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Showing 1 to 19 of 19 for “"Doped graphene"”.
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Spin waves in doped graphene
… (xc) effects. We here consider spin waves in doped paramagnetic graphene with adjustable Zeeman-type band splitting. The spin waves are described using time-dependent spin-density-functional response theory, treating dynamical xc effects within the Slater and Singwi-Tosi-Land-Sjolander …
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Computational studies of electronic structure of doped graphene
… performed to study the electronic properties of doped graphene. This is due to the potentially large number of applications of graphene in p-n junctions, transistors, photodiodes and lasers. By utilizing single heteroatom chemical doping method or electric field-induced method, one can introduce …
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Laser Vaporization Methods for the Synthesis of Metal and Semiconductor Nanoparticles; Graphene, Doped Graphene and Nanoparticles Supported on Graphene
… of metal and semiconductor nanoparticles, graphene, B- and N-doped graphene, and metal and semiconductor nanoparticles supported on graphene. These methods include the Laser Vaporization Controlled Condensation (LVCC) approach, which has been used in this work for the synthesis of: (1) gold …
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Thermal properties of graphene
… have started analyzing these materials. Graphene, a two-dimensional allotrope of graphite with sp2 bonded carbon atoms, is arranged in honeycomb structure. Graphene has excellent thermal conductivity and can be considered as a potential material for applications in the electronics …
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Chemical Vapor Deposition Grown Pristine and Chemically Doped Monolayer Graphene
… to produce large-area, high-quality monolayer graphene on Cu substrates ever since its first demonstration in 2009. Pristine graphene grown in such a way owns the natures of zero charge carriers and zero band gap. As an analogy to semi-conductor studies, substitutional doping with foreign atoms …
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Iron (III) Chloride doping of large-area chemical vapor deposition graphene
… method of reducing the sheet resistance of graphene. This thesis aims to develop an effective method of doping large area Chemical Vapor Deposition (CVD) graphene using Iron (III) Chloride (FeCl 3). It is shown that evaporating FeCl3 can increase the carrier concentration of monolayer …
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CVD Grown Graphene-Based Materials: Synthesis, Characterization and Applications
Graphene draws a lot of attention due to its exceptional electrical, mechanical, thermal, optical and chemical properties. However, its zero bandgap is a limitation for electronics applications and its two-dimensional (2D) nature is a limitation for large scale, volumetric and macroscopic …
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Controlled doping of organic semiconductors and 2d materials with molecular reductants and oxidants
… used to surface modify mono- and multi-layer graphene, which shows a large decrease in the sheet resistance and tunable work function shifts. A subset of these molecules is applied to MoS2 and WSe2 to realize controllable n- and p-doping, respectively, to improve their electrical properties. …
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Low Temperature Electrical Transport in 2D Layers of Graphene, Graphitic Carbon Nitride, Graphene Oxide and Boron-Nitrogen-Carbon
… samples. For instance, high quality large area graphene and boron, nitrogen doped graphene (BNC) were grown using thermal catalytic chemical vapor deposition (CVD) method. Liquid phase exfoliation technique was utilized to exfoliate graphene and graphitic carbon nitride samples in isopropyl …
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Molecular Plasmonics: Graphene Plasmons in the Picoscale Limit
Doped graphene supports surface plasmons in the mid- to far-infrared that are both electrically and spatially tunable. Graphene has been shown to enable greater spatial confinement of the plasmon and fewer losses than typical noble metals. Reduced-dimensional graphene structures, including …
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Optical Characterization of chemically doped and/or intercalated thin layers graphene: Raman and Contrast Study
… the Raman and Contrast change in chemically doped and/or intercalated thin layers of graphene with halogen gases, FeCl₃ and alkali metals. The first chapter introduces graphene and graphite intercalation compounds (GICs). It will also briefly explain Raman of the graphitic compounds including …
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Yüksek enerji yoğunluğu gerektiren uygulamalar için grafen temelli monolit elektrotların üretilmesi, karakterizasyonu ve potansiyel uygulama alanlarının incelenmesi
… sonucuna varılmıştır. Since 3-dimensional (3D) graphene has high mechanical strength, surface area, electrical conductivity and ultra-low density energy storage systems are among the main applications. In the scope of this thesis, it is aimed to synthesize and characterize graphene-based …
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Quantum many body physics in single and bilayer graphene
… avenue for investigation of many body physics. Graphene constitutes a new and unusual 2DES, which may give rise to unexpected collective phenomena. However, the vanishing density of states in charge neutral single layer graphene suppresses many body effects, and one has to alter the system to …
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A General Interfacial Capacitance Model for Nanomaterial Supercapacitors: Insights from Computational Quantum Mechanics
… as those based on low-dimensional nanomaterials. Graphene- based supercapacitors are especially sensitive to quantum interactions since the electrode’s capacitance can be influenced by the presence of substrates, dopants, and/or electrolyte species. Conventional quantum-capacitance-based series …
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Graphene Decorated Substrates and Their Interfacial Characteristics
<p>Carbon nanotubes and graphene have been extensively studied for their excellent properties. As research on carbon expands, two major issues face the scientific community: (i) Expanding the scale of synthesis and (ii) Integration of different carbon structures for improved functionality. While …
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Two-dimensional Electronics: From Material Synthesis to Device Applications
… research interest in recent years. Among them, graphene and the semiconducting transition metal dichalcogenides (TMDs) are considered as promising candidates for future device applications due to their unique atomic thickness and outstanding properties. The study on graphene and TMDs has …
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Design and fabrication of non-noble-metal electrocatalysts for oxygen reduction reactions.
… a hierarchical pore structure. By incorporating graphene into this system, its electric conductivity can be enhanced. This is the first study to natively grow graphene on porous carbon. It is found that this material shows an excellent ORR performance with synergistically enhanced activities. …
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Decoration of graphene sheets with metal and metal oxide nanostructures by low-pressure plasma deposition
This thesis was dedicated to decorate graphene sheets with metal and metal oxide nanostructures by RF sputtering technique. Two main objectives were focused in this thesis. 1) To decorate graphene sheets uniformly with metal and metal oxide nanostructure without agglomeration. 2) To explore …