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 1074 for “"graphene"”.
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Superconducting tunneling spectroscopy of graphene and graphene nanostructures
… with superconducting tunneling spectroscopy of graphene and nanostructures in two dimensional materials. The technique of tunneling spectroscopy via a planar superconducting probe is developed based on a well-formed self-limited tunnel barrier created only between the Pb and the graphene. High …
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Synthesis and Characterization of Pillared Graphene and Holey Graphene
Pillared graphene (pG) and holey graphene (hG) are derivatives of graphene designed to overcome issues with agglomeration and restacking between graphene sheets, which limit surface area and ion diffusion. These two types of graphenes have enhanced catalytic properties due to holes and pillars …
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Processing and characterization of graphene and graphene on silicon
Graphene has become a promising material for applications in many areas including electronic devices, batteries and space crafts. Although it has a bright future, the commercial production of graphene has not yet been realized. In this thesis, an overview of the properties and applications of …
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Thermal properties of graphene and graphene-based thermal diodes
… of manipulating and controlling heat fluxes, graphene represents a promising material revealing an unusually high thermal conductivity �. However, both experimental and theoretical previous works lack of a strict thermal conductivity value, estimating results in the range 89-5000 W m-1 K-1. In …
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Photon-induced tunneling in graphene-boron nitride-graphene heterostructures
Graphene is a material that has generated much interest due to its many unique electronic and optical properties. In this work, we present optoelectronic measurements performed on ultrathin graphene-boron nitride-graphene heterostructures. Scanning photocurrent spectroscopy allows us to explore the …
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Multiscale Mechanics of Graphene Oxide and Graphene Based Composite Films
The mechanical behavior of graphene oxide is length scale dependent: orders of magnitude different between the bulk forms and monolayer counterparts. Understanding the underlying mechanisms plays a significant role in their versatile application. A systematic multiscale mechanical study from …
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Graphene at interfaces
… interactions between extended π-systems of graphene in various graphites have been studied for several decades. However, to date, no effective scalable exfoliation mechanism has been reported to exclusively synthesize dispersible single layer graphene in liquid environments. The first …
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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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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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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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CVD synthesis of graphene
The research into the subject of graphene has soared over the past few years. Due to the exceptional nature of some of its properties, it has become ever popular in the field of nanotechnology. The use of graphene for various electronics applications have been displayed using graphene that can be …
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Noncovalent Functionalization Of Graphene
Graphene is a newly available conductive material ideally suited for forming well-defined interfaces with electroactive compounds. Aromatic moieties typically interact with the graphene surface to maximize Van der Waals interactions, predisposing most compounds to lie flat on its basal plane. A …
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Liquid foams of graphene
… these foams, air bubbles are encapsulated inside graphene shells. The shells have a concentric layered structure made of isophorone diamine modified graphene oxide sheets. The liquid foams of graphene were initially developed as an extractive step in the preparation of graphene-epoxy …
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Developing force field parameters for water interacting with graphene and graphene-like materials
… seawater desalination. The explosive studies on graphene have sparked new interests towards graphene-analogous materials including hexagonal boron nitride (hBN) and molybdenum disulfide (MoS2). Compared to graphene, the graphene-analogous materials possess non-zero bandgap, chemical inertness, …
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PVDF-graphene conductive composite membrane and PVA-graphene conductive composite membrane preparation and application
Graphene has a great potential to revolutionize many fields because of its perfect electrical conductivity. Therefore, it is considered a possible material for the preparation of conductive membrane. In this research, polyvinylidene fluoride (PVDF) and polyvinyl alcohol (PVA) were used together …
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Graphene-assisted spontaneous relaxation and direct CVD growth of graphene on III-V substrate
… We have observed that heteroepitaxy on graphene-coated substrates allows for spontaneous relaxation of misfit strain owing to the slippery graphene surface while achieving single-crystalline films by reading the atomic potential from the substrate. This spontaneous relaxation technique …
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Graphene-Assisted gan membranes formation /
… of this study was to exfoliate GaN layers from graphene, which would serve as a platform for the formation of flexible membranes composed of group III nitrides.
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Experiments in Graphene and Plasmonics
Graphene nanoribbons, graphene based optical sensors, and grating based plasmonics are explored experimentally. Graphene nanoribbons exhibit highly insulating states that may allow for graphene based digital applications. We investigate the sensitivity of these states to local charged impurities in …
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Electronic transport of graphene devices
… mainly investigations of electronic transport of graphene devices. First of all, the surface property of graphene has been studied in order to make better contacts between graphene and metal. Electrical properties of graphene are investigated. Reproducible current hysteresis is observed when high …
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