Thematische Bibliographien / Functionalized Graphenes

Inhaltsverzeichnis

  1. Zeitschriftenartikel
  2. Dissertationen
  3. Bücher
  4. Buchteile
  5. Konferenzberichte
  6. Berichte der Organisationen

Auswahl der wissenschaftlichen Literatur zum Thema „Functionalized Graphenes“

Autor: Grafiati
Veröffentlicht am 18. Mai 2024

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Zeitschriftenartikel zum Thema "Functionalized Graphenes"

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Tene, Talia, Stefano Bellucci, Marco Guevara, Fabian Arias Arias, Miguel Ángel Sáez Paguay, John Marcos Quispillo Moyota, Melvin Arias Polanco et al. „Adsorption of Mercury on Oxidized Graphenes“. Nanomaterials 12, Nr. 17 (31.08.2022): 3025. http://dx.doi.org/10.3390/nano12173025.

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Graphene oxide (GO) and its reduced form, reduced graphene oxide (rGO), are among the most predominant graphene derivatives because their unique properties make them efficient adsorbent nanomaterials for water treatment. Although extra-functionalized GO and rGO are customarily employed for the removal of pollutants from aqueous solutions, the adsorption of heavy metals on non-extra-functionalized oxidized graphenes has not been thoroughly studied. Herein, the adsorption of mercury(II) (Hg(II)) on eco-friendly-prepared oxidized graphenes is reported. The work covers the preparation of GO and rGO as well as their characterization. In a further stage, the description of the adsorption mechanism is developed in terms of the kinetics, the associated isotherms, and the thermodynamics of the process. The interaction between Hg(II) and different positions of the oxidized graphene surface is explored by DFT calculations. The study outcomes particularly demonstrate that pristine rGO has better adsorbent properties compared to pristine GO and even other extra-functionalized ones.
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Tene, Talia, Fabian Arias Arias, Marco Guevara, Juan Carlos González García, Melvin Arias Polanco, Andrea Scarcello, Lorenzo S. Caputi, Stefano Bellucci und Cristian Vacacela Gomez. „Adsorption Kinetics of Hg(II) on Eco-Friendly Prepared Oxidized Graphenes“. Coatings 12, Nr. 8 (10.08.2022): 1154. http://dx.doi.org/10.3390/coatings12081154.

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Extra-functionalized oxidized graphenes are widely preferred for the removal of different pollutants, however, removal with pristine oxidized graphenes, i.e., graphene oxide (GO) and reduced graphene oxide (rGO) is vaguely explored. Herein, we report a comparative adsorption kinetics study of the removal of mercury(II) (Hg(II)) from water using eco-friendly prepared GO and rGO. This work consists of the synthesis protocol and the corresponding morphological and spectroscopical characterization of the obtained pristine adsorbents as well as the adsorption mechanism in terms of initial concentration, removal percentage, pseudo-first and pseudo-second-order models, intraparticle diffusion study, and pH analysis. In particular, scanning electron microscope (SEM) and transmission electron microscope (TEM) images evidence the presence of thin sheets with some defects on the GO structure, these defects substantially disappear in rGO, after reduction. Raman spectrum of rGO shows a less intense D* peak which is attributed to the diamond-like carbon phase. Most importantly, the equilibrium adsorption time in GO is 10 min with a removal percentage of ~28% while in rGO it is 20 min with a removal percentage of ~75%. The adsorption process of Hg(II) either in GO or rGO is more in line with the pseudo-second-order model, suggesting that the adsorption kinetics could be controlled by chemisorption. Our results evidence the interesting adsorbing properties of pristine oxidized graphenes and are expected to be useful for the proposal and study of non-extra functionalized graphene-based materials for water treatment.
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Xu, Hangxun, und Kenneth S. Suslick. „Sonochemical Preparation of Functionalized Graphenes“. Journal of the American Chemical Society 133, Nr. 24 (22.06.2011): 9148–51. http://dx.doi.org/10.1021/ja200883z.

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Moon, Hyun Gon, und Jin Hae Chang. „Syntheses and Characterizations of Functionalized Graphenes and Reduced Graphene Oxide“. Polymer Korea 35, Nr. 3 (31.05.2011): 265–71. http://dx.doi.org/10.7317/pk.2011.35.3.265.

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Mojica-Sánchez, Juan Pablo, Víctor Manuel Langarica-Rivera, Kayim Pineda-Urbina, Jorge Nochebuena, Gururaj Kudur Jayaprakash und Zeferino Gómez Sandoval. „Adsorption of glyphosate on graphene and functionalized graphenes: A DFT study“. Computational and Theoretical Chemistry 1215 (September 2022): 113840. http://dx.doi.org/10.1016/j.comptc.2022.113840.

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Hu, Bo, Lingdi Liu, Yanxu Zhao und Changli Lü. „A facile construction of quaternized polymer brush-grafted graphene modified polysulfone based composite anion exchange membranes with enhanced performance“. RSC Advances 6, Nr. 56 (2016): 51057–67. http://dx.doi.org/10.1039/c6ra06363b.

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Novel quaternized polymer brush-functionalized graphenes (QPbGs) were synthesized and a series of composite anion exchange membranes for alkaline fuel cells were fabricated by incorporating different amounts of QPbGs into quaternized polysulfone.
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Heo, Cheol, und Jin-Hae Chang. „Syntheses and Characterizations of Position Specific Functionalized Graphenes“. Polymer Korea 37, Nr. 2 (25.03.2013): 218–24. http://dx.doi.org/10.7317/pk.2013.37.2.218.

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Huang, Wenyi, Xilian Ouyang und L. James Lee. „High-Performance Nanopapers Based on Benzenesulfonic Functionalized Graphenes“. ACS Nano 6, Nr. 11 (29.10.2012): 10178–85. http://dx.doi.org/10.1021/nn303917p.

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Li, Yuanzhen, Liying Zhang und Chao Wu. „Uncertainty in the separation properties of functionalized porous graphenes“. Applied Surface Science 525 (September 2020): 146524. http://dx.doi.org/10.1016/j.apsusc.2020.146524.

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Tene, Talia, Stefano Bellucci, Marco Guevara, Edwin Viteri, Malvin Arias Polanco, Orlando Salguero, Eder Vera-Guzmán et al. „Cationic Pollutant Removal from Aqueous Solution Using Reduced Graphene Oxide“. Nanomaterials 12, Nr. 3 (18.01.2022): 309. http://dx.doi.org/10.3390/nano12030309.

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Reduced graphene oxide (rGO) is one of the most well-known graphene derivatives, which, due to its outstanding physical and chemical properties as well as its oxygen content, has been used for wastewater treatment technologies. Particularly, extra functionalized rGO is widely preferred for treating wastewater containing dyes or heavy metals. Nevertheless, the use of non-extra functionalized (pristine) rGO for the removal of cationic pollutants is not explored in detail or is ambiguous. Herein, pristine rGO—prepared by an eco-friendly protocol—is used for the removal of cationic pollutants from water, i.e., methylene blue (MB) and mercury-(II) (Hg-(II)). This work includes the eco-friendly synthesis process and related spectroscopical and morphological characterization. Most importantly, the investigated rGO shows an adsorption capacity of 121.95 mg g−1 for MB and 109.49 mg g−1 for Hg (II) at 298 K. A record adsorption time of 30 min was found for MB and 20 min for Hg (II) with an efficiency of about 89% and 73%, respectively. The capture of tested cationic pollutants on rGO exhibits a mixed physisorption–chemisorption process. The present work, therefore, presents new findings for cationic pollutant adsorbent materials based on oxidized graphenes, providing a new perspective for removing MB molecules and Hg(II) ions.
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Dissertationen zum Thema "Functionalized Graphenes"

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Bhattacharya, Suchandra. „New catalytic applications of functionalized graphenes and metal embedded organic polymer“. Thesis, University of North Bengal, 2020. http://ir.nbu.ac.in/handle/123456789/4363.

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Haberer-Gehrmann, Danny. „Electronic Properties of Functionalized Graphene Studied With Photoemission Spectroscopy“. Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2012. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-97417.

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Graphene, a two dimensional single layer of graphite, attracts a lot of attention of researchers around the globe due to its remarkable physical properties and application potential. The origin can thereby be found in the peculiar electronic structure since graphene is a zero gap semi-conductor with a linear energy dispersion in the vicinity of the Fermi level. Consequently, the charge carriers in graphene mimic massless Dirac Fermions which brings principles of quantum electrodynamics and exotic effects like Klein tunneling into a bench-top experiment. Modifying the electronic and/or crystal structure structure by functionalization might therefore as well lead to new tantalizing physical properties, novel compound materials based on graphene like graphane (fully hydrogenated graphene) or flourographene (fluorinated graphene), and ultimately new applications. In this work, the influences on the electronic structure of graphene are investigated with photoemission spectroscopies after covalent functionalization by atomic hydrogen and ionic functionalization with potassium. Regarding hydrogenation, the formation of tunable bandgap is observed along with a full recovery of the electronic properties of graphene upon removing the hydrogen by thermal annealing. Using high resolution x-ray photoemission and molecular dynamics simulations, the formation of a C4H structure is predicted for substrate supported graphene at a saturation H-coverage of 25%, due to a preferential para- arrangement of hydrogen atoms. In fully electron doped, hydrogenated graphene the formation of dispersionless hydrogen impurity state is observed with angle-resolved photoemission spectroscopy. This flat state is extended over the whole Brillouin zone and according to calculations not localized. Potassium-doped graphene shows a similar doping level as its 3D parent component, the graphite intercalation compound KC8. Investigating the electron-phonon coupling in doped graphene, by direct derivation of the Eliashberg-function, shows an asymmetric coupling strength along the high-symmetry directions in the Brillouin Zone of graphene. In the K-M direction additional low energetic contributions could be identified which may originate from out-of-plane phonon modes. Regarding the electron-phonon-coupling strength of the high energy in-plane phonon modes a reasonable agreement with theoretical predictions is found.
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Bointon, Thomas H. „Graphene and functionalised graphene for flexible and optoelectric applications“. Thesis, University of Exeter, 2015. http://hdl.handle.net/10871/17620.

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The landscape of consumer electronics has drastically changed over the last decade. Technological advances have led to the development of portable media devices, such as the iPod, smart phones and laptops. This has been achieved primarily through miniaturisation and using materials such as Lithium and Indium Tin Oxide (ITO) to increase energy density in batteries and as transparent electrodes for light emitting displays respectively. However, ten years on there are now new consumer demands, which are dictating the direction of research and new products are under constant development. Graphene is a promising next-generation material that was discovered in 2004. It is composed of a two-dimensional lattice made only from carbon. The atoms are arranged in a two atom basis hexagonal crystal structure which forms a fundamental building block of all sp2 hybrid forms of carbon. The production of large area graphene has a high cost, due to the long growth times and the high temperatures required. This is relevant as graphene is not viable compared to other transparent conductors which are produced on industrial scales for a fraction of the cost of graphene growth. Furthermore, graphene has a high intrinsic resistivity (2KW/_) which is three orders of magnitude greater than the current industry standard ITO. This limits the size of the electrodes as there is dissipation of energy across the electrode leading to inefficiency. Furthermore a potential drop occurs across the electrode leading to a non-uniform light emission when the electrode is used in a light emitting display. I investigate alternative methods of large area graphene growth with the aim of reducing the manufacturing costs, while maintaining the quality required for graphene human interface devices. Building on this I develop new fabrication methods for the production of large-area graphene devices which are flexible and transparent and show the first all graphene touch sensor. Focusing on the reducing the high resistivity of graphene using FeCl3 intercalation, while maintaining high optical transmission, I show low resistivity achieved using this process for microscopic graphene flakes, large-area graphene grown on silicon carbide and large-area graphene grown by CVD. Furthermore, I explore the stability of FeCl3 intercalated graphene and a process to transfer a material to arbitrary flexible substrates.
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Sapkota, Indra Prasad. „Tunable band gap in functionalized epitaxial graphene“. DigitalCommons@Robert W. Woodruff Library, Atlanta University Center, 2013. http://digitalcommons.auctr.edu/dissertations/709.

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Graphene is a two-dimensional system consisting of a single planar layer of carbon atoms with hexagonal arrangement. Various approaches have been proposed to control its physical and electronic properties. Graphite intercalation compounds are materials formed by inserting molecular layers of compounds between stacked sheets of graphene. We have studied the physical and electronic responses of two graphene layers intercalated with gold cluster. Quasi free-standing graphene with Dirac fermion behavior has been recently demonstrated through gold intercalated epitaxial graphene. Herein, we investigate the electronic characteristics of gold-intercepted epitaxial graphene under a perpendicularly applied electric field. Evolution of the band structure of intercalated epitaxial graphene as a function of the bias is investigated by means of density-functional theory including interlayer van der Waals interactions. Our results indicate that goldintercalated epitaxial graphene can lead to tunable band gap with the applied bias, which is important for future device. Hexagonal boron-nitride (fc-BN) is an ideal substrate for graphene due to its dielectric, insulating, and polarizing features. Our first-principles investigation reveals that the interaction of the /i-BN substrate with graphene induces a band gap. The zigzagedged graphene and /i-BN nanoribbon possess intrinsic half-metalicity, whereas the reconstructed edges with heptagonal and pentagonal alterations yield metallic states. The application of a transverse electric bias to a graphene boron nitride nanoribbon (GBNNR) promotes a transition from exhibiting semiconducting states to half metallic properties while GBNNR with reconstructed edges undergo transition from metallic to semiconducting properties.
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Lin, Ziyin. „Functionalized graphene for energy storage and conversion“. Diss., Georgia Institute of Technology, 2014. http://hdl.handle.net/1853/51871.

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Graphene has great potential for energy storage and conversion applications due to its outstanding electrical conductivity, large surface area and chemical stability. However, the pristine graphene offers unsatisfactory performance as a result of several intrinsic limitations such as aggregation and inertness. The functionalization of graphene is considered as a powerful way to modify the physical and chemical properties of graphene, and improve the material performance, which unfortunately still being preliminary and need further knowledge on controllable functionalization methods and the structure-property relationships. This thesis aims to provide in-depth understanding on these aspects. We firstly explored oxygen-functionalized graphene for supercapacitor electrodes. A mild solvothermal method was developed for graphene preparation from the reduction of graphene oxide; the solvent-dependent reduction kinetics is an interesting finding in this method that could be attributed to the solvent-graphene oxide interactions. Using the solvothermal method, oxygen-functionalized graphene with controlled density of oxygen functional groups was prepared by tuning the reduction time. The oxygen-containing groups, primarily phenols and quinones, reduce the graphene aggregation, improve the wetting properties and introduce the pseudocapacitance. Consequently, excellent supercapacitive performance was achieved. Nitrogen-doped graphene was synthesized by the pyrolysis of graphene oxide with nitrogen-containing molecules and used as an electrocatalyst for oxygen reduction reactions. We achieved the structural control of the nitrogen-doped graphene, mainly the content of graphitic nitrogen, by manipulating the pyrolysis temperature and the structure of nitrogen-containing molecules; these experiments help understand the evolution of the bonding configurations of nitrogen dopants during pyrolysis. Superior catalytic activity of the prepared nitrogen-doped graphene was found, due to the enriched content of graphitic nitrogen that is most active for the oxygen reduction reaction. Moreover, we demonstrated a facile strategy of producing superhydrophobic octadecylamine-functionalized graphite oxide films. The long hydrocarbon chain in octadecylamine reduces the surface energy of the graphene oxide film, resulting in a high water contact angle and low hysteresis. The reaction mechanism and the effect of hydrocarbon chain length were systematically investigated. In addition to the researches on graphene-based materials, some results on advanced carbon nanomaterials and polymer composites for electronic packaging will also be discussed as appendix to the thesis. These include carbon nanotube-based capacitive deionizer and gas sensor, and hexagonal boron nitride-epoxy composites for high thermal conductivity underfill.
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Plachinda, Pavel. „Electronic Properties and Structure of Functionalized Graphene“. PDXScholar, 2012. https://pdxscholar.library.pdx.edu/open_access_etds/585.

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The trend over the last 50 years of down-scaling the silicon transistor to achieve faster computations has led to doubling of the number of transistors and computation speed over about every two years. However, this trend cannot be maintained due to the fundamental limitations of silicon as the main material for the semiconducting industry. Therefore, there is an active search for exploration of alternate materials. Among the possible candidates that can may [sic] be able to replace silicon is graphene which has recently gained the most attention. Unique properties of graphene include exceedingly high carrier mobility, tunable band gap, huge optical density of a monolayer, anomalous quantum Hall effect, and many others. To be suitable for microelectronic applications the material should be semiconductive, i.e. have a non-zero band gap. Pristine graphene is a semimetal, but by the virtue of doping the graphene surface with different molecules and radicals a band gap can be opened. Because the electronic properties of all materials are intimately related to their atomic structure, characterization of molecular and electronic structure of functionalizing groups is of high interest. The ab-inito (from the first principles) calculations provide a unique opportunity to study the influence of the dopants and thus allow exploration of the physical phenomena in functionalized graphene structures. This ability paves the road to probe the properties based on the intuitive structural information only. A great advantage of this approach lies in the opportunity for quick screening of various atomic structures. We conducted a series of ab-inito investigations of graphene functionalized with covalently and hapticly bound groups, and demonstrated possible practical usage of functionalized graphene for microelectronic and optical applications. This investigation showed that it is possible [to] produce band gaps in graphene (i.e., produce semiconducting graphene) of about 1 eV, without degrading the carrier mobility. This was archived by considering the influence of those adducts on electronic band structure and conductivity properties.
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Hewa-Bosthanthirige, Mihiri Shashikala. „Structural and electronics properties of noncovalently functionalized graphene“. DigitalCommons@Robert W. Woodruff Library, Atlanta University Center, 2013. http://digitalcommons.auctr.edu/dissertations/1286.

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Recent experimental work has demonstrated production of quasi free-standing graphene by methane intercalation. The intercalation weakens the coupling of adjacent graphene layers and yields Dirac fermion behaviour of monolayer graphene. We have investigated the electronic characteristics of methane intercepted graphene bilayer under a perpendicularly applied electric field. Evolution of the band structure of intercalated graphene as a function of the bias is studied by means of density-functional theory including interlayer van der Waals interactions. The implications of controllable band gap opening in methane-intercalated graphene for future device applications are discussed. Noncovalent functionalization provides an effective way to modulate the electronic properties of graphene. Recent experimental work has demonstrated that hybrids of dipolar phototransductive molecules tethered to graphene are reversibly tunable in doping. We have studied the electronic structure characteristics of chromophore/graphene hybrids using dispersion-corrected density functional theory. The Dirac point of noncovalently functionalized graphene shifts upward via cis-trans isomerism, which is attributed to a change in the chromophore's dipole moment. Our calculation results reveal that the experimentally observed reversible doping of graphene is attributed to the change in charge transfer between the light-switchable chromophore and graphene via isomerization. Furthermore, we show that by varying the electric field perpendicular to the supramolecular functionalized graphene, additional tailoring of graphene doping can be accomplished.
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Pham, Van Dong. „STM characterization of functionalized carbon nanotubes and graphene“. Sorbonne Paris Cité, 2015. http://www.theses.fr/2015USPCC245.

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Dans cette thèse, nous avons étudié l'interaction entre des molécules organiques et des nanomatériaux de carbone. En utilisant un microscope à effet tunnel (STM) à basse température et sous ultra-vide, nous avons mesuré les propriétés de molécules de porphyrine physisorbées sur du graphène ou des nanotubes de carbone. Nous avons d'abord étudié l'injection d'électrons dans le graphène sur des défauts (joints de grains et atomes d'azote insérés). Une étude d'états image résonants nous a également permis de mettre en évidence une variation locale du travail de sorite dans le graphène dopé. Nous avons ensuite étudié les propriétés de molécules de porphyrine (H2TPP) adsorbées sur une surface Au(111). En utilisant la pointe du microscope nous avons induit des réactions de tautomérisation et de déshydrogénation et montré comment cela modifie les états moléculaires et l'interaction molécule-surface. Nous avons ensuite étudié l'interaction du graphène avec des molécules de porphyrine. Nous avons montré que le couplage électronique est faible entre les molécules et le graphène. Nous avons ensuite montré comment un atome d'azote inséré dans le réseau de carbone du graphène modifie l'interaction molécule-surface. Une diminution de l'énergie des états moléculaires au niveau des sites dopants révèle un transfert de charge partiel entre les sites d'azote et les molécules. Dans la dernière partie, nous avons étudié les propriétés de nanotubes de carbone monoparois fonctionnalisés par un polymère de porphyrine. Les mesures ont révélé que le polymère couvre partiellement les nanotubes. La spectroscopie locale a indiqué que la densité d'états locale est modifiée au niveau du polymère
In this thesis we studied the interaction between organic molecules and carbon nanomaterials. Using scanning tunneling microscopy (STM) at low temperature and in ultra-high vacuum, we measured the properties of porphyrin molecules at the surface of graphene and single-walled carbon nanotubes. We first studied electron injection in graphene at defect sites (grain boundaries and nitrogen doping atoms). Using image-potential states, we evidenced the variation of local work function in doped graphene. Secondly, we investigated the properties of free-base porphyrin (H2TPP) molecules adsorbed on a Au(111) surface. We performed tip-induced tautomerization and dehydrogenation of the molecules, and revealed how these operations modify the molecular states and molecule-substrate interaction. Following these two preliminary studies, we studied the interaction of graphene with porphyrin molecules. We evidenced a weak electronic coupling between the molecules and graphene. We then showed how a nitrogen dopant on doped graphene can tune the molecule-surface interaction. The comparison between molecules adsorbed on nitrogen doping sites with those adsorbed on carbon sites clearly reveals a downshift of the energy of the molecular states at the doping sites. This downshift reveals a partial electron transfer from the nitrogen sites of graphene to the adsorbed molecules. In the last part of this thesis, we studied the properties of single-walled carbon nanotubes functionalized with a porphyrin polymer. The STM measurements revealed that the polymer is partially covering the nanotubes. Local spectroscopy indicated that the local density of states are modified at the polymer location
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Arbuzov, A. A., V. E. Muradyan, B. P. Tarasov und E. A. Sokolov. „Preparation of Amino-Functionalized Graphene Sheets and their Conductive Properties“. Thesis, Sumy State University, 2013. http://essuir.sumdu.edu.ua/handle/123456789/35639.

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Amino-functionalized graphene sheets were prepared through chemical reduction by hydrazine hy-drate, amination or amidation of graphite oxide. For amination of graphite oxide were used polyamine such as ethylenediamine, diethylenetriamine and triethylenetetramine. Addition of amine groups to graphene is identified by Fourier transform infrared spectroscopy, Raman spectroscopy, elemental analysis and ther-mogravimetry. Scanning electron microscopy data indicate that the organic amine is not only as nitrogen sources to obtain the nitrogen-doped graphene but also as an important modification to control the assem-bly of graphene sheets in the 3D structures. The electrical conductivity of the materials obtained by amina-tion and amidation of graphene is much smaller than that of reduced graphite oxide. When you are citing the document, use the following link http://essuir.sumdu.edu.ua/handle/123456789/35639
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Jeon, Intak. „Synthesis of functionalized few layer graphene via electrochemical expansion“. Thesis, Massachusetts Institute of Technology, 2015. http://hdl.handle.net/1721.1/101797.

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Thesis: S.M., Massachusetts Institute of Technology, Department of Materials Science and Engineering, 2015.
This electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.
Cataloged from student-submitted PDF version of thesis.
Includes bibliographical references (pages 59-62).
Single layer graphene is a nearly transparent two-dimensional honeycomb sp2 hybridized carbon lattice, and has received immense attention for its potential application in next-generation electronic devices, composite materials, and energy storage devices. This attention is a result of its desirable and intriguing electrical, mechanical, and chemical properties. However, mass production of high-quality, solution-processable graphene via a simple low-cost method remains a major challenge. Recently, electrochemical exfoliation of graphite has attracted attention as an easy, fast, and environmentally friendly approach to the production of high-quality graphene. This route solution phase approach complements the original micromechanical cleavage production of high quality graphite samples and also involved a chemically activated intermediate state that facilitates functionalization. In this thesis we demonstrate a highly efficient electrochemical exfoliation of graphite in organic solvent containing tetraalkylammonium salts, avoiding oxidation of graphene and the associated defect generation encountered with the broadly used Hummer's method. The expansion and charging of the graphite by intercalation of cations facilitates the functionalization of the graphene basal surfaces. Electrochemically enhanced diazonium functionalization of the expanded graphite was performed. The exfoliated graphene platelets were analyzed by Raman spectroscopy, to quantify defect states and the degree of exfoliation. Additional microscopy techniques provided additional insight into the chemical state and structure of the graphene sheets.
by Intak Jeon.
S.M.
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Bücher zum Thema "Functionalized Graphenes"

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Polymer Functionalized Graphene. Cambridge: Royal Society of Chemistry, 2021. http://dx.doi.org/10.1039/9781788019675.

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Nandi, Arun Kumar. Polymer Functionalized Graphene. Royal Society of Chemistry, The, 2021.

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Nandi, Arun Kumar. Polymer Functionalized Graphene. Royal Society of Chemistry, The, 2021.

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Nandi, Arun Kumar. Polymer Functionalized Graphene. Royal Society of Chemistry, The, 2021.

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Functionalized Graphene Nanocomposites and their Derivatives. Elsevier, 2019. http://dx.doi.org/10.1016/c2017-0-00309-9.

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Jawaid, Mohammad, Abou el Kacem Qaiss und Rachid Bouhfid. Functionalized Graphene Nanocomposites and Their Derivatives: Synthesis, Processing and Applications. Elsevier, 2018.

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Functionalized Graphene Nanocomposites and Their Derivatives: Synthesis, Processing and Applications. Elsevier, 2018.

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Buchteile zum Thema "Functionalized Graphenes"

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Azcarate, Iban, David Lachkar, Emmanuel Lacôte, Jennifer Lesage de la Haye und Anne-Laure Vallet. „Functionalized Graphenes“. In Chemistry of Organo-Hybrids, 36–68. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2015. http://dx.doi.org/10.1002/9781118870068.ch2.

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Yang, Minghui, Chunyan Wang, Qin Wei, Bin Du, He Li und Zhiyong Qian. „Functionalized Graphene for Biosensing Applications“. In Biosensor Nanomaterials, 221–35. Weinheim, Germany: Wiley-VCH Verlag GmbH & Co. KGaA, 2011. http://dx.doi.org/10.1002/9783527635160.ch11.

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Shanmugapriya, V., S. Arunpandiyan, G. Hariharan und A. Arivarasan. „Functionalized Graphene and its Derivatives for Industrial Energy Storage“. In Functionalized Nanomaterials Based Supercapacitor, 533–67. Singapore: Springer Nature Singapore, 2023. http://dx.doi.org/10.1007/978-981-99-3021-0_22.

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Karaman, Merve, Eyyup Yalcin, Abdelkhalk Aboulouard und Mustafa Can. „Graphene Edge Structures: Folding, Tubing, and Twisting“. In Handbook of Functionalized Carbon Nanostructures, 1–39. Cham: Springer International Publishing, 2023. http://dx.doi.org/10.1007/978-3-031-14955-9_12-1.

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5

Sohal, Neeraj, Banibrata Maity und Soumen Basu. „Size-Dependent Properties of Graphene Quantum Dots“. In Handbook of Functionalized Carbon Nanostructures, 1–32. Cham: Springer International Publishing, 2023. http://dx.doi.org/10.1007/978-3-031-14955-9_3-1.

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6

Gadtya, Ankita Subhrasmita, Kalim Deshmukh und Srikanta Moharana. „Geometric and Electronic Properties of Graphene Nanoribbons“. In Handbook of Functionalized Carbon Nanostructures, 1–39. Cham: Springer International Publishing, 2024. http://dx.doi.org/10.1007/978-3-031-14955-9_7-1.

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7

Kiran, Ifrah, Naveed Akhtar Shad, M. Munir Sajid, Yasir Jamil, Yasir Javed, M. Irfan Hussain und Kanwal Akhtar. „Graphene Functionalized PLA Nanocomposites and Their Biomedical Applications“. In Graphene Based Biopolymer Nanocomposites, 83–105. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-9180-8_5.

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Henna, T. K., K. P. Nivitha, V. R. Raphey, Chinnu Sabu und K. Pramod. „Functionalized Graphene for Drug Delivery Applications“. In Carbon Nanostructures, 247–78. Singapore: Springer Singapore, 2019. http://dx.doi.org/10.1007/978-981-32-9057-0_11.

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9

Fu, Li. „Cyclodextrin Functionalized Graphene and Its Applications“. In Carbon Nanostructures, 193–213. Singapore: Springer Singapore, 2019. http://dx.doi.org/10.1007/978-981-32-9057-0_8.

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10

Mishra, Ranjana, und Ankit Manral. „Graphene Functionalized Starch Biopolymer Nanocomposites: Fabrication, Characterization, and Applications“. In Graphene Based Biopolymer Nanocomposites, 173–89. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-9180-8_9.

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Konferenzberichte zum Thema "Functionalized Graphenes"

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Diouf, D., und R. Asmatulu. „Silanized Graphene-Based Nanocomposite Coatings on Fiber Reinforced Composites Against the Environmental Degradations“. In ASME 2014 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/imece2014-39818.

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This report presents the development of graphene-based nanocomposite coatings on the fiber reinforced composites to improve the coating resistance against the corrosion and other environmental weathering. Graphene nanoflakes were initially functionalized through a silanization process, and then dispersed well into the polyurethane primer and top coats at 0, 2, 4 and 8wt% using high speed agitation and sonication processes. The dispersed nanocomposite coatings were an air sprayed on the surfaces of the composite coupons at different thicknesses, and cured prior to the alternative UV and salt fog exposure tests for 20 days. The performance analyses of the nanocomposite coatings were carried out using atomic force microscopy (AFM), Fourier transform infrared spectrometer (FTIR), thickness measurements, water contact angle, and electro-chemical impedance spectroscopy tests. The test results indicated that the silanization process on the graphene nanoflakes significantly improved the corrosion resistances of the nanocomposite coatings when compared to the non-functionalized graphenes. This study may be useful for the performance improvements of many coatings on the composite aircraft, wind turbines and other applications.
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2

Tachikawa, Hiroto, Tetsuji Iyama und Hiroshi Kawabata. „Molecular design of functionalized fullerenes and graphenes: Density functional theory (DFT) study“. In 2016 Compound Semiconductor Week (CSW) [Includes 28th International Conference on Indium Phosphide & Related Materials (IPRM) & 43rd International Symposium on Compound Semiconductors (ISCS)]. IEEE, 2016. http://dx.doi.org/10.1109/iciprm.2016.7528697.

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3

Iyama, Tetsuji, Hiroshi Kawabata, Takahiro Fukuzumi und Hiroto Tachikawa. „Electronic states of organic radical-functionalized graphenes and fullerenes: Density functional theory (DFT) study“. In 2016 Compound Semiconductor Week (CSW) [Includes 28th International Conference on Indium Phosphide & Related Materials (IPRM) & 43rd International Symposium on Compound Semiconductors (ISCS)]. IEEE, 2016. http://dx.doi.org/10.1109/iciprm.2016.7528698.

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Dogadina, E., R. D. Rodriguez, M. Fatkullin, A. Lipovka, A. Kozelskaya, S. Tverdohlebov und E. Sheremet. „Implant Electronics with Functionalized Graphene“. In Четвертая российская конференция «ГРАФЕН: МОЛЕКУЛА И 2D-КРИСТАЛЛ». NIIC SB RAS, 2023. http://dx.doi.org/10.26902/graphene-23-035.

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Rigosi, Albert F., Mattias Kruskopf, Alireza R. Panna, Shamith U. Payagala, Dean G. Jarrett, David B. Newell und Randolph E. Elmquist. „Metrological Suitability of Functionalized Epitaxial Graphene“. In 2020 Conference on Precision Electromagnetic Measurements (CPEM 2020). IEEE, 2020. http://dx.doi.org/10.1109/cpem49742.2020.9191783.

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McLaughlin, Adam, und Byungki Kim. „Fabrication and Fracture Test of Functionalized Graphene-PETI 5 Composite“. In ASME 2014 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/imece2014-38018.

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The development of a composite cryogenic fuel tank is desirable for the creation of a reusable single-stage launch vehicle. The cyclic loading and temperature changes experienced during launch and re-entry conditions result in the microcracking of conventional composites. To increase the fracture strength of this composite, a property often limited by the matrix, the nanoplatelet known as graphene or exfoliated graphite, has been introduced. Three nanocomposites were produced using graphene and Phenylethynyl Terminated Imide oligomer (PETI-5). The nanocomposites were machined in to flexure samples and tested at room temperature. Results from these tests indicate that the ideal concentration of graphene in our PETI-5 nanocomposite is 0.08%.
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Liang, Yupei, Ning An, Teng Tan, Fan Tang, Yunjiang Rao und Baicheng Yao. „Ultra-sensitive gas detection based on graphene microcomb“. In Optical Fiber Sensors. Washington, D.C.: Optica Publishing Group, 2023. http://dx.doi.org/10.1364/ofs.2023.w4.60.

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Leveraging the sub-comb merging effect, we realized a microcomb-based gas sensor in a graphene-functionalized microcavity. The sub-comb heterodyne measurement enables ultra-sensitive gas detection of down to 4 ppb level.
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Somboon, Kantika, Nattakarn Hongsriphan und Pajaera Patanathabutr. „Influence of functionalized graphene and processing condition on electrical property of polyamide 11/functionalized graphene cast films“. In THE 7TH INTERNATIONAL CONFERENCE ON ENGINEERING, APPLIED SCIENCES AND TECHNOLOGY: (ICEAST2021). AIP Publishing, 2021. http://dx.doi.org/10.1063/5.0064068.

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MAHMUD, HASHIM AL, ,. MATTHEW RADUE, WILLIAM PISANI und GREGORY ODEGARD. „COMPUTATIONAL MODELING OF EPOXY-BASED HYBRID COMPOSITES REINFORCED WITH CARBON FIBERS AND FUNCTIONALIZED GRAPHENE NANOPLATELETS“. In Thirty-sixth Technical Conference. Destech Publications, Inc., 2021. http://dx.doi.org/10.12783/asc36/35846.

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The impact on the mechanical properties of unidirectional carbon fiber (CF)/epoxy composites reinforced with pristine graphene nanoplatelets (GNP), highly concentrated graphene oxide (GO), and Functionalized Graphene Oxide (FGO) are investigated in this study. The localized reinforcing effect of each of the graphene nanoplatelet types on the epoxy matrix is predicted at the nanoscale-level by molecular dynamics. The bulk-level mechanical properties of unidirectional CF/epoxy hybrid composites are predicted using micromechanics techniques considering the reinforcing function, content, and aspect ratios for each of the graphene nanoplatelets. In addition, the effect of nanoplatelets dispersion level is also investigated for the pristine graphene nanoplatelets considering a lower dispersion level with four layers of graphene nanoplatelets (4GNP). The results indicate that the shear and transverse properties are significantly affected by the nanoplatelet type, loading and aspect ratio. The results of this study can be used in the design of hybrid composites to tailor specific laminate properties by adjusting nanoplatelet parameters.
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Franca, Jose Romão, Guilherme Max Dias Ferreira, Gabriel Max Dias Ferreira, Raphael Longuinhos und Jenaina Ribeiro-Soares. „Synthesis and optical characterization of graphene oxide-functionalized biochars for boron incorporation“. In Latin America Optics and Photonics Conference. Washington, D.C.: Optica Publishing Group, 2022. http://dx.doi.org/10.1364/laop.2022.th1d.3.

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Biochars are biomass-derived, aromatic-to-nanographene-like carbonaceous materials studied as fertilizers precursors. Graphene oxide-functionalized coffee husk biochars presented Raman and infrared results indicating crystallite size and functional group changes suitable to its use in boron micronutrient fertilizers.
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Berichte der Organisationen zum Thema "Functionalized Graphenes"

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Plachinda, Pavel. Electronic Properties and Structure of Functionalized Graphene. Portland State University Library, Januar 2000. http://dx.doi.org/10.15760/etd.585.

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