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 35 for “"CVD graphene"”.
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Nanoscale studies of CVD graphene and poly(3-hexylthiophene) thin films.
… The materials used in this work are monolayer graphene grown by chemical vapor deposition (CVD) and poly(3-hexylthiophene) (P3HT) thin films, which have great potential for use in transparent solar cells. This work outlines my findings in understanding and characterizing different substrate …
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Application of CVD graphene in organic photovoltaics as transparent conducting electrodes
Graphene, a hexagonal arrangement of carbon atoms forming a one-atom thick planar sheet, has gained much attention due to its remarkable physical properties. Apart from the micromechanical cleavage of highly ordered pyrolytic graphite (HOPG), several alternate methods have been explored to achieve …
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Investigating electron transport in chemical vapor deposition graphene nanostructures
… properties in chemical vapor deposition (CVD) graphene-related nanostructures. There are many potential electronic and optoelectronic applications envisioned for graphene, due to its two-dimensional character and exceptional properties. However, the lack of scalability of exfoliated …
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Elastic properties of Carbon nanomembranes and graphene: theory and experiment
The Young's modulus and 2D modulus of CVD graphene and different kinds of CNMs was investigated by the Bulge Test and AFM nanoindentation. A detailed theoretical description of Bulge Test and nanoindentation is given and the accuracy of the mathematical models is estimated.
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Graphene for radio frequency electronics and infrared thermal imaging
… to 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 …
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Graphene as transparent electrodes for solar cells
… in applying chemical vapor deposition (CVD) graphene as the transparent conductor in photovoltaic devices. Transparent conducting oxides currently dominate the transparent conductor market but suffer drawbacks that make them unsuitable certain applications. Graphene is mechanically …
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Dry-transfer of chemical vapour deposited nanocarbon thin films
… the development of chemical vapour deposited (CVD) graphene and multi-walled carbon nanotubes (MWCNTs) as enabling technologies for flexible transparent conductors offering enhanced functionality. The technologies developed could be employed as thin film field emission sources, optical sensors …
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Novel Growth of Chemical Vapor Deposited Graphene on Molten Tin Metal
Since the discovery of two-dimensional (2D) graphene in 2004, it has attracted increasing research interest around the globe due to its remarkable properties and numerous applications. Chemical vapor deposition (CVD) has been widely used to grow graphene owing to its scalability, controllability, …
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Large-scale growth, fluorination, clean transfer, and layering of graphene and related nanomaterials
… (i.e., fluorination), and transfer of graphene and hexagonal boron nitride (h-BN). Further, this document explores new avenues in the large-area, heterogeneous layering of graphene, h-BN, and related nanomaterials like nanoscale water and biomolecules. It is determined that monolayer, …
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Heterogeneous integration of graphene and Si CMOS for gas sensing applications
… are highly sought-after. Discovery of graphene and its succeeding progress in nanotechnology has paved the way to design ultra-sensitive gas sensors that can detect individual gas molecules while operating at room temperature. Graphene is a promising candidate for gas sensing …
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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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Reliability, power dissipation, sensing, and thermal transport in carbon nanomaterials and devices
… nanotubes and 2-dimensional crystals (e.g. graphene), have presented new opportunities to improve energy use at the macro and nanoscale. However, much work remains to be done to fully understand the high-field reliability and fundamental properties of these nanomaterials in order to promote …
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Hybrid materials for flexible, transparent electrodes
… of metal meshes and Chemical Vapour Deposited graphene hybrid for flexible, transparent heaters. The transfer of graphene – a key step in the fabrication of the hybrid- was first optimised with a Failure Modes and Effects Analysis method to ensure a graphene layer free from mechanical defects …
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Large-Scale Graphene Film Deposition for Monolithic Device Fabrication
… a new platform material to replace Si.</p> <p>Graphene is considered a promising material with enormous potential applications in many electronic and optoelectronics devices due to its superior properties.</p> <p>There are several techniques to produce graphene films. Among these techniques, …
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Development of graphene growth surfaces for III-V semiconductors
… epitaxial film. For example, 2D material such as graphene coated on GaAs substrates allows the registry information of the underlying substrate to permeate through the graphene and facilitate the formation of exact copy of single crystal growth template. Therefore, the grown layer would replicate …
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Design and fabrication of the microcantilever heater for rapid chemical vapor deposition graphene synthesis
… heater for rapid chemical vapor deposition (CVD) graphene synthesis. Two types of 300 nm thick catalytic metals, copper and nickel, are integrated into the heater region ranging from 5 by 5 μm to 20 by 12 μm in size. The microcantilever heater is thermally actuated by Joule heating. The …
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Large scale applications of 2D materials for sensing and energy harvesting
… and characterization of printed reduced graphene oxide strain sensors, Chemical Vapor Deposition (CVD) 2D material transistors, and tungsten diselenide (WSe₂) photovoltaic devices that were produced through a combination of printing and conventional microfabrication processes. Each of …
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Microwave Spectroscopy and Transport Measurements of Andreev Bound States in Superconductor – Semiconductor Josephson Junctions
… more transparent superconducting contacts to CVD graphene for graphene Josephson junctions however switching to an epitaxial Al / InAs 2DEG material bypasses the contact transparency issue. Signatures of transport mediated by Andreev bound states in the few mode regime are observed in quantum …
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Middle infrared beam-steering using liquid crystals for spatial light modulation
… Material and design challenges are addressed. CVD graphene is found to be an appropriate transparent conductor, with a sheet resistance $ < 1 $k$ \Omega / \square $ and an optical transmission $ > 97 \% $ in the frequency band of interest. Liquid crystal BL-037 was found to have a birefringence …
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