Structural, electronic structure and antibacterial properties of graphene-oxide nano-sheets

Sharma, Aditya; Varshney, Mayora; Nanda, Sitansu Sekhar; Shin, Hyun Joon; Kim, Namdong; Yi, Dong Kee; Chae, Keun Hwa; Won, Sung Ok

doi:10.1016/j.cplett.2018.03.010

Cited by 40 publications

(24 citation statements)

References 35 publications

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“…The company, known as "G6 Materials", is working on the development of an air filtration system using graphene, which can be used in offices and warehouses to destroy viruses [6]. Another technology using self-sterilizable laserinduced graphene (LIG) has been developed for water filters that eliminate viruses and bacteria in the water, and the same can be used in masks and heating or air conditioning systems to filter the air to reduce the risk of COVID-19 [7].…”

Section: Resultsmentioning

confidence: 99%

“…In addition, traces of ROS disrupt the ability of bacterial cells to maintain their normal physiologically regulated redox function, thereby destroying the integrity of the bacterial cell membrane. Disruption of the bacterial cell membrane through chemical oxidation leads to cell cleavage and the formation of ROS traces, which ultimately cause cell death [7].…”

Section: Resultsmentioning

confidence: 99%

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The Use of Innovative Materials in the Organization of Clinical Treatment in Dentistry

Aliev

Nersisyan

Denisova

et al. 2021

JPRI

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The article examines the features of the use of innovative materials in the organization of clinical treatment in dentistry. In modern conditions, solving the problem of patient safety is one of the main conditions for the functioning of medicine in general and dentistry in particular. For this reason, the search for innovations in the field of antimicrobial protection and, together with it, the functionality of various materials is one of the main tasks of researchers in the field of dentistry. Nanomaterials, which are made on the basis of graphene, are able to demonstrate excellent antimicrobial properties. These materials have the ability to disrupt the integrity of the bacterial cell membrane and produce reactive oxygen species (ROS). These materials are widely used in the manufacture of dentures, they are incorporated in the composition of composite resins and luting cements in the organization of restorative treatment, are used for the manufacture of adhesive materials. Many experts recognize that these materials are the future of dental practice, since they have the ability to provide a high level of functionality and safety.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

The Use of Innovative Materials in the Organization of Clinical Treatment in Dentistry

Aliev

Nersisyan

Denisova

et al. 2021

JPRI

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“…The first region arises from the O 1s core level excitation to unoccupied π * molecular orbitals. The second region, between 535 and 550 eV, originates from the σ * transition of O-H, C-O and C = O functional groups [27]. Another prominent absorption occurs on the lower energy side of σ * absorption at 535 eV.…”

Section: Spectromicrographs Of Pristine Cells and Cells Biosorbed At Various Concentrations Ofmentioning

confidence: 96%

Analysis of Cr(VI) Bioremediation by Citrobacter freundii Using Synchrotron Soft X-ray Scanning Transmission X-ray Microscopy

Anil

Swaraj

Subramanian

et al. 2021

QuBS

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Scanning transmission X-ray microscopy (STXM) was utilized for analysing the bioremediation of Cr(VI) by Citrobacter freundii, a species of gram-negative bacteria. The biosorption and bioreduction processes were analysed by the chemical mapping of cells biosorbed at different concentrations of Cr(VI). STXM spectromicroscopy images were recorded at O K-edge and Cr L-edge. A thorough analysis of the X-ray absorption features corresponding to different oxidation states of Cr in the biosorbed cell indicated the coexistence of Cr(III) and Cr(VI) at higher concentrations. This signifies the presence of partially reduced Cr(VI) in addition to biosorbed Cr(VI). In addition, the Cr(III) signal is intense compared with Cr(VI) at different regions of the cell indicating excess of reduced Cr. Speciation of adsorbed Cr was analysed for the spectral features of biosorbed cell and comparison with Cr standards. Analysis of absorption onset, L3/L2 ratio and absorption fine structure concludes that adsorbed Cr is predominantly present as Cr(III) hydroxide or oxyhydroxide. The evolution of absorption features in the duration of biosorption process was also studied. These time lapse studies depict the gradual decrement in Cr(VI) signal as biosorption proceeds. A strong evidence of interaction of Cr with the cell material was also observed. The obtained results provide insights into the biosorption process and chemical speciation of Cr on the cells.

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“…Owing to nano-sizes, it may interfere with several chemical processes taking place in cells. Such interactions may cause oxidative stress leading to bacterial cell death [19][20][21][22].…”

Section: Introductionmentioning

confidence: 99%

Study of photocatalytic and antibacterial activities of graphene oxide nanosheets

Singh

Bajaj

Bhardwaj

et al. 2018

Adv Compos Hybrid Mater

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Graphene oxide (GO) is a biocompatible material that is easily dispersible in water making its mixing easy with ceramic or polymer matrixes while trying to enhance their properties. In the present study, the photocatalytic and antibacterial activities of GO have been studied. GO has been synthesized by modified Hummer's method. The synthesized material has been characterized using X-ray diffraction, Raman spectroscopy, high-resolution transmission electron microscopy (HR-TEM), Fourier transform infrared spectroscopy (FT-IR) and UV-visible spectroscopy. HR-TEM confirmed the formation of GO nanosheets. It has been observed that GO nanosheets with excellent morphology exhibit efficient photocatalytic activity towards Congo red (CR) dye. Using advanced oxidation process, toxic organic dye CR is oxidized through reaction with reactive oxidative species generated by GO photocatalyst under UV-light irradiation. The study reflects new possibilities of GO for degradation of toxic organic pollutants. The effect of GO dose has also been studied and the reaction has been evaluated to be first order. Antibacterial activity of GO has been evaluated via well diffusion assay by growing Escherichia coli and Bacillus on LB agar plates.

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Structural, electronic structure and antibacterial properties of graphene-oxide nano-sheets

Cited by 40 publications

References 35 publications

The Use of Innovative Materials in the Organization of Clinical Treatment in Dentistry

The Use of Innovative Materials in the Organization of Clinical Treatment in Dentistry

Analysis of Cr(VI) Bioremediation by Citrobacter freundii Using Synchrotron Soft X-ray Scanning Transmission X-ray Microscopy

Study of photocatalytic and antibacterial activities of graphene oxide nanosheets

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