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 57 for “"Two-Dimensional (2D) Materials"”.
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Design, Fabrication, and Characterization of Metals Reinforced with Two-Dimensional (2D) Materials
… many decades. A promising option for making such materials are Metal matrix composites (MMCs). MMCs contain dispersions of reinforcement in the form of fibers, particles, or platelets that significantly improve their thermal, electrical, or mechanical performance. This dissertation focuses on …
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Polarity governs atomic interaction through two-dimensional materials
Transparency of two-dimensional (2D) materials to inter-molecular interactions has been an unresolved problem. Previous researchers found that water droplets interact with underlying substrates through graphene, as if the graphene is "transparent". However, graphene's transparency determined by …
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Atomistic modeling and simulations of 2D materials : chemical vapor deposition, nanoporous defects, force-field development, wetting, and friction
Two-dimensional (2D) materials, such as, graphene, transition metal dichalcogenides (TMDs) (e.g., molybdenum disulfide (MoS₂)), and hexagonal boron nitride (hBN), have recently received considerable attention, due to their layer-number-dependent optoelectronic, mechanical, and barrier properties. …
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Multiscale modeling of two-dimensional materials : structures, properties, and designs
… should be validated against the experiments. Two-dimensional (2D) materials provide excellent platforms to verify theoretical models by directly comparing atomic structures and properties with advanced transmission electron microscopy (TEM) techniques due to their high crystallinity and thin …
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Infrared detectors based on two-dimensional materials and heterostructures
… functionality and energy efficiency. Two-dimensional (2D) materials, a family of nanomaterials with atomic thickness, promise an ideal platform for nanoscience and nanotechnology research on which we are able to engineer functional structures and study their properties at the limit of …
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System-Technology Co-Optimization of Scaled Electronics Based on Two-Dimensional Materials
… This thesis addresses these issues with two-dimensional (2D) materials, which includes inventing a low-temperature (< 300 °C) metal-organic chemical vapor deposition (MOCVD) method for 2D materials on 8-inch wafers, investigating extreme device scaling and multi-channel transistors. …
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DIMENSIONALITY REDUCTION OF 2D MATERIALS: NANODEVICES AND IN-SITU NANOMECHANICAL ANALYSIS
Two-dimensional (2D) materials are inherently soft and can undergo morphological changes, such as from nanosheets to one-dimensional (1D) nanoscrolls at certain conditions. This thesis is focused on the investigation of nanoscrolls formed at different circumstances: (i) by means of chemical …
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THERMAL AND THERMOELECTRIC PROPERTIES OF TWO-DIMENSIONAL HETEROSTRUCTURES
… the (re-)discovery of graphene, atomically thin two-dimensional (2D) materials have progressed rapidly due to their interesting physics and potential applications. Van der Waals heterostructures with one 2D material stacked on another, are being established for devices with new functionalities …
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OPTICAL PROPERTIES OF 2D TRANSITION METAL DICHALCOGENIDES ENHANCED BY PLASMONIC NANOSTRUCTURES
As a typical two dimensional (2D) materials system, transition metal dichalcogenides (TMDCs) such as tungsten diselenide (WSe2) and molybdenum disulfide (MoS2) have impressive properties arising from the atomically-thin nature and have been demonstrated to be potentially useful building blocks for …
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2D material devices for low power logic and memory applications
… ferroelectric memory devices (task 2) based on two-dimensional (2D) materials. In the first task, electrical characteristics of mechanically exfoliated n-type Molybdenum Disulfide (MoS2 ) and a new p-type material Germanium Selenide (GeSe) were investigated. The pn junctions based on GeSe/MoS2 …
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Photocurrent Spectroscopy Study of Graphene / Hexagonal Boron Nitride Moiré Superlattice In the Far-Infrared Regime
Two-dimensional (2D) materials and their heterostructures, especially those with moiré superlattices, have been one of the most fascinating topics in physics in recent years. Many interesting physics, for example the correlated insulating state at half- or quarter- fillings of the moiré band, …
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Design-technology Co-optimization for Sub-2 nm Technology Node Based on 2D Materials
… complexity of advanced semiconductor processes, two-dimensional (2D) materials offer promising opportunities when developed through Design-Technology Co-Optimization (DTCO). This thesis presents a comprehensive study of DTCO with a novel framework tailored for 2D material-based electronics that …
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Large-scale density functional theory study of van-der-Waals heterostructures
Research on two-dimensional (2D) materials currently occupies a sizeable fraction of the materials science community, which has led to the development of a comprehensive body of knowledge on such layered structures. However, the goal of this thesis is to deepen the understanding of the …
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The Synthesis and Fabrication of Two-Dimensional Polymers
… has been a proverbial gold rush in the field of two-dimensional (2D) materials because their unique properties promise numerous applications. The synthesis of 2D materials is currently a hot field with many branches, one of them being synthetic two-dimensional polymers (2DPs). 2DPs share many …
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Characterization of nanostructured hexagonal boron nitride patterned via high-resolution ion beam lithography
The forefront of polariton research in two-dimensional (2D) materials focuses on pushing the limits of patterning 2D materials into nanoresonators and other nanophotonic structures that manipulate highly confined polaritons for technologically relevant near-IR and mid-IR applications. Furthermore, …
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MULTIFUNCTIONAL BEHAVIORS OF TWO-DIMENSIONAL MATERIALS AND THEIR COMPOSITES
<p>"Two-dimensional (2D) materials, including graphene, transition metal carbides or nitrides (TMC/Ns), have rich surface chemistry, superb electrical and mechanical properties. These unique properties make them ideal for multifunctional devices. Among them, we focused on graphene and TMC/Ns (i.e., …
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Hybrid Two Dimensional Quantum Devices
… on hybrid material systems involving two dimensional (2D) materials and phenomena along with the development of a small, hermetically sealed cell. The hermetic cell is designed to assist with analyzing sensitive 2D materials outside of an inert environment. When working with van der …
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LUMINESCENT 2D COORDINATION NETWORKS (CNS): STRUCTURAL AND EXFOLIATION STUDIES
… has increasingly focused on the investigation of two-dimensional (2D) materials, with the objective of integrating them into new technologies and devices while minimizing their environmental impact. Within the field of materials science, coordination polymers (CPs), crystalline, porous materials …
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Application of cellulosic materials as flexible substrates for two-dimensional electronic heterostructure devices
With the goal of creating a set of materials to enable flexible electronics, two-dimensional (2D) materials are incredibly capable. This family of nanomaterials comprises a suite of strong and flexible conducting, semiconducting, and dielectric materials. These materials, all compatible with one …
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Electronic device fabrication and characterization based on two-dimensional materials
Two-dimensional (2D) materials have attracted extensive attention due to their unique and remarkable properties, such as the atomically thin body, pristine surface free of dangling bonds, tunable bandgap, and reasonably high mobility, which make 2D materials promising candidates for novel …
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