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Showing 1 to 20 of 54 for “"dichalcogenide"”.
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Synthesis and Reactivity of Dichalcogenide and Substituted Dichalcogenide Ligands in Molecular and Nonmolecular Compounds
An array of mono- and 1,2-disubstituted derivatives of the (eta)('2)-S(,2) and Se(,2) ligand systems have been prepared. The reactivity and distinctive ('1)H NMR spectroscopic behavior of complexes containing these ligands have been examined. The reactivity studies were extended to solid-state …
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Luminescent Harnessing of 2D Transition Metal Dichalcogenide Excitons
… (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 bandgap …
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Controlling exciton dimensionality in novel transition-metal dichalcogenide platforms
… 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 two-dimensional nature. …
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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
… 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 memristive …
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The Nature of Active Sites in Catalytic Zeolites and Metal Dichalcogenide Inclusion Complexes
Made available in DSpace on 2014-12-13T20:10:50Z (GMT). No. of bitstreams: 1 8009187.pdf: 3477349 bytes, checksum: 890e0d717cec6a9569e3ac1d3407276c (MD5) Previous issue date: 1979
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Interfaces between two-dimensional transition metal dichalcogenide semiconductors and oxide dielectrics for transistors
… 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 electronic properties …
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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
… 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 of these two …
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Elucidation of Charge Density Wave Stability and Defect Interactions in the Highly-Ordered Structural Transition Metal Dichalcogenide System 1T-TaS2
The 1T phase of tantalum disulfide (1T-TaS2) has a rich and complex charge density wave (CDW) phase character that has been broadly studied. CDWs are a highly correlated state between electron density and lattice distortion, originally predicted to only exist in one dimension. The discovery of CDWs …
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Scanning tunneling microscopy investigations of transition metal dichalcogenide 1t-tantalum disulfide and zigzag-shape graphene nanoribbons in ultra-high vacuum
… 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 transfer and …
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Magnetic Penetration Depth Analysis of Unconventional Superconductors
… different dopants, Sn and Cd, and the layered dichalcogenide TiSe2 doped with copper. We seek to study the impact of antiferromagnetism and the presence of a quantum critical point on superconductivity. We also seek to characterize the superconductivity and compare to similar materials. …
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X-Ray Absorption in Layered Crystals
… for a group of layered transitional-metal dichalcogenide crystals, including the nonstoichiometric compounds Ti(,1+x)Se(,2) and the alloys Zr(,x)Ti(,1-x)Se(,2). Fourier transform analysis of the EXAFS spectra has been performed in order to test the theoretical phase and amplitude functions …
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Quantum Dots In Two-Dimensional Tungsten Diselenide
… 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 bilayer WSe_2 were …
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High performance MoS₂ transistors based on wafer-scale low-temperature MOCVD synthesis
… 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 different contact engineering methods. These findings represent crucial steps for high performance …
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Weak Shock Waves on a Chip: Generation and Applications
… 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
… 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 nanostructures have …
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