Optimizing the antimicrobial performance of metallic glass composites through surface texturing

Villapún, Victor M.; Qu, Bokun; Lund, Peter A.; Wei, Wen-Hou; Dover, Lynn G.; Thompson, Jonathan R.; Adesina, Janet O.; Hoerdemann, C.; Cox, Sophie C.; González, S.

doi:10.1016/j.mtcomm.2020.101074

Cited by 5 publications

(4 citation statements)

References 47 publications

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“…Nevertheless, apart from thermal oxidation, there are also other feasible approaches to introduce oxide that might be adapted accordingly, e.g. anodic oxidation [43] or laser surface treatment [32,44,45].…”

Section: Discussion On This Promising Strategy and Practical Insightsmentioning

confidence: 99%

Tailor the antibacterial efficiency of copper alloys by oxidation: when to and when not to

et al. 2022

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Copper and its relevant species, such as oxides and many alloys, have been recognised as potential antibacterial surfaces. Despite the relatively low antibacterial efficacy of cuprous oxide (Cu2O) compared to pure copper, it is still worth consideration in some scenarios. Taking copper-nickel co-sputtered thin films with two copper contents (55 and 92 at.%) as examples, this work investigated the potential of oxidation in altering the antibacterial behaviour of copper alloy surfaces. By heat treatment at 200–250 °C for 20–24 h, a layer mainly composed of Cu2O was successfully fabricated on the top of the Cu-Ni alloys. Antibacterial efficiency against Escherichia coli in 1 h was obtained by the droplet method and further compared. The coupons with 92 at.% copper became less effective after oxidation: the reduction rate declines from 97.0 to 74.3%; whereas the coupons with 55 at.% copper showed a large increase after oxidation, rising from 15.0 to 66.8%. The experiments described herein reveal a promising concept of oxidation in enhancing the less effective copper alloy surfaces for antibacterial applications. Graphical abstract

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Section: Discussion On This Promising Strategy and Practical Insightsmentioning

confidence: 99%

Tailor the antibacterial efficiency of copper alloys by oxidation: when to and when not to

et al. 2022

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“…The studies previously described have been mostly focused on optimizing the chemical composition of materials to control their antimicrobial effectiveness. Nevertheless, other factors, including surface morphologies [186] and oxidation [187], crystalline phases content [188] are also at work. For instance, Villapún et al [187] demonstrated that the oxidation can increase the antimicrobial performance of the Cu-based BMGs, and the improvement can be explained by the fact that interphase boundaries could constitute the easy diffusion paths for Cu ions release, while the needle-shape structure of oxides could trigger mechanosensitive channels to promote the migration of copper ions into the cell.…”

Section: Copper Based Mgs For Antibacterial Surfacesmentioning

confidence: 99%

Recent development of chemically complex metallic glasses: from accelerated compositional design, additive manufacturing to novel applications

et al. 2022

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Metallic glasses or amorphous alloys are an important engineering material that has a history of research of about 80-90 years. While different fast cooling methods were developed for multi-component metallic glasses between 1960s and 1980s, 1990s witnessed a surge of research interest in the development of bulk metallic glasses. Since then, one central theme of research in the metallic-glass community has been compositional design that aims to search for metallic glasses with a better glass forming ability, a larger size and/or more interesting properties, which can hence meet the demands from more important applications. In this review article, we focus on the recent development of chemically complex metallic glasses, such as high entropy metallic glasses, with new tools that were not available or mature yet until recently, such as the state-of-the-art additive manufacturing technologies, high throughput materials design techniques and the methods for big data analyses (e.g. machine learning and artificial intelligence). We also discuss the recent use of metallic glasses in a variety of novel and important applications, from personal healthcare, electric energy transfer to nuclear energy that plays a pivotal role in the battle against global warming.

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“…The current research on metallic implants is pointing out the possibility of fine tuning the topology and chemistry of biomaterials with natural antimicrobial properties to increase effectiveness. 118,119 Thus, surface alteration of inert and antibacterial surfaces is becoming more prominent in the biomaterial community.…”

Section: Surface Modificationsmentioning

confidence: 99%

A call for action to the biomaterial community to tackle antimicrobial resistance

et al. 2020

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Optimizing the antimicrobial performance of metallic glass composites through surface texturing

Abstract: Sergio (2020) Optimizing the antimicrobial performance of metallic glass composites through surface texturing. Materials Today Communications, 23. p. 101074.

Cited by 5 publications

References 47 publications

Tailor the antibacterial efficiency of copper alloys by oxidation: when to and when not to

Tailor the antibacterial efficiency of copper alloys by oxidation: when to and when not to

Recent development of chemically complex metallic glasses: from accelerated compositional design, additive manufacturing to novel applications

A call for action to the biomaterial community to tackle antimicrobial resistance

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