Direct patterning of reduced graphene oxide/graphene oxide memristive heterostructures by electron-beam irradiation

Olesya, O. Kapitanova; Емелин, Е. В.; Dorofeev, S. G.; Евдокимов, П. В.; Panin, G. N.; Lee, Seung Joo; Lee, Sejoon

doi:10.1016/j.jmst.2019.07.042

Cited by 22 publications

(14 citation statements)

References 33 publications

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“…Graphene is a two-dimensional material that consists of a single layer of sp 2 carbon atoms [4,5]. Graphene oxide (GO) and reduced GO contain functional groups and a unique structure of the carbon basal plane, which contribute to its antibacterial activity.…”

Section: Introductionmentioning

confidence: 99%

Synergistic Antibacterial Activity of Silver-Loaded Graphene Oxide towards Staphylococcus Aureus and Escherichia Coli

et al. 2020

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In this study, the physicochemical and surface properties of the GO–Ag composite promote a synergistic antibacterial effect towards both Gram-negative Escherichia coli (E. coli) and Gram-positive Staphylococcus aureus (S. Aureus) bacteria. GO–Ag NPs have a better bactericidal effect on E. coli (73%) and S. Aureus (98.5%) than pristine samples (pure Ag or GO). Transmission electron microscopy (TEM) confirms that the GO layers folded entire bacteria by attaching to the membrane through functional groups, while the Ag NPs penetrated the inner cell, thus damaging the cell membrane and leading to cell death. Cyclic voltammetry (CV) tests showed significant redox activity in GO–Ag NPs, enabling good catalytic performance towards H2O2 reduction. Strong reactive oxygen species (ROS) in GO–Ag NPs suggests that ROS might be associated with bactericidal activity. Therefore, the synergy between the physicochemical effect and ROS production of this material is proposed as the mechanism of its antibacterial activity.

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Section: Introductionmentioning

confidence: 99%

Synergistic Antibacterial Activity of Silver-Loaded Graphene Oxide towards Staphylococcus Aureus and Escherichia Coli

et al. 2020

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“…Figure 3b shows a correlation between I ap and pH. Literature studies demonstrate that the EE2 redox process is strongly related to pH, for this compound solubility increases at a more basic pH, and is related to the proton transport process [29,31,42]. It is possible to notice that there is a shift of I ap to less positive potential values as the pH increases.…”

Section: Voltammetric Behavior Of Ee2mentioning

confidence: 82%

“…Synthetic urine samples were prepared according to the procedure reported in the literature [29][30][31]. To 50.00 mL of ultrapure water were added 0.06 g of CaCl 2 .2H 2 O, 0.08 g of KCl, 0.07 g of KH 2 PO 4 , 0.15 g of NaCl, 0.11 g of Na 2 SO 4 , 0.05 g of NH 4 Cl and 1.25 g of urea.…”

Section: Samples Preparationmentioning

confidence: 99%

“…The influence of concomitant species on the EE2 electroanalytical signal was carried out using species that are described on the literature studies [29,31,42,44]. The evaluated species (Figure S5) were ascorbic acid (AA), caffeine (CA), urea (Ure), estrone (E1), Cl À , NO 3 À , SO 4 2À , Na + , Mg 2 + , Pb 2 + e Fe 3 + in ratio of 1 : 10 (EE2: concomitant).…”

Section: Analytical Performance and Real Samplesmentioning

confidence: 99%

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Reduced Graphene Oxide‐based Sensor for 17α‐Ehinylestradiol Voltammetric Determination in Wastewater, Tablets and Synthetic Urine Samples

et al. 2022

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The following study reports the development of modified electrode with reduced graphene oxide (ErGO) for the voltammetric determination of 17α‐ethinylestradiol (EE2). The structural and morphological characterizations of the rGO were carried out by FTIR, Raman, UV‐Vis, TEM and SEM, and showed the typical formation of the nanomaterial. Electrochemical analyses were performed using Differential Pulse Voltammetry (DPV). Under optimized conditions, an analytical curve was generated for the sensor, which presented a linear dynamic range (LDR) from 0.04 to 8.28 μmol L−1 (R2=0.9999), with limit of detection (LOD) of 6.79 nmol L−1 and limit of quantification (LOQ) of 22.60 nmol L−1. The reproducibility and repeatability studies showed relative standard deviations (RSD) of 2.31 % and 5.23 %, respectively. ErGO was used to determine EE2 in wastewater, tablets, and synthetic urine samples with recovery values between 94.8 % and 110.1 %. The results obtained with ErGO show that the developed sensor can be used for the identification and quantification of EE2 in several matrices, due the excellent analytical performance presented.

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“…In addition to F 2g , the AC-CeO 2 nanocomposites display two additional Raman bands at 1345 and 1599 cm −1 , which are denoted by D and G bands, respectively. The G band originates the E 2g vibration mode of the sp 2 -hybridized carbon, and the D band sprouts from the defective and disordered features of graphite structures [66] , [67] , [68] , [69] , [70] . Such a simultaneous observation of F 2g and D/G depicts an effective hybridization of CeO 2 and AC in a nanocomposite system.…”

Section: Resultsmentioning

confidence: 99%

Enhanced photocatalytic crystal-violet degradation performances of sonochemically-synthesized AC-CeO2 nanocomposites

Sekar

Bathula

Rabani

et al. 2022

Ultrasonics Sonochemistry

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Direct patterning of reduced graphene oxide/graphene oxide memristive heterostructures by electron-beam irradiation

Cited by 22 publications

References 33 publications

Synergistic Antibacterial Activity of Silver-Loaded Graphene Oxide towards Staphylococcus Aureus and Escherichia Coli

Synergistic Antibacterial Activity of Silver-Loaded Graphene Oxide towards Staphylococcus Aureus and Escherichia Coli

Reduced Graphene Oxide‐based Sensor for 17α‐Ehinylestradiol Voltammetric Determination in Wastewater, Tablets and Synthetic Urine Samples

Enhanced photocatalytic crystal-violet degradation performances of sonochemically-synthesized AC-CeO2 nanocomposites

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