Abstract
Surfaces in a hygiene critical environment can become potential reservoirs for transmission of pathogenic infections. Engineering surfaces with the tunable anti-biofouling and antibacterial properties could reduce infections particularly in hospitals and public transport hubs. In the present work, a facile two-step process has been deployed to fabricate a superhydrophobic and antibacterial aluminum surface by chemical etching, followed by passivation with low surface energy octyltriethoxysilane (OTES) molecules. The wettability and antibacterial properties of the OTES passivated aluminum was monotonically tuned by adding quaternary ammonium (QUATs) molecules. An anti-biofouling property of 99.9% against Staphylococcus aureus, 99% against Pseudomonas aeruginosa and 99% against E. coli bacteria, was achieved.
Highlights
Antibacterial coatings for biomedical implant devices and high touch surface applications have gained much attention in recent times due to their ability to reduce the prevalence of nosocomial infections [1,2]
Antibacterial coatings may prevent biofilm formation, medical impact device failure and post-operative bacterial infections, and reduce microbial bioburden in hygiene critical environment [2]
Coatings 2020, 10, x FOR PEER REVIEW. While those at 2955, 2920 and 2853 cm−1 can be assigned to asymmetric CH3 groups; and symmetric the asymmetrical stretching vibration of vibration of the Si−O−Si located in theAgain, 1060–1100 cm−1 bands
Summary
Antibacterial coatings for biomedical implant devices (such as catheters, artificial hip and knee joints, etc.) and high touch surface applications have gained much attention in recent times due to their ability to reduce the prevalence of nosocomial infections [1,2]. Antibacterial coatings may prevent biofilm formation, medical impact device failure and post-operative bacterial infections, and reduce microbial bioburden in hygiene critical environment [2]. Surfaces act as hot-spots for transmission of pathogenic infections [2]. To this end, engineering surfaces with antibacterial property has been acknowledged as an important strategy for reducing microbial bioburden and the prevalence of infections [3]. Among surfaces with antibacterial properties, anti-biofouling and superhydrophobic surfaces seem desirable as they have the ability to inhibit bacterial attachment on surfaces
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