Graphene family nanomaterials (GFNs)—promising materials for antimicrobial coating and film: A review

Han, Wei; Wu, Zhenzhen; Li, Yao; Wang, Yingying

doi:10.1016/j.cej.2018.10.106

Cited by 134 publications

(82 citation statements)

References 183 publications

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“…The mechanisms of action have been thoroughly explored, with recently published reviews covering the most important conclusions so far. As suspensions, GBM act either through wrapping, isolating bacteria from the environment, or through insertion or nano knife, physically piercing the membrane, although oxidative stress can also be stimulated [31,42]. As surfaces, they act after direct contact with bacteria, with predominant mechanisms depending on the exposure of either basal planes or sharp edges: electron transference and oxidative stress induction occur mostly when only basal planes are exposed, while besides these, physical damage of the membrane (due to insertion or protein-protein destabilization) can also occur when both structures contact bacteria [40,43,44].…”

Section: Introductionmentioning

confidence: 99%

Exposure of Smaller and Oxidized Graphene on Polyurethane Surface Improves its Antimicrobial Performance

et al. 2020

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Catheter-related infections are a common worldwide health problem, highlighting the need for antimicrobial catheters. Here, antibacterial potential of graphene nanoplatelets (GNP) incorporated in the commonly used polymer for catheter manufacture—polyurethane (PU)—is investigated. Two strategies are explored: melt-blending, producing a composite, and dip coating, where a composite layer is deposited on top of PU. GNP with different lateral sizes and oxidation degrees—GNP-M5, GNP-M15, GNP-M5ox, GNP-M15ox—are applied in both strategies, and the antimicrobial potential towards Staphylococcus epidermidis of GNP dispersions and GNP-containing PU evaluated. As dispersions, oxidized and smaller GNP powders (GNP-M5ox) inhibit 74% bacteria growth at 128 µg/mL. As surfaces, GNP exposure strongly impacts their antimicrobial profile: GNP absence at the surface of composites yields no significant effects on bacteria, while by varying GNP: PU ratio and GNP concentration, coatings enhance GNP exposure, depicting an antimicrobial profile. Oxidized GNP-containing coatings induce higher antibacterial effect than non-oxidized forms, particularly with smaller GNPox, where a homogeneous layer of fused platelets is formed on PU, leading to 70% reduction in bacterial adhesion and 70% bacterial death. This pioneering work unravels how to turn a polymer clinically used to produce catheters into an antimicrobial surface, crucial to reducing risk of infection associated with catheterization.

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Section: Introductionmentioning

confidence: 99%

Exposure of Smaller and Oxidized Graphene on Polyurethane Surface Improves its Antimicrobial Performance

et al. 2020

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“…21 Therefore, it seems possible that these results are due to the Fe 3 O 4 molecules of rGO/Fe 3 O 4 that could act as a source of Fe + ion and also cover the sharp edges and reactive functional group of rGO preventing its adverse effects on cell growth that suggested as an antifungal mechanism of GBNs in literature. 68 Moreover, the results showed that GA production was improved under the elicitation of rGO/Fe 3 O 4 , and G. lucidum produced significantly…”

Section: Effects Of Gbns On Fungal Growth and Gas Biosynthesismentioning

confidence: 96%

Effects of different graphene‐based nanomaterials as elicitors on growth and ganoderic acid production by Ganoderma lucidum

Rostami

Yazdian

Mirjani

et al. 2020

Biotechnology Progress

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Graphene-based nanomaterials (GBNs) have attracted considerable interest nowadays due to their wide range of applications. However, very little attention has been paid to the application of nanomaterials as potential elicitors for production of valuable metabolites. Herein, aiming to earn insight into effects of nanomaterials on secondary metabolite biosynthesis by medicinal fungi, we evaluated the influence of GBNs on growth and production of ganoderic acid (GA) by Ganoderma lucidum in submerged culture. Graphene oxide (GO), reduced graphene oxide (rGO), and rGO/Fe 3 O 4 nanocomposite were synthesized successfully and characterized by X-ray diffraction, Fourier transform infrared spectroscopy, and scanning electron microscopy analysis. The prepared nanomaterials were added to the culture of G. lucidum at final concentrations of 50, 100, and 150 mg/L on Day 5. The results showed that the elicitation of G. lucidum with GO and rGO decreased the cell dry weight and GA production slightly, especially in higher concentrations. However, rGO/Fe 3 O 4 nanocomposite not negatively affected cell growth and improved GA production. G. lucidum growth rate responded to elicitation experiments differently and depended on the type of nanomaterials and their concentrations, but almost all GBNs caused an increase in GA content (mg/100 mg dry weight). Also, field emission scanning electron microscopy morphological study showed that under elicitation, mycelia were more condensed and tightly stacked together. The findings from this study may suggest that GBNs in low concentrations could be applied as elicitors to secondary metabolites production from higher fungus, but further environmental, physiological, and biological studies required.

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“…In Figure 2b, the graphene nanosheet observed is approximately 14 nm and is much bigger than a bacteria cell (~ 1 μm), indicating that the mechanism of cell wrapping (discussed in Section 3.2) is able to contribute to the antibacterial activity when using MnFe2O4-G for antibacterial suspension tests. Also, large-size graphene nanosheets enhance the adhesion ability of bacteria, which means more chance to be in contact with and inactivate bacteria (Han et al, 2019). Additionally, the transparent nanosheets presented in Figure 2b indicate a fewlayer graphene.…”

Section: Nanocomposite Characterizationmentioning

confidence: 98%

Manganese ferrite graphene nanocomposite synthesis and the investigation of its antibacterial properties for water treatment purposes

Soletti¹,

Ferreira²,

Kassada³

et al. 2020

Rev. ambiente água

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The main objective of this study was to synthesize a nanocomposite using graphene and manganese ferrite nanoparticles (MnFe2O4-G) and to evaluate its antibacterial activity for water treatment purposes. Its morphological characteristics were evaluated by instrumental techniques, such as scanning electron microscopy and transmission electron microscopy. The characterization results indicated that the nanocomposite presented nanoparticles of approximately 25 nm well dispersed in transparent and large (14 μm) graphene nanosheets. The antibacterial activity was evaluated in a batch experiment using a concentration of 40 μg mL-1 of nanocomposite (MnFe2O4-G, bare MnFe2O4 nanoparticles or graphene oxide), 1x105 CFU mL-1 of Escherichia coli, and 8 h of contact time at room temperature. The highest antibacterial capacity was observed for the hybrid nanocomposite (91.91%), due to the synergic effect of graphene and MnFe2O4 nanoparticles. Various mechanisms were proposed to explain the effective antibacterial activity of MnFe2O4-G, such as wrapping, oxidative stress, sharp-edge cutting effect, among others. The results showed that MnFe2O4-G is a potential alternative in water treatment processes as an antibacterial agent.

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Graphene family nanomaterials (GFNs)—promising materials for antimicrobial coating and film: A review

Cited by 134 publications

References 183 publications

Exposure of Smaller and Oxidized Graphene on Polyurethane Surface Improves its Antimicrobial Performance

Exposure of Smaller and Oxidized Graphene on Polyurethane Surface Improves its Antimicrobial Performance

Effects of different graphene‐based nanomaterials as elicitors on growth and ganoderic acid production by Ganoderma lucidum

Manganese ferrite graphene nanocomposite synthesis and the investigation of its antibacterial properties for water treatment purposes

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