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 14 of 14 for “"suspended graphene"”.
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Towards the fabrication of suspended superconductor-graphene-superconductor Josephson junctions
Graphene, a newly discovered material. has been the subject of much experimental and theoretical study due to its unique electronic behavior. In this thesis, I present, my work with graduate student Joel Wang to design and fabricate Josephson junctions on high quality graphene samples. Using …
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Electronic transport in atomically thin layered materials
… since the discovery of isolated single layer graphene in 2004. Graphene, a semi-metal, has a unique gapless Dirac-like band structure at low electronic energies, giving rise to novel physical phenomena and applications based on them. Graphene is also light, strong, transparent, highly …
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Discrete Strain Engineering in Graphene
<p>Graphene has a number of fascinating mechanical and electrical properties. Strain engineering in graphene is the attempt to control its properties with mechanical strain. Previous research in this area has come up with an approach using a continuum theory to describe the strain induced gauge …
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GRAPHENE NANOSTUCTURING WITH THE HELIUM ION MICROSCOPE
NANO-ENGINEERING OF GRAPHENE HAS ATTRACTED TREMENDOUS INTEREST FOR GRAPHENE?S POTENTIAL APPLICATIONS. HOWEVER, THE CONVENTIONAL FABRICATION TECHNIQUES, ARE EITHER LIMITED BY THE LITHOGRAPHIC RESOLUTION OR LIMITED TO FIXED GEOMETRIES. OUR GROUP HAS DEMONSTRATED A RESIST-FREE DIRECT PATTERNING METHOD …
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High-field transport in two-dimensional graphene and molybdenum disulfide
… two-dimensional (2D) crystals such as graphene and molybdenum disulfide (MoS2). The excellent electrical and thermal properties of 2D materials like graphene have attracted much attention for potential applications in integrated-circuit technology. Understanding high-field transport in …
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Investigations of the Band Structure and Morphology of Nanostructured Surfaces
… systems: valence band electrons in single layer graphene and electronic states created at the vacuum interface of single crystal copper surfaces. The characteristics of both electronic systems depend intimately on the morphology of the surfaces they inhabit. Thus, in addition to discussing the …
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Manipulating graphene's lattice to create pseudovector potentials, discover anomalous friction, and measure strain dependent thermal conductivity
Graphene is a single atomic sheet of graphite that exhibits a diverse range of unique properties. The electrons in intrinsic graphene behave like relativistic Dirac fermions; graphene has a record high Young's modulus but extremely low bending rigidity; and suspended graphene exhibits very high …
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Stochastic Models of Surface Limited Electronic and Heat Transport in Metal and Semiconductor Contacts, Wires, and Sheets---Micro to Nano
… extended to such 2D semiconductor materials as graphene, where low thermal conductivity is approximated below 1000 W/m/K for rough suspended graphene ribbons in accordance with recent experiments.
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Stochastic Models of Surface Limited Electronic and Heat Transport in Metal and Semiconductor Contacts, Wires, and Sheets — Micro to Nano
… extended to such 2D semiconductor materials as graphene, where low thermal conductivity is approximated below 1000 W/m/K for rough suspended graphene ribbons in accordance with recent experiments.
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The Electrical Transport Study Of Graphene Nanoribbons And 2d Materials Beyond Graphene
<p>The electrical transport 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 …
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Atomic structures of carbon nanomaterials studied by coherent electron diffraction
… The allotropes of carbon nanoforms, including graphene, carbon nanotube (CNT), fullerene and nanodiamond, have opened up many opportunities in nanotechnology, and their importance has been highlighted with two Nobel Prizes awarded to fullerene in 1996 and graphene in 2010. However, structural …
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Quantum Hall transport in graphene and its bilayer
Graphene has generated great interest in the scientific community since its discovery because of the unique chiral nature of its carrier dynamics. In monolayer graphene, the relativistic Dirac spectrum for the carriers results in an unconventional integer quantum Hall effect, with a peculiar Landau …
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First principles quantum Monte Carlo study of correlated electronic systems
… dioxide) and low dimensional electronic systems (graphene and graphene-like two dimensional systems). Vanadium dioxide (VO2) is a paradigmatic example of a strongly correlated system that undergoes a metal-insulator transition at a structural phase transition. To date, this transition has …
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Multi-scale mechanics of monolayer graphene membranes : elasticity, fracture, and mechanochemistry
Graphene, owing to its remarkable material properties, is considered as an ideal material for a broad range of nano-scale applications. The performance of any graphene-based device would depend upon the material's response to deformation and its intrinsic resistance to failure. Nano-indentation is …