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Open AccessArticle

The Influence of the Parameters of a Gold Nanoparticle Deposition Method on Titanium Dioxide Nanotubes, Their Electrochemical Response, and Protein Adsorption

1
Department of Biomedical Engineering, Faculty of Mechanical Engineering, University of Zielona Gora, Prof. Z. Szafrana 4, 54-516 Zielona Gora, Poland
2
Nalecz Institute of Biocybernetics and Biomedical Engineering, Polish Academy of Sciences, Ks. Trojdena 4, 02-109 Warszawa, Poland
*
Author to whom correspondence should be addressed.
Biosensors 2019, 9(4), 138; https://doi.org/10.3390/bios9040138
Received: 19 September 2019 / Revised: 6 November 2019 / Accepted: 11 November 2019 / Published: 20 November 2019
(This article belongs to the Special Issue Nanoparticle-Based Biosensors for Food and Health Monitoring)
The goal of this research was to find the best conditions to prepare titanium dioxide nanotubes (TNTs) modified with gold nanoparticles (AuNPs). This paper, for the first time, reports on the influence of the parameters of cyclic voltammetry process (CV) -based AuNP deposition, i.e., the number of cycles and the concentration of gold salt solution, on corrosion resistance and the capacitance of TNTs. Another innovation was to fabricate AuNPs with well-formed spherical geometry and uniform distribution on TNTs. The AuNPs/TNTs were characterized using scanning electron microscopy, X-ray photoelectron spectroscopy, electrochemical impedance spectroscopy, and open-circuit potential measurement. From the obtained results, the correlation between the deposition process parameters, the AuNP diameters, and the electrical conductivity of the TNTs was found in a range from 14.3 ± 1.8 to 182.3 ± 51.7 nm. The size and amount of the AuNPs could be controlled by the number of deposition cycles and the concentration of the gold salt solution. The modification of TNTs using AuNPs facilitated electron transfer, increased the corrosion resistance, and caused better adsorption properties for bovine serum albumin. View Full-Text
Keywords: titanium dioxide nanotubes; gold nanoparticles; deposition process; cyclic voltammetry; electrochemical characteristics; protein adsorption titanium dioxide nanotubes; gold nanoparticles; deposition process; cyclic voltammetry; electrochemical characteristics; protein adsorption
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MDPI and ACS Style

Paradowska, E.; Arkusz, K.; Pijanowska, D.G. The Influence of the Parameters of a Gold Nanoparticle Deposition Method on Titanium Dioxide Nanotubes, Their Electrochemical Response, and Protein Adsorption. Biosensors 2019, 9, 138.

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