Long-term stability of antibacterial TiN-Ag coatings deposited by combining cathodic arc evaporation and magnetron sputtering

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216224%3A14310%2F25%3A00142588" target="_blank" >RIV/00216224:14310/25:00142588 - isvavai.cz</a>

Výsledek na webu

<a href="https://www.sciencedirect.com/science/article/pii/S2468023025020826" target="_blank" >https://www.sciencedirect.com/science/article/pii/S2468023025020826</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.surfin.2025.107830" target="_blank" >10.1016/j.surfin.2025.107830</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Long-term stability of antibacterial TiN-Ag coatings deposited by combining cathodic arc evaporation and magnetron sputtering

Popis výsledku v původním jazyce

Silver-containing titanium nitride coatings (TiN-Ag) are deposited in industrial conditions by combining cathodic arc evaporation of a titanium target and magnetron sputtering of a silver target in a reactive argon-nitrogen atmosphere. They are deposited on steel substrates with the prospect of producing innovative antibacterial surfaces for everyday objects that are frequently exposed to human hand contact. Two different silver concentrations are studied to assess their impact on the antibacterial efficacy and mechanical properties of the coating. The obtained coatings are made of a mixture of two crystalline phases, TiN and Ag, that are in the same cubic system. Metallic silver in the coating provides an efficient antibacterial effect against two bacterial strains, Staphylococcus aureus ATCC 6538P and Escherichia coli ATCC 8739. The antibacterial effect against E. coli ATCC 8739 is higher because the cell wall of S. aureus ATCC 6538P is thicker, making it more difficult to degrade and penetrate for silver ions. The long-term stability of the TiN-Ag coatings is evaluated by two different approaches. The first one uses specific equipment that simulates repetitive finger touches, and the second one consists in the attachment of coated steel samples to door handles for a two-month experiment in real-life conditions.

Název v anglickém jazyce

Long-term stability of antibacterial TiN-Ag coatings deposited by combining cathodic arc evaporation and magnetron sputtering

Popis výsledku anglicky

Silver-containing titanium nitride coatings (TiN-Ag) are deposited in industrial conditions by combining cathodic arc evaporation of a titanium target and magnetron sputtering of a silver target in a reactive argon-nitrogen atmosphere. They are deposited on steel substrates with the prospect of producing innovative antibacterial surfaces for everyday objects that are frequently exposed to human hand contact. Two different silver concentrations are studied to assess their impact on the antibacterial efficacy and mechanical properties of the coating. The obtained coatings are made of a mixture of two crystalline phases, TiN and Ag, that are in the same cubic system. Metallic silver in the coating provides an efficient antibacterial effect against two bacterial strains, Staphylococcus aureus ATCC 6538P and Escherichia coli ATCC 8739. The antibacterial effect against E. coli ATCC 8739 is higher because the cell wall of S. aureus ATCC 6538P is thicker, making it more difficult to degrade and penetrate for silver ions. The long-term stability of the TiN-Ag coatings is evaluated by two different approaches. The first one uses specific equipment that simulates repetitive finger touches, and the second one consists in the attachment of coated steel samples to door handles for a two-month experiment in real-life conditions.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10305 - Fluids and plasma physics (including surface physics)

Projekt

<a href="/cs/project/LM2023039" target="_blank" >LM2023039: Centrum výzkumu a vývoje plazmatu a nanotechnologických povrchových úprav</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2025

Kód důvěrnosti údajů

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

Název periodika

Surfaces and Interfaces

ISSN

2468-0230

e-ISSN

—

Svazek periodika

75

Číslo periodika v rámci svazku

October

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

9

Strana od-do

107830

Kód UT WoS článku

001598711900005

EID výsledku v databázi Scopus

2-s2.0-105019771779