Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 34 for “"Graphene Nanoribbon"”.
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Atomically precise single Graphene Nanoribbon transistor
Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2027-05-01
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INVESTIGATION OF ELECTRIC AND THERMOELECTRIC PROPERTIES OF GRAPHENE NANORIBBON
… down to 20nm are patterned by directly modifying graphene strips through surface sputtering by helium ions. The temperature dependent conductance measurements on supported Graphene Field Effect Transistors (GFETs) show an estimated energy gap of 13mev for 60nm wide GNR. In addition, we also …
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Uniaxial Strain Effect on Graphene-Nanoribbon Resonant Tunneling Transistors
Graphene is an atomically thin two-dimensional (2-D) crystal with unique thermal, mechanical, and electronic transport properties such as the high mobility of carriers, perfect 2- D confinement and linear dispersion, etc., has been attracted many interest as a promising candidate for nano-scale …
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Nanosoldering carbon nanotube fibers and graphene nanoribbon thin film transistors
… of carbon. We work with carbon nanotubes and graphene nanoribbons. The first part involves using carbon nanotubes (CNTs) to build composite structures such as fibers. In the past, our group developed the “nanosoldering” technique to solder carbon nanotube junctions which significantly improved …
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Development of spintronics devices and Type 1 heterojunctions from graphene nanoribbon superlattices
Graphene physics and edge effects have a substantial influence on the electronic structure of graphene based nanomaterials. In this work, a detailed investigation of the edge effects of graphene nanoribbon superlattices is implemented in order to guide the discovery, design, and development of …
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Device and circuit-level models for carbon nanotube and graphene nanoribbon transistors
… nanotube field-effect transistors (CNTFETs) and graphene nanoribbon field-effect transistors (GNRFETs) for future nanoelectronics. The investigation explores the potential of these amazing carbon structures that exceed MOSFET capabilities in term of speed, scalability and power consumption. The …
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Analysis of transport properties in a zaz graphene nanoribbon junction using various dopants
A 12 atom wide ZAZ Graphene Junction was simulated and its transport properties were analyzed. I-V curves, calculated by nonequilibrium Greens function method combined with the density functional theory under external bias, showed varying semiconducting characteristics. Further, the width of the …
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The electronic characterization of a type 9A graphene nanoribbon using scanning tunneling microscopy and spectroscopy
Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2027-05-01
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Physical Modeling of Graphene Nanoribbon Field Effect Transistor Using Non-Equilibrium Green Function Approach for Integrated Circuit Design
… circuits. The Ph.D. dissertation focuses on graphene, one atomic layer of carbon sheet, experimentally discovered in 2004. Since fabrication technology of emerging materials is still in early stages, transistor modeling has been playing an important role for evaluating futuristic …
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Scanning tunneling microscopy investigation of atomically precise graphene nanoribbons
… the dry contact transfer of atomically precise graphene nanoribbons onto H:Si(100) under ultra-high vacuum, detailed electronic characterization, and electron-mediated polymerization of graphene nanoribbon precursors into polyanthrylene. Detailed scanning tunneling microscopy (STM) and scanning …
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Quantum transport in graphene nanotransistors
Over the past decade, interest in using graphene in condensed-matter physics and materials science applications has exploded, owing to its unique electrical properties. Narrow strips of graphene, called graphene nanoribbons, also display exotic behavior. A nanoribbon’s edge geometry determines its …
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Next-Generation Flash Memories Using Two-Dimensional Materials
… using two-dimensional materials. Multi-Layer Graphene Nanoribbon (MLGNR) and Graphene are used as the channel and floating gate of the device proposed. The current in the channel is calculated using the Poisson-Schrodinger equation; the numerical algorithm is based on the Newton-Raphson (NR) …
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Transport properties of quantum dot molecules and electronic structure of graphene quantum dot qubits
… with high figure of merit are also illustrated. Graphene nanoribbon quantum dot qubits have been proposed as promising candidates for quantum computing applications to overcome the spin-decoherence problems associated with GaAs quantum dot qubits. We perform theoretical studies of the electronic …
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One- and Two-Dimensional sp2-Carbon Nanomaterials: Synthesis, Properties, and Applications
… sp2-carbon nanomaterials. The materials include graphene (2D), carbon nanotubes (1D), and graphene nanoribbons (pseudo-1D); and their hybrids with each other. Other classes of materials such as molecules, polymers, and inorganic nanoparticles are also interfaced with the carbon materials. This …
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Control of Nanoscale Thermal Transport for Thermoelectric Energy Conversion and Thermal Rectification
… design of a thermal AND gate using asymmetric graphene nanoribbon (GNR) and characterizes its performance.
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The Electrical Transport Study Of Graphene Nanoribbons And 2d Materials Beyond Graphene
… measurements on a suspended ultra-low-disorder graphene nanoribbon (GNR) with nearly atomically smooth edges that reveal a high mobility exceeding 3000 cm2 V-1 s-1 and an intrinsic bandgap was reported in this study. The experimentally derived bandgap is in quantitative agreement with the …
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Multiple-valued logic: technology and circuit implementation
… very promising emerging technologies are used: Graphene Nanoribbon Field Effect Transistor (GNRFET) and Carbon Nano Tube Field Effect Transistor (CNTFET). A comparative analysis of the proposed designs and several state-of-the-art designs are also given in all the cases in terms of delay, total …
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Graphene under strain. A combined continuum-atomistic approach
… we provide a picture of the elastic behavior of graphene, which was addressed as a two-dimensional crystal membrane. Thus, the constitutive nonlinear stress-strain relations for graphene, as well as its hydrogenated conformers, have been derived in the framework of the two-dimensional elastic …
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Inelastic transport In molecular junctions from first principles
… transport properties of carbon nanotube-zigzag graphene nanoribbon junctions, as realized in recent experiments, focusing on the local current distribution over the junctions. We calculate the local distribution of the elastic current to visualize the current injection pattern from the CNT …
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