Electrochemical behaviour of the nanotubular TiAlV surface in the presence of bacteria

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22310%2F21%3A43923567" target="_blank" >RIV/60461373:22310/21:43923567 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Electrochemical behaviour of the nanotubular TiAlV surface in the presence of bacteria

Popis výsledku v původním jazyce

The nanotubular surface of Ti-6Al-4V alloy was prepared by anodic oxidation in fluorides containing electrolyte and covered by several bacteria strains: E. Coli, S. Aureus and P. Aeruginosa. The samplase with bacteria were cultivated in agar with nutrient and electrochemical impedance spectra, open circuit potential and polarisation resistance were measured throughout 48 hours exposure. The presence of bacteria was detected during up to 24 hours. The open circuit potential decreases reflecting the oxygen consumption by bacteria. The electrochemical impedance spectra showed several frequency windows, which reflects processes on the surface. The first one was at high frequencies and corresponds to the fast reactions such as nitrate metabolism and also reflecting surface coverage by bacteria. The slow reactions were detected at middle-low frequencies. One of the possible reaction candidates is iron ions oxidation/reduction. The impedance spectroscopy showed increasing sensitivity to used bacteria strain E. Coli, P. Aeruginosa and S. Aureus, respectively. The results indicate that nanostructured Ti-6-Al-4V surface should be a possible candidate for bacteria detection sensors.

Název v anglickém jazyce

Electrochemical behaviour of the nanotubular TiAlV surface in the presence of bacteria

Popis výsledku anglicky

The nanotubular surface of Ti-6Al-4V alloy was prepared by anodic oxidation in fluorides containing electrolyte and covered by several bacteria strains: E. Coli, S. Aureus and P. Aeruginosa. The samplase with bacteria were cultivated in agar with nutrient and electrochemical impedance spectra, open circuit potential and polarisation resistance were measured throughout 48 hours exposure. The presence of bacteria was detected during up to 24 hours. The open circuit potential decreases reflecting the oxygen consumption by bacteria. The electrochemical impedance spectra showed several frequency windows, which reflects processes on the surface. The first one was at high frequencies and corresponds to the fast reactions such as nitrate metabolism and also reflecting surface coverage by bacteria. The slow reactions were detected at middle-low frequencies. One of the possible reaction candidates is iron ions oxidation/reduction. The impedance spectroscopy showed increasing sensitivity to used bacteria strain E. Coli, P. Aeruginosa and S. Aureus, respectively. The results indicate that nanostructured Ti-6-Al-4V surface should be a possible candidate for bacteria detection sensors.

Druh

O - Ostatní výsledky

CEP obor

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OECD FORD obor

20501 - Materials engineering

Projekt

<a href="/cs/project/NU20-06-00424" target="_blank" >NU20-06-00424: Implantabilní senzory pro včasnou detekci zánětu a bakteriální kolonizace</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2021

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů