Bibliographies thématiques / Graphene - Physical Properties

Littérature scientifique sur le sujet « Graphene - Physical Properties »

Auteur : Grafiati
Publié le 7 septembre 2023

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Articles de revues sur le sujet "Graphene - Physical Properties"

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Wakabayashi, Katsunori. « Physical properties of nano-graphene ». TANSO 2010, no 243 (2010) : 116–20. http://dx.doi.org/10.7209/tanso.2010.116.

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Wakabayashi, Katsunori. « Physical properties of nano-graphene ». Carbon 48, no 14 (novembre 2010) : 4216. http://dx.doi.org/10.1016/j.carbon.2010.06.071.

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Murav’ev, V. V., et V. M. Mishchenka. « Ab-initio simulation of hydrogenated graphene properties ». Doklady BGUIR 19, no 8 (1 janvier 2022) : 5–9. http://dx.doi.org/10.35596/1729-7648-2021-19-8-5-9.

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Ab-initio simulation of hydrogenated graphene properties was performed. At present, graphene is considered one of the most promising materials for the formation of new semiconductor devices with good characteristics. Graphene has been the subject of many recent investigations due to its peculiar transport, mechanical and others properties [1]. The chemical modification of graphene named as graphane has recently entered the investigation as a possible candidate to solve problems connected with the lack of a graphene bandgap. Graphane is a compound material consisting of two-dimensional graphene bonded by some atoms of hydrogen. The investigation shows that graphane has the three valley Г-М-K band structure with the Г valley, which has the smallest energy gap between the conductivity zone and the valence zone. The calculation of relative electron masses and non-parabolic coefficients in Г, М and K valleys was performed. Based on the obtained characteristics, it is possible to implement a statistical multi-particle Monte Carlo method to determine the characteristics of electron transfer in heterostructure semiconductor devices. A research on modified graphene structures is important for fundamental science and technological applications in high-speed transistor structures operating in the microwave and very high frequency ranges.
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Wei, Weili, et Xiaogang Qu. « Extraordinary Physical Properties of Functionalized Graphene ». Small 8, no 14 (4 juin 2012) : 2138–51. http://dx.doi.org/10.1002/smll.201200104.

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Langston, Xavier, et Keith E. Whitener. « Graphene Transfer : A Physical Perspective ». Nanomaterials 11, no 11 (25 octobre 2021) : 2837. http://dx.doi.org/10.3390/nano11112837.

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Graphene, synthesized either epitaxially on silicon carbide or via chemical vapor deposition (CVD) on a transition metal, is gathering an increasing amount of interest from industrial and commercial ventures due to its remarkable electronic, mechanical, and thermal properties, as well as the ease with which it can be incorporated into devices. To exploit these superlative properties, it is generally necessary to transfer graphene from its conductive growth substrate to a more appropriate target substrate. In this review, we analyze the literature describing graphene transfer methods developed over the last decade. We present a simple physical model of the adhesion of graphene to its substrate, and we use this model to organize the various graphene transfer techniques by how they tackle the problem of modulating the adhesion energy between graphene and its substrate. We consider the challenges inherent in both delamination of graphene from its original substrate as well as relamination of graphene onto its target substrate, and we show how our simple model can rationalize various transfer strategies to mitigate these challenges and overcome the introduction of impurities and defects into the graphene. Our analysis of graphene transfer strategies concludes with a suggestion of possible future directions for the field.
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De Sanctis, Adolfo, Jake Mehew, Monica Craciun et Saverio Russo. « Graphene-Based Light Sensing : Fabrication, Characterisation, Physical Properties and Performance ». Materials 11, no 9 (18 septembre 2018) : 1762. http://dx.doi.org/10.3390/ma11091762.

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Graphene and graphene-based materials exhibit exceptional optical and electrical properties with great promise for novel applications in light detection. However, several challenges prevent the full exploitation of these properties in commercial devices. Such challenges include the limited linear dynamic range (LDR) of graphene-based photodetectors, the lack of efficient generation and extraction of photoexcited charges, the smearing of photoactive junctions due to hot-carriers effects, large-scale fabrication and ultimately the environmental stability of the constituent materials. In order to overcome the aforementioned limits, different approaches to tune the properties of graphene have been explored. A new class of graphene-based devices has emerged where chemical functionalisation, hybridisation with light-sensitising materials and the formation of heterostructures with other 2D materials have led to improved performance, stability or versatility. For example, intercalation of graphene with FeCl 3 is highly stable in ambient conditions and can be used to define photo-active junctions characterized by an unprecedented LDR while graphene oxide (GO) is a very scalable and versatile material which supports the photodetection from UV to THz frequencies. Nanoparticles and quantum dots have been used to enhance the absorption of pristine graphene and to enable high gain thanks to the photogating effect. In the same way, hybrid detectors made from stacked sequences of graphene and layered transition-metal dichalcogenides enabled a class of devices with high gain and responsivity. In this work, we will review the performance and advances in functionalised graphene and hybrid photodetectors, with particular focus on the physical mechanisms governing the photoresponse, the performance and possible future paths of investigation.
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Wei, Bing Wei, Dong Qu, Chun Feng Hu, Fang Zhi Li, Tian Liang Zhou, Rong Jun Xie et Zhi Ming Zhou. « Synthesis and Physical Properties of Graphene Nanosheets Reinforced Copper Composites ». Advanced Materials Research 833 (novembre 2013) : 310–14. http://dx.doi.org/10.4028/www.scientific.net/amr.833.310.

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Cu/graphene nanosheets composites were fabricated at 800°C by the hot-pressing method using Cu and graphene as initial materials. Graphene content was 1 wt. %-5 wt. %. The fracture morphology and physical properties of the composites were investigated. It was found that the relative density increased with the increment of graphene content from 1 wt% to 5 wt. % with reaching its highest level (96.68%) at 5wt. %. The composites have the anisotropic property which is vertical to the direction of pressure is higher than parallel to the direction of pressure. With the increasing of graphene content, the thermal conductivity property and the electronic conductivity decrease first and then increase with the minimum thermal conductivity and electric conductivity at 3wt%~4wt%.
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Fuhrer, Michael S., Chun Ning Lau et Allan H. MacDonald. « Graphene : Materially Better Carbon ». MRS Bulletin 35, no 4 (avril 2010) : 289–95. http://dx.doi.org/10.1557/mrs2010.551.

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AbstractGraphene, a single atom–thick plane of carbon atoms arranged in a honeycomb lattice, has captivated the attention of physicists, materials scientists, and engineers alike over the five years following its experimental isolation. Graphene is a fundamentally new type of electronic material whose electrons are strictly confined to a two-dimensional plane and exhibit properties akin to those of ultrarelativistic particles. Graphene's two-dimensional form suggests compatibility with conventional wafer processing technology. Extraordinary physical properties, including exceedingly high charge carrier mobility, current-carrying capacity, mechanical strength, and thermal conductivity, make it an enticing candidate for new electronic technologies both within and beyond complementary metal oxide semiconductors (CMOS). Immediate graphene applications include high-speed analog electronics and highly conductive, flexible, transparent thin films for displays and optoelectronics. Currently, much graphene research is focused on generating and tuning a bandgap and on novel device structures that exploit graphene's extraordinary electrical, optical, and mechanical properties.
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Hua, Lei. « Enhanced Physical Properties of PEO /GRAPHENE Composites ». Journal of Physics : Conference Series 1798, no 1 (1 février 2021) : 012010. http://dx.doi.org/10.1088/1742-6596/1798/1/012010.

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NORIMATSU, Wataru. « Structural and Physical Properties of Epitaxial Graphene ». Nihon Kessho Gakkaishi 61, no 1 (28 février 2019) : 35–42. http://dx.doi.org/10.5940/jcrsj.61.35.

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Thèses sur le sujet "Graphene - Physical Properties"

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Hills, Romilly D. Y. « Physical properties of graphene nano-devices ». Thesis, Loughborough University, 2015. https://dspace.lboro.ac.uk/2134/17993.

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In this doctoral thesis the two dimensional material graphene has been studied in depth with particular respect to Zener tunnelling devices. From the hexagonal structure the Hamiltonian at a Dirac point was derived with the option of including an energy gap. This Hamiltonian was then used to obtain the tunnelling properties of various graphene nano-devices; the devices studied include Zener tunnelling potential barriers such as single and double graphene potential steps. A form of the Landauer formalism was obtained for graphene devices. Combined with the scattering properties of potential barriers the current and conductance was found for a wide range of graphene nano-devices. These results were then compared to recently obtained experimental results for graphene nano-ribbons, showing many similarities between nano-ribbons and infinite sheet graphene. The methods studied were then applied to materials which have been shown to possess three dimensional Dirac cones known as topological insulators. In the case of Cd3As2 the Dirac cone is asymmetrical with respect to the z-direction, the effect of this asymmetry has been discussed with comparison to the symmetrical case.
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Dimov, Dimitar. « Fundamental physical properties of graphene reinforced concrete ». Thesis, University of Exeter, 2018. http://hdl.handle.net/10871/34648.

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The global warming has increased with unprecedented levels during the last couple of decades and the trend is uprising. The construction industry is responsible for nearly 10% of all carbon emissions, mainly due to the increasing global population and the large demand for housing and civil infrastructure. Concrete, which is the most used construction material worldwide, is found in every type of building as it provides long term structural stability, support and its main constituent cement, is very cheap. Consequently, due to the raising concerns of high average temperatures, the research community started investigating new, innovative methods for substituting cement with 'greener' materials whilst at the same time improving the intrinsic properties of concrete. However, the manufacturing complications and logistics of these materials make them unfavourable for industrial applications. A novel and truly revolutionary method of enhancing the performance of concrete, thus allowing for decreased consumption of raw materials, lies in nanoengineering the cement crystals responsible for the development of all mechanical properties of concrete. Graphene, a two-dimensional sheet of carbon atoms arranged in a hexagonal lattice, is the most promising nanomaterial for composites' reinforcement to this date, due to it's exceptional strength, ability to retain original shape after strain, water impermeability properties and non-hazardous large scale manufacturing techniques. I chose to investigate the addition of liquid-phase exfoliated graphene suspensions for concrete reinforcement, aiming to improve the fundamental mechanical properties of the construction material and therefore allowing the industry to design buildings using less volume of base materials. First, the method of liquid exfoliation of graphene was developed and the resulting water suspensions were fully characterised by Raman spectroscopy. Then, concrete samples were prepared according to British standards for construction and tested for various properties such as compressive and flexural strength, cyclic loading, water impermeability and heat transport. A separate, in-depth, study was carried out to understand the formation and propagation of micro-structural cracks between the concrete's internal matrix planes, and graphene's impact on total fracture capacity and resistance of concrete. Lastly, multiple experiments were performed to investigate the microcrystallinity of cement hydration products using X-Ray diffraction. In general, all experimental results show a consistent improvement in concrete's performance when enhanced with graphene on the nanoscale level. The nanomaterial improves the mechanical interlocking of cement crystal, thus strengthening the internal bonds of the composite matrix. This cheap and highly scalable method for producing and mixing graphene with concrete turns it into the first truly applicable method for industrial applications, with a real potential to have positive impact on the global warming by decreasing the production of concrete.
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Alsharari, Abdulrhman. « Tailoring Physical Properties of Graphene by Proximity Effects ». Ohio University / OhioLINK, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1525857318688345.

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Li, Hu. « Covalent Graphene Functionalization for the Modification of Its Physical Properties ». Doctoral thesis, Uppsala universitet, Institutionen för teknikvetenskaper, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-314176.

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Graphene, a two dimensional monolayer carbon sheet with the atoms tightly packed in a hexagonal lattice, has exhibited so many excellent properties, which enable graphene to break several material records with regard to carrier mobility, strength yield and thermal conductivity to name a few. Therefore, graphene has been placed as a potential candidate to allow truly next-generation material. Graphene is a zero band gap material, implying that an energy band gap around the Dirac point is supposed to be open to make graphene applicable as a semiconductor. Covalent bond graphene functionalization becomes an essential enabler to open the energy gap in graphene and extend graphene applications in electronics, while the densely packed hexagonal carbon atoms as well as the strong sp2 hybridization carbon-carbon bonds jointly result in a changeling topic of allowing graphene to be decorated with functional groups. Here in this thesis, different routes to realize graphene functionalizations are implemented by using physical and chemical ways. The physical functionalization methods are the ion/electron beam induced graphene fluorination as well as local defect insertion and the chemical ways correspond to the photochemistry techniques to approach hydrogenation and hydroxypropylation of graphene. Furthermore, to incorporate graphene into devices, the tuning of mechanical properties of graphene is desired. Towards this aim, the structure modification of graphene is employed to investigate the nanometer size-effect of crystalline size of graphene on the mechanical properties, namely Young’s modulus and surface energy. In the process of the graphene hydrogenation project, we discovered a high yield way to synthesis high quality graphene nanoscroll (GNS). Interestingly, the GNS shows superadhesion property through our atomic force microscopy measurements. This superadhesion is around 6-order stronger than van der Waals interaction and even higher than the hydrogen bonding enhanced and solid/liquid interfaces.
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Malec, Christopher Evan. « Transport in graphene tunnel junctions ». Diss., Georgia Institute of Technology, 2011. http://hdl.handle.net/1853/41140.

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It has been predicted that gold, aluminum, and copper do not fundamentally change the graphene band structure when they are in close proximity to graphene, but merely increase the doping. My data confirms this prediction, as well as explores other consequences of the metal/graphene interface. First, I present a technique to fabricate thin oxide barriers between graphene and aluminum and copper to create tunnel junctions and directly probe graphene in close proximity to a metal. I map the differential conductance of the junctions versus tunnel probe and back gate voltage, and observe mesoscopic fluctuations in the conductance that are directly related to the graphene density of states. I develop a simple theory of tunneling into graphene to extract experimental numbers, such as the doping level of the graphene, and take into account the electrostatic gating of graphene by the tunneling probe. Next, results of measurements in magnetic fields will also be discussed, including evidence for incompressible states in the Quantum Hall regime wherein an electron is forced to tunnel between a localized state and an extended state that is connected to the lead. The physics of this system is similar to that encountered in Single Electron Transistors, and some work in this area will be reviewed. Finally, another possible method of understanding the interface between a metal and graphene through transport is presented. By depositing disconnected gold islands on graphene, I am able to measure resonances in the bias dependent differential resistance, that I connect to interactions between the graphene and gold islands.
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Brogi, Lorenzo. « Effects of low-environmental impact graphene on paints : chemical and physical properties ». Master's thesis, Alma Mater Studiorum - Università di Bologna, 2021. http://amslaurea.unibo.it/24415/.

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Paints and varnishes industry is a well known sector of chemical industry and its importance is due to the need of surfaces colouring and protection (metals, wood, concrete) from many natural or artificial chemical or physical agents. This work is based on the formulation of new graphene-based paints and the analysis of their physical and chemical properties. Graphene is the bidimensional sp2 carbon nanomaterial with extraordinary properties as electron mobility, thermal conductivity, mechanical strength and large surface area [ (1), (2), (3), (4), (5) ]. Due to these properties, it’s used as additive in paints formulations to improve mechanical properties. Graphene-XT produces graphene by Liquid Phase Exfoliation (top-down approach) with a mechanical exfoliation in water environment, using only graphite and a non-toxic exfoliating agent/solvent, avoiding the common toxic solvents as 1-methyl-2pirrolidone (NMP) or cyclopentanone (CPO). Self-produced graphene was added to two types of paint to obtain products with different properties one from each other. In particular acrylic and teflon paints were used as bases with the addition of powder-graphene/graphene-ink. During this experimental thesis, three graphene-based paints were formulated: the first with the goal of improving hardness, adhesion, lubricant properties and mechanical resistance of the virgin teflon paint; the second was an adhesive and electrically acrylic conductive paint; the third was a formulation that increases some mechanical performances of a virgin acrylic paint. All the formulations were created and tested inside Graphene-XT laboratory, except for some test on the first formulation (third-part requested product).
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Baker, Taleb. « Molecular Computer Simulations of Graphene oxide intercalated with methanol : Swelling Properties and Interlayer Structure ». Thesis, Umeå universitet, Institutionen för fysik, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-135941.

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Robert, Pablo T. [Verfasser], et H. von [Akademischer Betreuer] Löhneysen. « Physical properties of carbon nanotube, graphene junctions / Pablo T. Robert. Betreuer : H. von Löhneysen ». Karlsruhe : KIT-Bibliothek, 2012. http://d-nb.info/1032243104/34.

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Orlando, Fabrizio. « Physical Properties and Functionalization of Low-Dimensional Materials ». Doctoral thesis, Università degli studi di Trieste, 2014. http://hdl.handle.net/10077/9968.

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2012/2013
Recent years have witnessed fast advancements in the research on graphene, which is one of the most active fields in condensed matter physics, chemistry and materials science. The rising interest of the scientific community in graphene, motivated by its fascinating properties and wide range of potential applications, has triggered substantial interest also on other two-dimensional (2D) atomic crystals, and particularly on hexagonal boron nitride (h-BN). In spite of much effort, a number of challenges still awaits the scientific community before the full potential of 2D atomic crystals can be exploited, such as the development of reliable methods for the growth of high-quality graphene and h-BN single layers or the possibility to tune the graphene electronic structure. The research activity I have been pursuing faces these requirements by focusing on the growth of graphene and h-BN on transition metal surfaces – which appears as the most direct route towards a scalable production of single layers with low concentration of defects – and the investigation of fundamental properties related to the presence of the metal support, but also tackles issues which have a direct link to the fabrication of carbonbased devices. In this regard, one of the first targets has been to shed light on the morphology and the electronic structure of h-BN on Ir(111), and to improve the growth strategy for the synthesis of high-quality h-BN layers. I have subsequently turned my attention to the fine tuning of graphene electronic properties by tailoring the graphene-substrate interaction through intercalation of foreign atoms at the metal interface. This was investigated in the extreme situations of weak (Ir) and strong (Ru) coupling of graphene with the metal support. I have also focused on an aspect which is related to a specific technological issue, that is, the development of an approach for the direct synthesis of graphene on insulating oxide layers. Lastly, the structural geometry of single layer graphene functionalized with nitrogen atoms, which is considered as one of the most promising approaches to manipulate graphene chemistry and induce n-doping, was also addressed. The combined use of several surface science experimental techniques has been proved to be of a powerful approach to achieve the targets of this project, having given access to the understanding of different properties of the systems under investigation.
XXVI Ciclo
1985
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Hocker, John-andrew Samuel. « Molecular and Performance Properties of Poly(Amides & ; Imides) and the Use of Graphene Oxide Nano-Particles for Improvement ». W&M ScholarWorks, 2016. https://scholarworks.wm.edu/etd/1477068376.

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Macroscopic properties of polymers, and in general all types of materials, are innately related to their molecular structure and intermolecular properties. This dissertation offers insight into how the molecular structure, chain properties, and inter-molecular chain interactions within PA11 can be used to explain and predict improved macro level performance properties; and how the addition of graphene oxide nanosheets enhances the performance properties of PA11 and polyimide(ODA-BTDA) through those same intermolecular interactions. Chapter 3 describes the unexpected result that weak small organic acids at low concentrations hydrolyze a polyamide at rates approximately twice that of a water HCl solution of the same pH at 100 ˚C and 120 ˚C under anaerobic conditions. Chapter 4 discusses how by varying the rate of Mm degradation with small organic acids the correlated effects of Mm and crystallinity upon the ultimate strain of PA11 were decoupled. The result demonstrates the need for both crystallinity and molecular weight knowledge to monitor and predict the ductile to brittle transition and when embrittlement occurs. Chapter 5 explores the elevated resistance to hydrolytic degradation and molecular properties that a graphene oxide (GO) loaded PA11 has compared with neat PA11 at 100 and 120 ˚C. The decreased rate of degradation and resulting 50 % increased equilibrium molecular weight of PA11 was attributed to the highly asymmetric planar GO nano-sheets that inhibited the molecular mobility of water and the polymer chain. The crystallinity of the polymer matrix was similarly affected by a reduction in chain mobility during annealing due to the GO nanoparticles’ chemistry and highly asymmetric nano-planar sheet structure. Chapter 6 extends the experimental work to effects on polyimides. GO and GO functionalized with 4-4’ oxydianiline (ODAGO) are incorporated at 0.01 to 0.10 wt% into a polyimide (PI) made from 3,3’-benzophenonetetracarboxylic dianhydride (BTDA) and 4-4’ oxydianiline (ODA). The performance properties of these two systems GOPI and ODAGO-PI at extremely low GO concentrations of 1 part per 10,000 are comparable to previous results citing concentrations 10 times higher and displayed significantly greater improvement than unfunctionalized GOPI films. The results suggest that the improved barrier properties are due a toruosity effect of the GO sheets and to a stabilizing effect of the flakes on the polymer matrix, where reduced mobility of the PI chain reduces diffusion through the polymer matrix. ATR-FTIR, WAXS, Raman and Tg results support this view.
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Livres sur le sujet "Graphene - Physical Properties"

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Li, Linfei. Fabrication and Physical Properties of Novel Two-dimensional Crystal Materials Beyond Graphene : Germanene, Hafnene and PtSe2. Singapore : Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-1963-5.

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Zabel, Hartmut. Graphite Intercalation Compounds II : Transport and Electronic Properties. Berlin, Heidelberg : Springer Berlin Heidelberg, 1992.

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3

Martin, Long, Stahl Mark et United States. National Aeronautics and Space Administration., dir. Synthesis, physical and chemical properties, and potential applications of graphite fluoride fibers. [Washington, DC] : National Aeronautics and Space Administration, 1987.

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service), SpringerLink (Online, dir. Graphene Nanoelectronics : Metrology, Synthesis, Properties and Applications. Berlin, Heidelberg : Springer Berlin Heidelberg, 2012.

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A, Teichman Louis, et Langley Research Center, dir. Optical properties of sputtered aluminum on graphite/epoxy composite material. Hampton, Va : National Aeronautics and Space Administration, Langley Research Center, 1989.

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Ting, Yu, Wu Yihong et Shen Zexiang. Two-Dimensional Carbon : Fundamental Properties, Synthesis, Characterization, and Applications. Pan Stanford Publishing, 2014.

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Li, Linfei. Fabrication and Physical Properties of Novel Two-dimensional Crystal Materials Beyond Graphene : Germanene, Hafnene and PtSe2. Springer, 2020.

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Li, Linfei. Fabrication and Physical Properties of Novel Two-Dimensional Crystal Materials Beyond Graphene : Germanene, Hafnene and PtSe2. Springer Singapore Pte. Limited, 2021.

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Saito, R., A. Jorio, J. Jiang, K. Sasaki, G. Dresselhaus et M. S. Dresselhaus. Optical properties of carbon nanotubes and nanographene. Sous la direction de A. V. Narlikar et Y. Y. Fu. Oxford University Press, 2017. http://dx.doi.org/10.1093/oxfordhb/9780199533053.013.1.

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This article examines the optical properties of single-wall carbon nanotubes (SWNTs) and nanographene. It begins with an overview of the shape of graphene and nanotubes, along wit the use of Raman spectroscopy to study the structure and exciton physics of SWNTs. It then considers the basic definition of a carbon nanotube and graphene, focusing on the crystal structure of graphene and the electronic structure of SWNTs, before describing the experimental setup for confocal resonance Raman spectroscopy. It also discusses the process of resonance Raman scattering, double-resonance Raman scattering, and the Raman signals of a SWNT as well as the dispersion behavior of second-order Raman modes, the doping effect on the Kohn anomaly of phonons, and the elastic scattering of electrons and photons. The article concludes with an analysis of excitons in SWNTs and outlines future directions for research.
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Graphite Intercalation Compounds II : Transport and Electronic Properties. Springer, 2011.

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Chapitres de livres sur le sujet "Graphene - Physical Properties"

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Wolf, E. L. « Physical and Electrical Properties of Graphene ». Dans Applications of Graphene, 1–18. Cham : Springer International Publishing, 2014. http://dx.doi.org/10.1007/978-3-319-03946-6_1.

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Krepel, Dana, et Oded Hod. « Physical Properties of Graphene Nanoribbons : Insights from First-Principles Studies ». Dans Graphene Chemistry, 51–77. Chichester, UK : John Wiley & Sons, Ltd, 2013. http://dx.doi.org/10.1002/9781118691281.ch4.

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Kravets, V. G., R. R. Nair, P. Blake, L. A. Ponomarenko, I. Riaz, R. Jalil, S. Anisimova, A. N. Grigorenko, K. S. Novoselov et A. K. Geim. « Optics of Flat Carbon – Spectroscopic Ellipsometry of Graphene Flakes ». Dans Physical Properties of Nanosystems, 3–9. Dordrecht : Springer Netherlands, 2010. http://dx.doi.org/10.1007/978-94-007-0044-4_1.

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Moharana, Srikanta, Bibhuti B. Sahu, Lipsa Singh et Ram Naresh Mahaling. « Graphene-Based Polymer Composites : Physical and Chemical Properties ». Dans Defect Engineering of Carbon Nanostructures, 159–97. Cham : Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-030-94375-2_7.

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Mondal, Titash, Anil K. Bhowmick, Ranjan Ghosal et Rabindra Mukhopadhyay. « Graphene-Based Elastomer Nanocomposites : Functionalization Techniques, Morphology, and Physical Properties ». Dans Designing of Elastomer Nanocomposites : From Theory to Applications, 267–318. Cham : Springer International Publishing, 2016. http://dx.doi.org/10.1007/12_2016_5.

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Singh, Ramesh Kumar, Naresh Nalajala, Tathagata Kar et Alex Schechter. « Functionalization of Graphene—A Critical Overview of its Improved Physical, Chemical and Electrochemical Properties ». Dans Carbon Nanostructures, 139–73. Cham : Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-30207-8_6.

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Ilyasov, Victor V., Besik C. Meshi, Nguyen V. Chuong, Igor V. Ershov, Inna G. Popova et Nguyen D. Chien. « Modulation the Band Structure and Physical Properties of the Graphene Materials with Electric Field and Semiconductor Substrate ». Dans Springer Proceedings in Physics, 279–97. Cham : Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-26324-3_20.

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Koshino, Mikito, et Tsuneya Ando. « Electronic Properties of Monolayer and Multilayer Graphene ». Dans Physics of Graphene, 173–211. Cham : Springer International Publishing, 2013. http://dx.doi.org/10.1007/978-3-319-02633-6_6.

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Hatsugai, Yasuhiro, et Hideo Aoki. « Graphene : Topological Properties, Chiral Symmetry and Their Manipulation ». Dans Physics of Graphene, 213–50. Cham : Springer International Publishing, 2013. http://dx.doi.org/10.1007/978-3-319-02633-6_7.

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Sun, Xiaowei, Miao Gao, Honghong Zhou, Jing Lv et Zhaoyang Ding. « Influence of Fiber on Properties of Graphite Tailings Foam Concrete ». Dans Lecture Notes in Civil Engineering, 508–15. Singapore : Springer Singapore, 2022. http://dx.doi.org/10.1007/978-981-19-1260-3_46.

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AbstractThe project used graphite tailings as a filler to prepare graphite tailings foamed concrete. Mainly studied the physical properties, mechanical properties and thermal properties of the foam concrete by graphite tailings, also studied the combination of polypropylene fiber and glass fiber influence of foam concrete compressive strength and cracking strength. The experimental results show that in the case of the same dry density grade, adding 20% graphite tailings can make the foam concrete strength reach its peak. When the water-binder ratio is 0.65 and the self-made chemical foaming agent content is 7%, the optimal total fiber volume blending rate is 0.18%, and the blending ratio of polypropylene fiber and glass fiber is 2:1. The compounding of polypropylene fiber and glass fiber can improve the flexural performance of foam concrete, which is not conducive to the thermal insulation performance of foam concrete, but the test results are still better than industry standards.
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Actes de conférences sur le sujet "Graphene - Physical Properties"

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Russo, P., D. Acierno, F. Capezzuto, G. G. Buonocore, L. Di Maio et M. Lavorgna. « Thermoplastic polyurethane/graphene nanocomposites : The effect of graphene oxide on physical properties ». Dans THE SECOND ICRANET CÉSAR LATTES MEETING : Supernovae, Neutron Stars and Black Holes. AIP Publishing LLC, 2015. http://dx.doi.org/10.1063/1.4937308.

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Atasever, Ö., M. D. Özdemir, B. Özdemir, Z. Yarar et M. Özdemir. « Calculation of electronic properties of multilayer graphene with Monte Carlo method ». Dans 9TH INTERNATIONAL PHYSICS CONFERENCE OF THE BALKAN PHYSICAL UNION (BPU-9). AIP Publishing LLC, 2016. http://dx.doi.org/10.1063/1.4944166.

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Alali Almaadeed, Mariam, Noorunnisa Khanam Patan, Mabrouk Ouederni, Eileen Harkin Jones et Beatriz Mayoral. « New Processing Technique To Improve Physical And Mechanical Properties Of Graphene Nanocomposites ». Dans Qatar Foundation Annual Research Conference Proceedings. Hamad bin Khalifa University Press (HBKU Press), 2014. http://dx.doi.org/10.5339/qfarc.2014.eepp0726.

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Adigoppula, Vinay K., Waseem Khan, Rajib Anwar, Avni A. Argun et R. Asmatulu. « Graphene Based Nafion® Nanocomposite Membranes for Proton Exchange Membrane Fuel Cells ». Dans ASME 2011 International Mechanical Engineering Congress and Exposition. ASMEDC, 2011. http://dx.doi.org/10.1115/imece2011-62751.

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Nanocomposite proton-exchange membranes are fabricated by loading graphene nanoflakes into perfluoro sulfonic acid polymer (Nafion) solutions at controlled amounts (1–4 wt%) followed by electrical and thermal characterization of the resulting membranes. Electronic and ionic conductivity values of the nanocomposites, as well as their dielectric and thermal properties improve at increased graphene loadings. Owing to graphene’s exceptionally high surface area to volume ratio and excellent physical properties, these nanocomposite are promising candidates for proton-exchange membrane fuel cell applications.
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Jin Taek Choi, Kwang Sun Ryu, Hyung-il Lee, Han Mo Jeong, Cheol Min Shin et Jung Ho Kim. « Functionalized graphene sheet/polyurethane nanocomposites : Effect of particle size on the physical properties ». Dans 2010 International Forum on Strategic Technology (IFOST). IEEE, 2010. http://dx.doi.org/10.1109/ifost.2010.5668002.

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Tsegaye, Mikiyas S., Patrick E. Hopkins, Avik W. Ghosh et Pamela M. Norris. « Calculating the Phonon Modes of Graphene Using the 4th Nearest Neighbor Force Constant Method ». Dans ASME 2008 International Mechanical Engineering Congress and Exposition. ASMEDC, 2008. http://dx.doi.org/10.1115/imece2008-66726.

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Graphite has always been a very important material both industrially and academically due to its physical structure. But ever since the isolation of Graphene (a single sheet of Graphite) a few years ago, it’s been one of the most widely studied molecular systems for its potential applications in nano-electronics and other break-through areas. Some of the desirable traits of Graphene are its high thermal and electronic mobility, and its low noise properties. This paper outlines a standard method for calculating phonon dispersion curves in Graphene by making use of force constant measurements. This information is usually obtained from approximations of inter-atomic potentials, which involve derivatives of simplified potential approximations between every atom in Graphene to get the force constant tensors. In this paper, the measured values for the force constants are used in a mathematically rigorous way to calculate the Graphene phonon dispersion curves.
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JURMANOVÁ, Jana, Ondřej JAŠEK, Jozef TOMAN, Miroslav ŠNÍRER et Michal KALINA. « INFLUENCE OF ELECTRON BEAM IRRADIATION ON PHYSICAL PROPERTIES OF MICROWAVE PLASMA SYNTHESIZED GRAPHENE NANOSHEETS ». Dans NANOCON 2019. TANGER Ltd., 2020. http://dx.doi.org/10.37904/nanocon.2019.8453.

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Wang, Tianyu, Dayu Li, Yicen Hou et Guixin Zhang. « Molecular Dynamics Simulation of Key Physical Properties of Graphene Oxide / Epoxy Resin Nanocomposite Dielectrics ». Dans 2020 IEEE International Conference on High Voltage Engineering and Application (ICHVE). IEEE, 2020. http://dx.doi.org/10.1109/ichve49031.2020.9279620.

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ANILAL, ASHISH, JUSTIN BENDESKY, SEHEE JEONG, STEPHANIE S. LEE et MICHAEL BOZLAR. « EFFECTS OF GRAPHENE ON TWISTING OF HIGH DENSITY POLYETHYLENE ». Dans Proceedings for the American Society for Composites-Thirty Seventh Technical Conference. Destech Publications, Inc., 2022. http://dx.doi.org/10.12783/asc37/36468.

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High density polyethylene (HDPE) is known to form banded spherulites when crystallized from the melt. In such spherulites, concentric bands of alternating light and dark colors emanating from the spherulite nucleation center are observable between cross polarizers and appear as a function of the anisotropy of the dielectric susceptibility as crystal orientations continuously rotate about the growth direction. Recently, we identified PE to be a promising compound to induce twisting in conjugated carbonaceous systems, such as triisopropylsilylethynyl anthradithiophene (TIPS ADT). When blended together in ratios between 10 – 70 wt.% PE, TIPS ADT and PE crystals twist in concert with one another to form composite films of intertwined helicoidal fibrils. In this work, we investigate crystal twisting in HDPE-graphene oxide composites. In addition to its unique multifunctionality, graphene has also recently demonstrated peculiar twisting capabilities that strongly alter its physical properties. Here, we first produce graphene sheets through the chemical oxidation of natural graphite, and then investigate the influence of graphene on the twisting of HDPE composites under various processing parameters (graphene concentration, polymer cooling rate, etc). HDPE-graphene composites have been prepared using melt extrusion in the form of microfibers and films. We measured the influence of twisting on the mechanical and electrical properties of the composites, as well as the crystallographic structure using optical and electron microscopy, and X-Ray diffraction spectroscopy.
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She, Juncong, Yuan Huang, Wenjie Yang, Weiliang Wang, Zhibing Li, Shaozhi Deng et Ningsheng Xu. « Reduced graphene oxide cold cathodes : Preparation, actively-controlled field emission properties and the related physical mechanism ». Dans 2012 IEEE Thirteenth International Vacuum Electronics Conference (IVEC). IEEE, 2012. http://dx.doi.org/10.1109/ivec.2012.6262104.

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Rapports d'organisations sur le sujet "Graphene - Physical Properties"

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Eklund, P. C. Microscopic physical and chemical properties of graphite intercalation compounds. Office of Scientific and Technical Information (OSTI), août 1992. http://dx.doi.org/10.2172/6977572.

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Carroll, Mark C. Initial Comparison of Baseline Physical and Mechanical Properties for the VHTR Candidate Graphite Grades. Office of Scientific and Technical Information (OSTI), septembre 2014. http://dx.doi.org/10.2172/1168626.

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Strizak, Joe P., Timothy D. Burchell et Will Windes. Status of Initial Assessment of Physical and Mechanical Properties of Graphite Grades for NGNP Appkications. Office of Scientific and Technical Information (OSTI), décembre 2011. http://dx.doi.org/10.2172/1030608.

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Eklund, P. C. Microscopic physical and chemical properties of graphite intercalation compounds. Final report, August 1, 1984--July 31, 1985. Office of Scientific and Technical Information (OSTI), août 1992. http://dx.doi.org/10.2172/10182617.

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Babkin, Vladyslav V., Viktor V. Sharavara, Volodymyr V. Sharavara, Vladyslav V. Bilous, Andrei V. Voznyak et Serhiy Ya Kharchenko. Using augmented reality in university education for future IT specialists : educational process and student research work. CEUR Workshop Proceedings, juillet 2021. http://dx.doi.org/10.31812/123456789/4632.

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The article substantiates the feature of using augmented reality (AR) in university training of future IT specialists in the learning process and in the research work of students. The survey of university teachers analyzed the most popular AR applications for training future IT specialists (AR Ruler, AR Physics, Nicola Tesla, Arloon Geometry, AR Geometry, GeoGebra 3D Graphing Calculator, etc.), disclose the main advantages of the applications. The methodological basis for the implementation of future IT specialists research activities towards the development and use of AR applications is substantiated. The content of the activities of the student’s scientific club “Informatics studios” of Borys Grinchenko Kyiv University is developed. Students as part of the scientific club activity updated the mobile application, and the model bank corresponding to the topics: “Polyhedrons” for 11th grade, as well as “Functions, their properties and graphs” for 10th grade. The expediency of using software tools to develop a mobile application (Android Studio, SDK, NDK, QR Generator, FTDS Dev, Google Sceneform, Poly) is substantiated. The content of the stages of development of a mobile application is presented. As a result of a survey of students and pupils the positive impact of AR on the learning process is established.
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