February 23, 2023 - Both ampicillin and gentamicin inhibit MRSA biofilm with higher concentrations of 200 μg/mL and 250 μg/mL in comparison to HRG, and concentration inverted microscopic results are included in Figure 9. Graphene and materials made from it (GMs) showed a variety of antibacterial activities against viruses, fungi, and bacteria (Alangari et al., 2022). The primary source of these effects is thought to be the direct physicochemical contact between GMs and bacteria, resulting in the fatal destruction of biological components, primarily proteins, lipids, and nucleic acids (Mohammed et al., 2020).

February 28, 2021 - Here and according to the obtained data, we suggest that the biofilm responses were mainly associated to indirect effects initiated by the overproduction of EPS by the diatom. This potentially increased the amount of carbon available for bacterial metabolism and further benefit to the diatom. However, the oxidized form of graphene was shown to strongly impact bacterial biomass.

A significant increase in the enzymatic (SOD and GSTs activity) and low molecular weight (lipids and carotenoids) antioxidant response was observed, that efficiently reduced oxidative stress effects, reducing the level of peroxidation, and preserving membrane integrity. Being complex entities, biofilms are more similar to environmental communities and may provide more accurate information to evaluate the impact of GO in aquatic systems. Keywords: graphene oxide, freshwater biofilms, shading, photosynthetic pigments, oxidative damage, antioxidant activity

Graphene oxide (GO) has been reported to possess antibacterial activity; therefore, its accumulation in the environment could affect microbial communities such as biofilms. The susceptibility of biofilms to antimicrobials is known to depend ...

April 30, 2025 - Graphene is widely explored as a non-invasive coating to prevent corrosion by microbial biofilms, yet its vulnerability to quorum sensing (QS)-regulated colonization remains unclear.

The graphene surface provides an effective barrier thereby preventing physical contact between the bacteria and underlying substrate to substantially suppress interaction, which is an essential requirement for the establishment of the biofilm.

According to recent studies, graphene promotes the formation of biofilms and bacterial growth [13,14,15]. Graphene is a promising candidate for biological, antifouling, and anticorrosion applications despite the lack of substantial research in these areas. A small number of papers have reported ...

May 8, 2023 - Fallatah H, Elhaneid M, Ali-Boucetta H et al (2019) Antibacterial effect of graphene oxide (GO) nano-particles against Pseudomonas putida biofilm of variable age. Environ Sci Pollut Res 26:25057–25070.

January 18, 2023 - Biofilm architecture analysis indicated that mature biofilms developed on the graphene-based surface had fewer empty spaces (34% reduction) and reduced biovolume (25% reduction) compared to PDMS.

Both ampicillin and gentamicin inhibit MRSA biofilm with higher concentrations of 200 μg/mL and 250 μg/mL in comparison to HRG, and concentration inverted microscopic results are included in Figure 9. Graphene and materials made from it (GMs) showed a variety of antibacterial activities against viruses, fungi, and bacteria (Alangari et al., 2022). The primary source of these effects is thought to be the direct physicochemical contact between GMs and bacteria, resulting in the fatal destruction of biological components, primarily proteins, lipids, and nucleic acids (Mohammed et al., 2020).

January 18, 2023 - For the last four incubation weeks, ... results indicate that the graphene-based polymeric coating showed significant antibacterial and antibiofilm performance....

On the one hand, multiple reports describe GMs promoting bacterial growth and biofilm formation (ElMekawy et al., 2017; Ruiz et al., 2011; Hegab et al., 2016). In these studies, pristine graphene (Gr), graphene oxide (GO), and reduced graphene oxide (rGO) are put forward as high-performance materials for diverse applications where bacterial metabolism must be stimulated such as power generation by microbial fuel cells (MFCs) or the acceleration of methane production by anaerobic digestion (Cotts et al., 2020; Tian et al., 2017).

TiGD presented high quality and coverage and decreased biofilm formation for all species. The increased hydrophobicity of graphene films was correlated with the decreased biofilm formation for various species.

January 14, 2023 - Here the study demonstrated graphene oxide antimicrobial efficacy against biofilm and intracellular S. aureus isolated from subclinical cases mastitis cases in Malaysia. GO was effective against the extracellular, intracellular, and biofilms forms of S. aureus. The intracellular antimicrobial activities appeared to be dependent on the actin polymerization of the membrane cell that controls the macropinocytosis uptake pathway of the cells.

The graphene oxide nanowalls were obtained by electrophoretic deposition of Mg2+-graphene oxide nanosheets synthesized by a chem. exfoliation method. On the basis of measuring the efflux of cytoplasmic materials of the bacteria, it was found that the cell membrane damage of the bacteria caused by direct contact of the bacteria with the extremely sharp edges of the nanowalls was the effective mechanism in the bacterial inactivation.

In this study, we evaluated the influences of graphene oxide (GO) on biofilm formation. Escherichia coli MG1655 and Bacillus subtilis 168 were used as models for Gram-negative and Gram-positive bacteria. The growth profiles and viability assays indicated that GO exhibited a high antibacterial activity, of which the negative effects on bacteria growth raised with the increasing GO concentration.

June 6, 2023 - A significant increase in the enzymatic (SOD and GSTs activity) and low molecular weight (lipids and carotenoids) antioxidant response was observed, that efficiently reduced oxidative stress effects, reducing the level of peroxidation, and preserving membrane integrity. Being complex entities, biofilms are more similar to environmental communities and may provide more accurate information to evaluate the impact of GO in aquatic systems. Keywords: antioxidant activity; freshwater biofilms; graphene oxide; oxidative damage; photosynthetic pigments; shading.

December 24, 2024 - Nanocomposites based on graphene ... biofilms, contributing to changes throughout the biofilm structure, causing a significant reduction in the thickness of the structure, and affecting cell distribution....

January 22, 2022 - Indeed, P. aeruginosa formed biofilms which had on average 74% more biovolume and were 47% thicker than staphylococcal biofilms. Looking at the surface effect, the PDMS surfaces showed the highest biofilm amount and thickness (shadow projection on the right of Figure 6a,c) when compared to the graphene-based surface (Figure 6b,d).

February 15, 2017 - GO significantly enhanced the cell growth, biofilm formation, and biofilm development even up to a concentration of 500mg/L. In contrast, rGO (≥50mg/L) strongly inhibited cell growth and biofilm formation.