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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 40 for “"transition metal dichalcogenide"”.
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Luminescent Harnessing of 2D Transition Metal Dichalcogenide Excitons
Two-dimensional (2D) semiconducting transition metal dichalcogenides (TMDs) are regarded as viable candidates for future high-performance optoelectronic and electronic devices due to their chemical stability, low dimensionality, direct bandgap and favourable electronic mobilities. Their direct …
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Controlling exciton dimensionality in novel transition-metal dichalcogenide platforms
… across different dimensionality. I focus on transition-metal dichalcogenides (TMD), few-atom thick, layered materials, which are direct-bandgap semiconductors in the monolayer limit. These materials host excitons, bound electron-hole pairs, with large binding energies due to their …
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Electrical contacts on two-dimensional transition metal dichalcogenide semiconductors
Two dimensional (2D) transitional metal dichalcogenides (TMDs) such as molybdenum disulfide (MoS2) have been demonstrated to be excellent semi-conductors for ultra-thin FETs. However, unusually high contact resistance and Fermi level pinning have been observed due to damage at the metal-2D TMD …
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Developing transition metal dichalcogenide alloys for applications to integrated photonics
We explore the potential of transition metal dichalcogenides (TMDs) as phase-change materials for photonics integrated circuits (PIC). We measure the near-infrared (NIR) optical properties of bulk crystal telluride TMDs and sulfide TMDs. We find that telluride TMDs have large optical density and …
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Optical investigation of many-body interactions in transition metal dichalcogenide heterostructures
Two-dimensional transition metal dichalcogenide (TMD) heterostructures have emerged as a novel platform for the investigation of many-body physical phenomena. In these systems, tightly bound excitons dressed by a gate-tunable Fermi sea form exciton-polarons, which are sensitive to Coulomb and spin …
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Development of Transition Metal Dichalcogenide Memristive Materials and Devices for Neuromorphic Systems
… of memory and computation in hardware. Transition metal dichalcogenides (TMDCs) are promising in this context, offering atomically thin scalability and resistive switching behavior that mimics synaptic functions. However, reproducible wafer-scale deposition and reliable integration into …
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Interfaces between two-dimensional transition metal dichalcogenide semiconductors and oxide dielectrics for transistors
… the interfaces between two-dimensional transition metal dichalcogenide (2D TMD) semiconductors and gate oxide dielectrics for field effect transistors (FETs). 2D TMDs, such as molybdenum disulfide (MoS₂), are promising for sub-10 nm channel FETs because they retain their exceptional …
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Synthesis and electrical property measurements of individual layered transition metal dichalcogenide nanotubes and nanowires
Nanotubes of the layered transition metal dichalcogenides (LTMDs) including MoS2, WS2, ReS2, and ReSe 2 have been synthesized. Additionally, nanowires of WS2 have been synthesized. All of the 1-dimensional structures synthesized used some form of a template to structurally direct 1-dimensional …
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Graphene nano-ribbon and transition metal dichalcogenide field-effect transistor modeling and circuit simulation
… and simulation study of graphene nano-ribbon and transition metal dichalcogenide field-effect transistors. Through compact modeling, SPICE implementation of the transistors is realized, and circuit-level simulation is enabled. Extensive simulation studies are performed to evaluate the performance …
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Elucidation of Charge Density Wave Stability and Defect Interactions in the Highly-Ordered Structural Transition Metal Dichalcogenide System 1T-TaS2
… CDW stability using high-resolution and in situ transition electron microscopy (TEM).Direct observation of the CDWs allows for characterizing the interaction between the superlattice and the underlying lattice, including topological defects. Various methods have been used to visualize the CDW …
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Scanning tunneling microscopy investigations of transition metal dichalcogenide 1t-tantalum disulfide and zigzag-shape graphene nanoribbons in ultra-high vacuum
… the studies of 1T-TaS2, a member of the transition metal dichalcogenides (TMDCs) family, and wet-chemically synthesized zigzag-shape graphene nanoribbons (GNRs) on hydrogen passivated silicon substrate through scanning tunneling microscopy (STM). Dry contact transfer allows unperturbed …
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Quantum Dots In Two-Dimensional Tungsten Diselenide
… and double quantum dots in two-dimensional transition metal dichalcogenide tungsten diselenide (WSe_2) as a means to evaluate the valley degree of freedom as a potential qubit and ambipolar tungsten diselenide monolayers as single photon sources. Gate-defined quantum dots in monolayer and …
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High performance MoS₂ transistors based on wafer-scale low-temperature MOCVD synthesis
… will demonstrate a novel 8-inch, BEOL-compatible metal organic chemical vapor deposition (MOCVD) method for the synthesis of 2D transition metal dichalcogenide materials with growth temperature lower than 400°C. Highly-scaled high-performance MoS₂ transistors will also be investigated with …
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Weak Shock Waves on a Chip: Generation and Applications
… by transiently modulating a monolayer of a transition metal dichalcogenide deposited on a substrate.
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Nanofluids with optimised thermal properties based on metal chalcogenides with different morphology
… drops. In this Doctoral Thesis, the use of transition metal dichalcogenide-based nanofluids as a heat transfer fluid in solar power plants has been investigated for the first time. Specifically, nanofluids based on one-dimensional, two-dimensional and three-dimensional MoS2 , WS2 and WSe2 …
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Plasmonic nanostructures and metamaterials for nanoscale light-matter interaction
… a plasmonic nanocavity and a monolayer of transition metal dichalcogenide is developed.
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Electrical, electronic and optical properties of MoS2 & WS2
… materials such as graphene, boron nitride and transition metal dichalcogenide (TMDCs) monolayers have arisen as a new class of materials with unique properties at monolayer thickness. Their electrical, electronic and optical properties are of great importance for a variety of applications in …
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Synthesis and Electronic Transport of Natural Superlattice Compounds
… study of natural superlattices composed of transition metal dichalcogenide (TMD) monolayers alternating with spacer layers. These superlattices belong to the TMD family with chemical formula MS₂, M = (V, Nb, Mo, W). We study one such compound, Sr-VS₂, through electronic transport …
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Synthesis of 1T-Tantalum (IV) Sulfide and observation of charge density wave using scanning tunneling microscopy
… (IV) Sulfide (1T-TaS2). A member of the transition metal dichalcogenide (TMDC) family, 1T-TaS2 exhibit a periodic modulation of electronic charge density. Unlike bulk semiconductor or metals, lattice distortion in this low-dimensional material creates non-uniform, wave-like electron …
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