In this thesis electron transport in disordered, substrate supported graphene and suspended ultraclean graphene is studied. We investigate graphene lying on top of silicon oxide and contacted with superconducting aluminium electrodes. The conductions fluctuations CF are studied in single layer graphene devices. The CF are found to be enhanced by superconductivity by a factor of 1.
Alsalman, Hussain Abstract Graphene is a leading two dimensional 2D material with good technological potential. Currently, it is being scaled up in synthesis methods in order to meet future demands in technology markets.
In this dissertation, a study of transferred epitaxial graphene TEG as a synthesis method, for large area monolayer and AB stacked bilayer Graphene, is presented.
Monolayer epitaxial graphene EG is grown on the face of silicon carbide SiC in an argon atmosphere at a temperature of o C. Either form of graphene can subsequently be transferred off the SiC substrate to mitigate the negative effects of the substrate.
We develop a transfer process based on a gold adhesion layer and demonstrate for the first time, the transfer of high quality monolayer transferred epitaxial graphene MTEG and AB stacked bilayer transferred epitaxial graphene BTEG.
We use Raman characterization methods to determine the number and quality of graphene layers as well as orientation for bilayers which was made possible by contrast enhancement upon substrate transfer.
We report these characteristics for the first time. Extensive structural characterization that have never been done before and were made possible by the successful transfer procedure, are presented in the Transmission Electron Microscopy TEM section.
This is over two times gain in mobility before transfer and is competitive with current leading synthesis methods.
To the knowledge of the author, there are no reports in literature on the measured mobility of BTEG.
A section in this dissertation will be dedicated to related work on chemical vapor deposition CVD hexagonal boron nitride h-BN which is a complimentary 2D material to graphene. Improvements on CVD growth by electropolishing the copper substrate will be demonstrated where root mean square RMS surface roughness of starting material is reduced from nm to 12 nm, considerably improving subsequent h-BN CVD growth.structural and electronic properties of hydrogenated graphene a thesis submitted to the faculty of clark atlanta university in partial fulfillment of the requirements for.
Nanoelectromechanical systems like ultra-sensitive force sensors based on bilayer graphene Each of these topics has been studied in one or more published articles. Abstracts and links to the full text can be found in the searchable QuantumATK publication list.
Multi-wavelength Raman characterization of back-gated monolayer and bilayer graphene Thesis submitted to the Halmstad University, Sweden For the degree of Masters of Science.
Theory of Bilayer Graphene Spectroscopy (Springer Theses) - Kindle edition by Marcin Mucha-Kruczy?ski.
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Ground State of Disordered Graphene Heterostructures A thesis submitted in partial fulfillment of the requirements for the degree of Bachelor.
the effect of different pseudopotentials on the band structure of bilayer graphene will also be briefly discussed. ii ACKNOWLEDGMENTS I would like to express my gratitude to my guide and mentor, Dr. David Ferry, who continues to field helped me gather the knowledge I needed to complete this Thesis.