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Showing 1 to 20 of 20 for “"Functionalized graphene"”.
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Functionalized Graphene: Characterization and Mechanical Reinforcement
… in this field is balancing these two factors. Graphene provides the possibility of producing high performance polymer nanocomposites but is too expensive for adoption in a wide variety of commercial applications. Currently, oxidation of graphite followed by reduction is the most cost effective …
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Biphasic Cellulose Acetate/Rtil Membranes And Functionalized Graphene Adsorbents For Natural Gas Processing: Experimental And Molecular Simulation Studies
… (silms), biphasic membranes, and nanoporous graphene (npg) and graphene oxide (npgo) membranes are studied. Biphasic membranes are proposed to overcome silms issues for gas separation. The major issues with silms are low room temperature ionic liquid (rtil) content and instability at high …
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Carbon Dioxide Capture With Amine Functionlized Graphene Oxide
Abstract: amine functionalized graphene oxide was used as sorbent in order to achieve carbon dioxide capture. In this study, micro size graphite flakes was prepared according to modified hummers method and "hummers' method with additional kmno4." Graphene oxide was then functionalized with …
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Incorporation of Carbon Nanoparticles in Polyaryletherketone Matrices for High Performance Liquid Chromatography Applications
… and internal defects. It was found that OH-functionalized graphene nano particles increased the moduli of PEEKCF30 and PEKEKKCF30 by 10.8% and 4.7% respectively. These results were considered statistically significant by hypothesis tests for a 95% confidence level. Further, a neat PEKKCF30 …
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Functionalization and Dispersion Stability Study of Graphene Materials in 2K Urethane Coating System and Expanded Interlayer Spacing of Vanadium Oxide Nanomaterials for Energy Storage Applications
… energy storage (V₂O₅) or corrosion protection (graphene). We took advantage of the hydrophobic and barrier properties present in graphene through including pristine and functionalized graphene materials in different 2K coating systems and observing their effects on corrosion protection. Vanadium …
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Graphene supported hafnium oxide nanopores for DNA sensing
… detection, ultra-thin membrane fabrication using graphene, and the exploration of alternative nanopore materials for biosensing applications. In this work, the development of a new solid-state nanopore sensor consisting of hafnium oxide suspended by functionalized graphene is reported along with …
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Understanding and designing carbon-based thermoelectric materials with atomic-scale simulations
… transport in carbon-based materials (e.g., graphene and crystalline C60 ), with the goal of providing insight into design rules for efficient carbon-based thermoelectric materials. We carried out a detailed atomistic study of thermal and charge transport in carbon-based materials using …
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Development of Nanotemplates and Nanomagnetic Materials for Data Storage Applications
… is developed by the functionalization of graphene (Chapter 4). The fabrication process can produce 40 nm openings of hexagonal in a polymer, which can be used as a mask to pattern other materials or as molds for filling other materials inside. This patterning technique might enable a more …
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Nanoscale Manipulation of Pristine and Functionalized Freestanding Graphene Using Scanning Tunneling Microscopy
<p>Over the past ten years the 2D material graphene has attracted an enourmous amount of attention from researchers from across diciplines and all over the world. Many of its outstanding electronic properties are present only when it is not interacting with a substrate but is instead freestanding. …
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Manufacturing, characterization, and modeling of graphene-based nanocomposites for aircraft structural and lightning strike applications
Research and development of graphene and graphene-based materials have been attracting significant interest since they were invented. This dissertation mainly focused on the graphene-based materials: (a) a fundamental understanding of nanosize functionalized graphene inclusions in resin and fiber …
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Graphene Oxide Reinforcement in Plasma Sprayed Nickel-5%Aluminum Coatings
… problem is to mix small amounts of inexpensive graphene oxide in the powder feedstock. The incredible strength to weight ratio of graphene oxide makes it a viable additive to improve mechanical properties of metallic plasma sprayed coatings. The powder system chosen for this research is …
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Fatigue and Fracture Behavior of Graphene-based Nanomaterials
… and cyclic loads. Known as "wonder material" graphene has demonstrated a great potential to be used in multifunctional nanostructures and nanodevices. However, after more than a decade of research, studies have reported the mechanical performance of graphene-based nanomaterials is far from the …
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Study of catalysts with high stability for proton exchange membrane fuel cells
… on two different kinds of carbon supports, nano graphene sheets and functionalized carbon black/graphene hybrid were developed by the liquid phase reaction. The crystal structure of two kinds of catalysts was characterized by X-ray diffractometer (XRD). The morphology and particle size were …
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Synthesis and applications of materials and polymers containing graphenic and/or triptycene moities
… Chapter 1: Three different types of epoxy-functionalized multiwalled carbon nanotubes (EpCNTs) were prepared via multiple covalent functionalizaton methods. The effect of the different chemistries on the adhesive properties of a nanocomposite prepared from commercial epoxy at 0.5, 1, 2, 3, …
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Electrical and mechanical properties of molecular junctions and nano surfaces
The behaviour of two graphene based structures has been theoretically investigated and analysed by using one or more tools. This tool kit consists firstly of SIESTA, a density functional theory software package, secondly Gollum, a non-equilibrium Green’s function code, and finally the tight binding …
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Geopolymer composites and their applications in stress wave mitigation
… and compared with various theoretical models. Graphene nanoplatelets have high mechanical, electrical and thermal properties that can significantly improve the desired properties of composites at even low contents. 1, 2 and 3 wt% of graphene nanoplatelet-reinforced, potassium geopolymers (GNP …
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Understanding and engineering molecular interactions and electronic transport at 2D materials interfaces
… considered include: (i) wetting behavior of graphene (micrometer scale), (ii) solution processing of graphene and graphene oxide (nanometer scale), and (iii) electronic modification in graphene and molybdenum disulfide (atomic scale). The first part of my thesis investigates the wetting …
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Measuring Nonlinear Properties of Graphene Thin Films Using Z-Scan Technique
… two-dimensional (2D) nanomaterials, specifically graphene, are very significant since graphene is finding its usefulness in handling the enormous heat in nanoscale high-density power electronics. Graphene has emerged to be a promising nanomaterial as an excellent heat spreader due to its high …
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Design and synthesis of functional graphenic and triptycene poli(arylether) materials
… describe an attempt to covalently functionalize graphene oxide with ketone derivatives via the Carroll rearrangement, a [3,3]-sigmatropic reaction. Graphene oxide was reacted with 5-acyl derivatives of Meldrum's acid to produce p-ketoester functionalized graphene, and these materials were …
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Fluorinated Graphene Oxide: structure, morphology and its potential use in biological applications
… an optimization for these drawbacks. Fluorinated Graphene Oxide (FGO) is reported for the first time as a potential multimodal contrast agent, drug carrier as well as a photothermal therapy. FGO is a sheet like material with oxygen and fluorine functional groups present in the structure, a …