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69 results for “graphene oxide”
Dataset of "Asparagine-Modified Magnetic Graphene Oxide: An Efficient and Green Nanocatalyst for Synthesis of 5-oxodihydropyrano[3,2-c]chromenes and dihydropyrano[2,3- c]pyrazole derivatives and the Density functional theory calculation".
<p>The primary focus of this study involved the fabrication of a novel nanocatalyst Fe3O4-supported asparagine functionalized graphene oxide (Fe3O4@GO-N-(Asparagine)). The catalyst was synthesized through a four-step procedure.</p>
The top performer: towards optimized parameters for Reduced graphene oxide uniformity by Spin coating
<p>This dataset contains the raw data used for the publication:</p> <p>-------------------------------------------------------------------------------------------------------------------------------------------------------<br> "The top performer: towards optimized parameters for Reduced graphene oxide uniformity by Spin coating"<br> by C. Reiner-Rozman, R. Hasler, J. Andersson, T. Rodrigues, A. Bozdogan and P. Aspermair<br> --------------------------------------------------------------------------------------------------------------------------------------------------------</p> <p><br> It consists of the SEM images (in .tif format) and the determined surface coverages (in .dat format) as well as the measured electrical data (in .dat format) of the prepared graphene field-effect transistor chips. Headers/information in the data files are in English. When using this data in any form please refer to the above-mentioned publication.</p> <p>The data is structured according to the figures of the paper. Each folder contains the data relevant to validate the results presented in the respective figure of the publication. The files are labeled according to the following description:</p> <p>"measurement-type"_"chip-number"_"GO-concentration"_"spin-coating speed"</p> <p>"measurement-type": SEM, IDVG, baseline<br> "chip-number": an increasing number of fabricated device (only used when needed)<br> "GO-concentration": 143/214/285 µg/mL of graphene oxide (GO) in solution<br> "spin-coating speed": in rpm</p>
The potential of graphene oxide surfaces to reduce biofilms formed by uropathogens
<p>Polydimethylsiloxane (PDMS), 5 wt.% GNP/PDMS (GNP/PDMS), 1 wt.% graphene oxide (GO)/PDMS (GO1/PDMS), 3 wt.% GO/PDMS (GO3/PDMS), 5 wt.% GO/PDMS (GO5/PDMS)) were analyzed regarding hydrophobicity and roughness. Staphylococcus aureus and Pseudomonas aeruginosa biofilms were developed on these different surfaces under static conditions for 24h at 37°C. The number of biofilm total and culturable cells was quantified by flow cytometry and plate counts, respectively, whereas the biofilm amount was determined by crystal violet staining. Moreover, the mechanisms of action of GO were characterized using the flow cytometer.</p>
Tensile Properties of Flax Fibre Bundles with Graphene Oxide Coating
<p>In the current datasheet, authors report the effect of graphene oxide treatment on tensile behaviour of single flax fibre bundles. As graphene oxide is hydrophilic with many hydroxyl functional groups, it is expected to bond with technical fibres and increase the stress transfer in a flax yarn.</p> <p> Graphene oxide (GO) aqueous dispersion with 1.2 wt % is prepared based on the modified Hummer’s method. GO is physically adsorbed on fibres by immersion of flax yarns into the aqueous dispersion for 24 hr. Fibres are dried at 80 C for 2 hr followed by 48 hr at 60 C. To differentiate between the effect of GO treatment and the potential loss in the tensile strength and tensile stiffness of fibres, authors report the data in 4 subclasses:</p> <ul> <li>As received flax yarns (dried at 60 C for 48 hr): labelled ‘as received’</li> <li>Kept in deionised water for 30 min: tagged ’30 min’</li> <li>Placed in deionised water for 24 hr: marked ’24 hr’</li> <li>Flax fibres immersed in 1.2 wt % GO aqueous dispersion for 24 hr: labelled ‘GO’</li> </ul> <p>Tensile test of single natural fibres is a challenging measurement. This is mainly due to the hierarchical and nonhomogenous structure of single fibres and difficulty in their extraction. The test methods are not standard, and the final data is very scattered. As an alternative method, we report the tensile properties of flax fibre bundles based on the impregnated fibre bundle test (IFBT) [1].</p> <p>Materials and brief description of the methodology can be found in the datasheet under ‘method’ tab. Flax fibre bundles were extracted from AmpliTex 5009 flax fabrics kindly provided by Bcomp. The matrix was Epikote 828 LVEL epoxy resin with Dytek DCH-99 hardener.</p> <p>Impregnated fibre bundle tests were performed with Instron 5567 and 30 kN loadcell, with 120 mm gauge length and 4% min <sup>-1</sup> strain rate. The strain was measured by a 50 mm clip-on extensometer. The abrasive paper was placed without glue in between the testing clamps and the samples. All samples were stored one week before test in a controlled environment of RH 50 % and 25 C.</p> <p>In the current datasheet, authors report the effect of graphene oxide treatment on tensile behaviour of single flax fibre bundles. As graphene oxide is hydrophilic with many hydroxyl functional groups, it is expected to bond with technical fibres and increase the stress transfer in a flax yarn.</p> <p> Graphene oxide (GO) aqueous dispersion with 1.2 wt % is prepared based on the modified Hummer’s method. GO is physically adsorbed on fibres by immersion of flax yarns into the aqueous dispersion for 24 hr. Fibres are dried at 80 C for 2 hr followed by 48 hr at 60 C. To differentiate between the effect of GO treatment and the potential loss in the tensile strength and tensile stiffness of fibres, authors report the data in 4 subclasses:</p> <ul> <li>As received flax yarns (dried at 60 C for 48 hr): labelled ‘as received’</li> <li>Kept in deionised water for 30 min: tagged ’30 min’</li> <li>Placed in deionised water for 24 hr: marked ’24 hr’</li> <li>Flax fibres immersed in 1.2 wt % GO aqueous dispersion for 24 hr: labelled ‘GO’</li> </ul> <p>Tensile test of single natural fibres is a challenging measurement. This is mainly due to the hierarchical and nonhomogenous structure of single fibres and difficulty in their extraction. The test methods are not standard, and the final data is very scattered. As an alternative method, we report the tensile properties of flax fibre bundles based on the impregnated fibre bundle test (IFBT) [1].</p> <p>Materials and brief description of the methodology can be found in the datasheet under ‘method’ tab. Flax fibre bundles were extracted from AmpliTex 5009 flax fabrics kindly provided by Bcomp. The matrix was Epikote 828 LVEL epoxy resin with Dytek DCH-99 hardener.</p> <p>Impregnated fibre bundle tests were performed with Instron 5567 and 30 kN loadcell, with 120 mm gauge length and 4% min <sup>-1</sup> strain rate. The strain was measured by a 50 mm clip-on extensometer. The abrasive paper was placed without glue in between the testing clamps and the samples. All samples were stored one week before test in a controlled environment of RH 50 % and 25 C.</p>
Data part of the manuscript Anaerobic methanotrophy is stimulated by graphene oxide in a brackish urban canal sediment
<p>We surveyed three canals in the city of Amsterdam (Netherlands) for it methane emissions and potential to filter methane through anaerobic oxidation of methane in the canal sediment. To unravel the mechanisms involved we characterised the sediment geochemically. All data present in the manuscript is available in the Excel file.</p>
Dataset of the paper "Improving the Stability of Photodoped Metal Oxide Nanocrystals with Electron Donating Graphene Quantum Dots"
<p>The dataset provides the data for the publication: "Improving the Stability of Photodoped Metal Oxide Nanocrystals with Electron Donating Graphene Quantum Dots"</p>
Molecular dynamics trajectories for "Structure and chemistry of graphene oxide in liquid water from first principles"
<p>This dataset contains molecular dynamics (MD) trajectories from the paper <a href="https://doi.org/10.1038/s41467-020-15381-y">“Structure and chemistry of graphene oxide in liquid water from first principles”, F. Mouhat, F.-X. Coudert and M.-L. Bocquet, <em>Nature Commun.</em>, <strong>2020</strong>, <em>11</em>, 1566, 10.1038/s41467-020-15381-y</a></p> <p> </p>
Universal behavior of low-temperature heat capacity of acrylonitrile-butadiene-styrene thermoplastic polymer and its composite with graphene oxide
<p>The low-temperature dependence of the heat capacity of acrylonitrile-butadiene-styrene (ABS) polymer and its composite with thermally reduced graphene oxide was studied. The existence of a so-called “boson peak” characteristic of orientational and structural glasses was demonstrated. The boson peak appears in the form of a local maximum in the heat capacity curve displayed as C/T<sup>3</sup> vs T at T<sub>max</sub> = 3.52 K. It was found that for both ABS polymer and its composite, as well as for a number of other substances of a crystalline and amorphous nature, the manifestation of the anomaly of the boson peak in the heat capacity has a universal character that is described by an empirical function Δ*. The value of Δ* depends on the magnitude of the anomaly in the heat capacity and the temperature of the boson peak manifestation. Thus, this study provides new physical information about the possible causes of the boson peak appearance in disordered materials and indicates the universality of boson peak anomaly for substances with short- and long-range order</p>
Data for 'Graphene oxide aerogels for gas phase adsorption and selective separation of aromatic hydrocarbons and cycloalkanes'
<p>### Selected experimental data for the 'Graphene oxide aerogels for gas phase adsorption and selective separation of aromatic hydrocarbons and cycloalkanes ###</p> <p>Authors of the manuscript related to the uploaded data:<br>1. Maksymilian Plata-Gryl, Department of Process Engineering and Chemical Technology, Faculty of Chemistry, Gdansk University of Technologym, email: maksymilian.plata-gryl@pg.edu.pl<br>2. Roberto Castro-Muñoz, Department of Sanitary Engineering, Faculty of Civil and Environmental Engineering, Gdansk University of Technology, email: food.biotechnology88@gmail.com<br>3. Emilia Gontarek-Castro, Department of Environmental Technology, Faculty of Chemistry, University of Gdansk<br>4. Alan Miralrio, Escuela de Ingeniería y Ciencias, Tecnologico de Monterrey<br>5. Grzegorz Boczkaj, Department of Sanitary Engineering, Faculty of Civil and Environmental Engineering, Gdansk University of Technology, email: grzegorz.boczkaj@pg.edu.pl</p> <p>Package contains following data:<br>1. Fourier-transform infrared spectra of rGOA, GO, and graphite samples, format: .csv, number of files: 5<br>2. Raman spectra of rGOA samples, format: .csv, number of files: 3<br>3. Low temperature nitrogen adsorption-desorption isotherms, format: .txt, number of files: 4<br>4. Raw chromatograms of test probes for rGOA samples, format .txt, number of files: 234 in 12 subfolders</p> <p>For more information about experimental conditions or data please see the manuscript/publication or contact author/s.</p>
Determination of antibacterial and photothermal properties of novel composites based on graphene oxide/reduced graphene oxide, gold nanoparticles, and graphene quantum dots
<p>HR-TEM.zip - HR-TEM files, file type .jpg</p> <p>FTIR.zip - FTIR spectra, file type .spa</p> <p>Photoluminescence.zip - PL spectra, file type .opju</p> <p>UV-Vis.opju - Origin file with UV-Vis spectra combined</p> <p>Raman 532 nm.opju - Origin file with Raman spectra combined</p> <p>ABDA.opju - Origin file with singlet oxygen production measurements</p> <p>Contact angle.png - Image with contact angle values</p> <p>Antibacterial analysis.png - Image representing antibacterial growth inhibition analysis</p> <p>XRD.zip - XRD spectra, file type .dat</p>
Supporting data for 'Chemically Reduced Graphene Oxide based Aerogels (rGOAs) - insight on the surface and textural functionalities dependent on handling the synthesis factors'
<p>Experimental data for the 'Chemically Reduced Graphene Oxide based Aerogels (rGOAs) - insight on the surface and textural functionalities dependent on handling the synthesis factors' manuscript/publication.</p> <p>Package contains following data:<br> 1. File with description of the experimental conditions for rGOAs synthesis, format: .pdf, number of files: 1 <br> 2. Data of Boehm titration for graphene oxide used for synthesis of rGOAs, format: .txt, number of files: 12<br> 3. Fourier-transform infrared spectra of rGOA samples and GO used for synthesis, format: .csv, number of files: 16<br> 4. Raw chromatograms of test probes for rGOA samples, format .txt, number of files: 15 folder with 11 files in each</p> <p> </p>
Gate-Tunable Spin Hall Effect in an All-Light-Element Heterostructure: Graphene with Copper Oxide
<p>Graphene is a light material for long-distance spin transport due to its low spin–orbit coupling, which at the same time is the main drawback for exhibiting a sizable spin Hall effect. Decoration by light atoms has been predicted to enhance the spin Hall angle in graphene while retaining a long spin diffusion length. Here, we combine a light metal oxide (oxidized Cu) with graphene to induce the spin Hall effect. Its efficiency, given by the product of the spin Hall angle and the spin diffusion length, can be tuned with the Fermi level position, exhibiting a maximum (1.8 ± 0.6 nm at 100 K) around the charge neutrality point. This all-light-element heterostructure shows a larger efficiency than conventional spin Hall materials. The gate-tunable spin Hall effect is observed up to room temperature. Our experimental demonstration provides an efficient spin-to-charge conversion system free from heavy metals and compatible with large-scale fabrication.</p>
Data from: Antibacterial activity of graphene oxide nanosheet against multi drug resistant superbugs isolated from infected patients
Graphene oxide (GO) is a derivative of graphene nanosheet which is the most promising material of the decade in biomedical research. In particular, it has been known as an antimicrobial nanomaterial with good biocompatibility. In this study, we have synthesized and characterize GO and checked its antimicrobial property against different Gram-negative and Gram-positive multi drug resistant (MDR) hospital superbugs grown in solid agar-based nutrient plates with and without human serum through the utilization of agar well diffusion method, live/dead fluorescent staining and genotoxicity analysis. The main focus of the antimicrobial activity analysis is to distinguish the killing performance of GO in artificial and blood containing media because after injection into the bloodstream the activity of GO may be modified by adsorption of blood proteins or other biomolecules. No significant changes in antibacterial activity were found in these two different conditions. We also compare the bactericidal capability of GO with some commonly administrated antibiotics and in all cases the degree of inhibition is found to be higher. The data presented here are novel and show that GO is an effective bactericidal agents against different superbugs and can be used as a future antibacterial agent.
Rapid synthesis and characterization of silver-loaded graphene oxide nanomaterials and their antibacterial applications
<p>All original data used in figures and tables of the manuscript are available in the dataset, which includes the X-ray diffraction, Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy, transmission electron microscopy, scanning electron microscopy with energy dispersion spectroscopy, zeta potential analysis and antibacterial properties measurement. Ultrasound was practically used in large-scale production of water-soluble silver/graphene oxide (Ag/GO) by reducing the silver ions (Ag+) attached to graphene oxide into silver nanoparticles. The infrared and X-ray photoelectron spectra indicated that there is a strong interaction between Ag and GO. The morphology analysis showed that AgNPs having a monodisperse size was well dispersed on the surface of the GO nanosheet. The zeta potential analysis showed that the Ag/GO nanomaterials suspension has high stability. In addition, the Ag/GO nanomaterials exhibited an effective antibacterial activity against Escherichia coli and Staphylococcus aureus.</p>
Step-wise reduction of graphene oxide using reactive MD
<p>We investigate step-wise reduction of graphene /graphite oxides using reactive molecular dynamics simulations. The visualized molecular configurations exemplify how the reduction occurs at elevated temperatures and ambient pressure.</p>
Replication Data for: Proton and molecular permeation through the basal plane of monolayer graphene oxide
<p>This dataset contains source data for main figures from "Proton and molecular permeation through the basal plane of monolayer graphene oxide, <i>Nature Communications, 2023</i>" Filenames of the .xlsx files correspond to the figure labels in the publication. Sheets within each file contain the plot information and the data plotted as curves and histograms in the main figures.</p>
Characterization of biologically reduced graphene oxide
<p>The attached figure contains the characterization of biologically reduced graphene oxide conducted through Raman spectroscopy, optical microscopy, particle size analyzer, and cyclic voltammetry.</p> <p>The samples used for Raman measurements are anaerobic sludge without graphene oxide (AS), anaerobic sludge with graphene oxide (AS+GO), and sterilized sludge with graphene oxide (SS+GO).</p> <p>For the laser particle size measurements, cyclic voltammetry, and optical microscope, samples of anaerobic sludge with and without GO were employed.</p>
Biochemical methane potential tests amended with graphene oxide and organic micropollutants: Methane production
<p>The spreadsheet comprises measurements of methane production of biochemical methane potential (BMP) assays amended with graphene oxide and organic micropollutants.</p> <p>A total of six sheets are present.</p> <p>“DOE (VS)” contains the design of the experiment with the initial set-up value for the different conditions tested.</p> <p>“Stock solution” where the concentrations of the added contaminants are calculated.</p> <p>“Inoculum-substrate” stores the characterization of the inoculum and the substrate used (i.e., microcrystalline cellulose).</p> <p>“Final_Character” contains the characterization measurements carried out at the end of the experiment.</p> <p>“Data” envelops the periodic (mostly daily) measurements used to calculate methane production via a manometric procedure.</p> <p>“Calculation” has the final calculation reporting the specific methane production (SMP) for the different conditions.</p>
Operational parameters of lab-scale anaerobic membrane bioreactors amended with graphene oxide
<p>The file contains the logbook with all the monitored parameters of a 5 L lab-scale anaerobic membrane bioreactor (AnMBR) fed with raw municipal wastewater collected from Girona’s wastewater treatment plant (Spain).</p> <p>The reactor was inoculated with anaerobic sludge and operated without modification until day 85, where a mix of organic micropollutants at 0.20 µM were dosed. Furthermore, on day 216, graphene oxide (GO) at 5 mg of GO per g of volatile solids (VS) was added to the AnMBR.</p>
Methane production data for fed-batch assays amended with graphene oxide and two standard substrates
<p>The spreadsheet contains all the data generated using the Automatic Methane Potential Tests System (AMPTS) for fed-batch experiments containing graphene oxide (GO) at 0, 5, 10, and 20 mg of GO per g of volatile solids (VS).</p> <p>Also, the dataset is divided accordingly to the two substrates used, i.e., glucose (G) and microcrystalline cellulose (C).</p>
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International Brain Laboratory public data
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OpenNeuro
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