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 29 for “"graphene devices"”.
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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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Surface functionalization of graphene devices
Graphene, a zero-gap semiconductor with massless charge carriers, is emerging as an amazing material for future electronics, due to its outstanding electrical and mechanical performances. However, the lack of a bandgap results in a high off-state current leakage and a nonsaturating drive current, …
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Low-dimensional carbon nanotube and graphene devices
Electronic devices in which the electrons are confined to fewer than three spatial dimensions are an important tool for physics research and future developments in computing technology. Recently discovered carbon nanotubes (1991) and graphene (2004) are intrinsically low-dimensional materials with …
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Studies of bilayer and trilayer graphene
Graphene is a single 2-dimensional atomic layer of hexagonally packed carbon atoms. Graphene has a unique combination of thermal, mechanical, and electronic properties, making it a useful tool for learning new physics as well as a material with high potential for applications. Bilayer graphene …
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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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A Study of Infrared Femtosecond Laser Irradiation on Monolayer Graphene on SiO2/Si Substrate
Graphene is a single hexagonal atomic carbon layer. Since its discovery, graphene is emerging as an exciting and promising new material to impact various areas of fundamental research and technology. It has potentially useful electrical properties for device applications such as graphene …
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The Edge States of Epitaxial Graphene on SiC
… transport was observed in sidewall epitaxial graphene nanoribbons on SiC (SWGNRs) at room temperature. These objects are of fundamental interest as they provide a direct access to charge neutral graphene with excellent transport properties. In this thesis, beyond sidewalls, we fabricate …
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Topological descriptions of grain boundaries in graphene
Since 2004, when monolayer graphene was first experimentally isolated, proof-of-concept graphene devices have added new functionality to engineering devices. As these devices become geared toward commercial applications, the development of high-throughput manufacturing methods that produce …
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Advances in the CVD growth of graphene for electronics applications
Graphene, a monoatomic sheet of graphite, has recently received significant attention because of its potential impact in a wide variety of research areas. This thesis presents progress on improving the quality of graphene for electronics applications. An analysis tool was developed that provides a …
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Graphene for radio frequency electronics and infrared thermal imaging
… develop a reliable processing technology for CVD graphene devices for applications in graphene circuits, i.e. mixers, frequency multipliers and phase key shifters. The performance of current graphene circuits has been limited to below 1.5 GHz due to issues with contact resistances and materials …
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Graphene characterization and device fabrication: doping analysis, strains engineering towards terahertz radiation
… of the most promising two-dimensional materials, graphene’s outstanding electrical, mechanical and optical properties have made many new devices possible. Its ultra-thin thickness makes both the fabrication and characterization of graphene-based device challenging. In my thesis, I will discuss …
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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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Mechanics driven architectures for flexible nanomaterial-based sensors
… presents a polymer-free approach to patterning graphene using a stencil mask and oxygen plasma reactive-ion etching, with a subsequent polymer-free direct transfer for flexible graphene devices. In conjunction with the recent evolution of additive and subtractive manufacturing, I adopt …
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Quantum transport in graphene heterostructures
… dimensional charge carriers in mono- and bilayer graphene are described by massless and massive chiral Dirac Hamiltonians, respectively. This thesis describes low temperature transport experiments designed to probe the consequences of this basic fact. The first part concerns the effect of the …
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Fabrication and electrical characterization of transistors made from carbon nanotubes and graphene
Carbon nanotubes and graphene are low-dimensional allotropes of carbon which exhibit novel mechanical and electrical properties. The methods for producing these materials and fabricating electronic devices from them are still under development. This thesis uses the fabrication and electronic …
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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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Carrier manipulation in graphene/ferroelectric hybrid structures
… as well as for utilization in future electronic devices. This thesis reports significant advancement in the integration of two prominent representatives of these material classes - graphene and ferroelectric oxides. First, the major road blocks complicating previous attempts to integrate graphene …
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Graphene, layered materials and hybrid structures for advanced photodetectors
… for high-mobility, chemical-vapour-deposited graphene devices which could help to increase the responsivity in graphene-based photodetectors. I then show three examples of graphene-based Schottky photodetectors working at the telecommunication wavelength $\lambda$=1550nm, two for free-space …
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Synthesis and characterization of graphene: a raman study of the effect of electromagnetic and proton irradiations on graphene
Graphene, a single atomic layer of hexagonally arranged sp2–hybridized carbon atoms, with a thickness of only 0.34 nm, exhibits unique properties. The current interest in graphene can be attributed to three main reasons. Firstly, various forms of graphite, nanotubes, buckyballs and others can all …
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Carrier Transport and Electrical Conduction in Alloy-Mediated Graphene on Silicon
The possibility of graphene-based micro- and nanoelectronic devices that exploit the extraordinary electronic properties of graphene is the biggest inspiration behind the accelerated development of graphene science and technology. Although the remarkable efforts for establishing graphene as a new …
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