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 38 for “"low-dimensional materials"”.
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Superconducting tunneling spectroscopy of low-dimensional materials
… on the orders of ones or tens of nanometers. Low-dimensional materials are of great interest due to the emergence of quantum effects and increased interactions between electrons, which can be exploited to create novel electronic devices. In this thesis, transport was studied in a variety of …
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Quantum Monte Carlo study of low dimensional materials
… thesis addresses several challenging problems in low-dimensional systems, which have rarely or never been studied using quantum Monte Carlo methods. It begins with an investigation into weak van der Waals-like interactions in bilayer graphene and extends to graphene placed on top of boron nitride …
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Strong-field Phenomena in Low-dimensional Materials at Terahertz Frequencies
… physics. Meantime, the development of low-dimensional materials with a reduction in at least one dimension has been shown to reveal novel properties beyond those encountered in bulk forms, including the emergence of multi-phase landscapes, collective quantum effects, and topological …
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Terahertz Time-Domain Spectroscopy of Low-Dimensional Materials and Photonic Structures
… spectroscopy to characterize polymeric materials and nano-composites. We demonstrate the design and fabrication of THz mirrors based on one-dimensional photonic crystals consisting thermoplastic polymers and BaTiO3 nanoparticles. Stop bands have been achieved in the THz region, and the …
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Competing polar and nonpolar distortions and phase transitions in low-dimensional materials
… of different phases and phase transitions in low-dimensional systems is essential for the understanding and control of nanoscale devices. Theoretical models aided by first-principles calculations have proven invaluable in this respect. However, observed behaviour often differs from what is …
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Computational Study of Carbon-Based Low-Dimensional Materials on Structures, Properties and Applications
Low-dimensional materials including both 1D and 2D scenarios exhibit unique properties distinguished from their bulk states. In this thesis, computational modeling of low-dimensional materials on their structures, properties and applications has been investigated. First-principles simulations are …
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LASER SHOCK IMPRINTING OF METALLIC NANOSTRUCTURES AND SHOCK PROCESSING OF LOW-DIMENSIONAL MATERIALS
… plasmonic nanostructures, and processing of one-dimensional semiconductor nanowires and two-dimensional crystals. The technique utilizes a shock pressure generated by laser ablation of sacrificial materials. Compared with conventional technologies, LSI features ambient condition, good …
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Strain responsive systems based on deformed low dimensional materials for sensing and actuation
Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2022-12-01
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Synthesis of 1T-Tantalum (IV) Sulfide and observation of charge density wave using scanning tunneling microscopy
… progress have been made in the study of low-dimensional materials. These low-dimensional materials not only help reduce transistor footprint and improve power and performance metrics, they also exhibit very peculiar electrical properties. A particular example is the existence of a charge …
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Thermoelectric characterization of one- and two- dimensional materials
Thermoelectric materials are useful for a wide range of applications like waste heat removal, solid state cooling, and power generation in space missions etc. A material's thermoelectric figure of merit (zT), which determines its performance in the applications listed above, depends on its Seebeck …
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Colloidal Electronics
… Carbon nanotubes (1D), graphene (2D) and other low-dimensional materials with well-defined lattice structures can be incorporated into polymer microparticles, granting them unique electronic functions. The resulting colloidal electronic 'cells', comprised of microscopic circuits connecting …
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Superconducting tunneling spectroscopy of graphene and graphene nanostructures
… 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 magnetic field/low temperature …
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Development of Solution-Processed Stable Silver Nanowire Networks for Transparent Electrodes
… severe challenges, including the scarcity of raw materials, high cost of processing, and lack of mechanical flexibility. Emerging transparent electrodes composed of solution-synthesized silver nanowire (AgNW) networks are highly appealing alternatives, but their poor stability prevents market …
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Study of Thermoelectric and Lattice Dynamics Properties of 2D Layered MX (M = Sn, Pb; X = S, Se, Te) and ZrS2 Compounds using First-principles Approach
… and lattice dynamics properties of two-dimensional (2D) MX (M = Sn, Pb; X = S, Se, Te) and ZrS2 compounds based on the first-principles density functional theory. The dimensionality reduction (e.g., using 2D structure) of bulk materials is found to have enhanced thermoelectric …
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Low-dimensional carbon nanotube and graphene devices
… (1991) and graphene (2004) are intrinsically low-dimensional materials with remarkable electronic properties. Combined with semiconductor technologies they might be used to fabricate smaller devices with more complex functionality. This thesis addresses two routes towards this goal. The …
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Raman spectroscopy of metallic carbon nanotubes
Metallic carbon nanotubes are one dimensional conductors that are both technologically promising for electronic applications, and scientifically interesting for studying the physics of low dimensional materials. In this thesis, we present a detailed study of the inelastic light scattering (Raman) …
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Low-Energy Electron-Photon Interactions in a Scanning Electron Microscope
… interactions. In this thesis, we construct a low-energy, ultrafast scanning electron microscope, using it to explore quantum coherent interactions between electrons, light, and matter. In Chapter 1, we review the history of free electron experiments and how advances in nanofabrication, …
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Hafnium Metal-Organic Frameworks: Formation Routes and Defect Engineering
… of MOFs with the considerable potential of low-dimensional materials like nanosheets or nanowires gives a wide range of functionalities for real-world applications. The deliberate introduction of defects into a MOF, or ‘defect engineering’, is a particularly significant method of modifying …
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