Faraji, M., Momeni, M.M. et al. An innovative electrochemical approach for voltammetric determination of levodopa using gold nanoparticles doped on titanium dioxide nanotubes. Microchim Acta 172, 103–108 (2011). https://doi.org/10.1007/s00604-010-0471-5

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  • DOI: https://doi.org/10.1007/s00604-010-0471-5

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