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 24 for “"TMDCs"”.
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OPTICAL PROPERTIES OF 2D TRANSITION METAL DICHALCOGENIDES ENHANCED BY PLASMONIC NANOSTRUCTURES
… 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 optoelectronic integrated circuits. …
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Field-effect transistors on monolayer transition metal dichalcogenides synthesized by chemical vapor deposition
… 2DMs, known as transition metal dichalcogenides (TMDCs), are particularly useful as channel material in transistor devices due to their often-semiconducting properties. However, among the various challenges associated with applying TMDCs to conventional electronic devices, the most important by …
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INTERFACE ENGINEERING OF 2D MATERIAL NANODEVICES
… transition metal dichalcogenides (TMDCs) based field effect transistors (FET) have been successfully achieved at room temperature, with two order of magnitude improvement in field effect mobility. An enhanced spin relaxation has been observed at low temperature in crested MoS2 based …
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Synthesis and characterization of two-dimensional transition metal dichalcogenides
Semiconducting transition metal dichalcogenides (TMDCs) have attracted intense research interest in recent years, due to their many unique electrical, optical, and mechanical properties and their potential for diverse applications. One of the key challenges in 2D TMDC electronics is to synthesize …
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STM Study of Interfaces and Defects in 2D Materials
… and defects 2D transition metal dichalcogenides (TMDCs). The first part of the thesis focuses on the synthesis of 2D TiSe2 with chemical vapor transport (CVT). By properly choosing the growth condition, Sub-10 nm TiSe2 flakes were successfully obtained. A 2 × 2 charge density wave (CDW) was …
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Ring Resonators Intergrating With Dichoric Materials And In Spin-valley Controlled Photonic Topological System
… materials, Transition Metal Dichalcogenides (TMDCs) Optically biased by a circularly polarized laser are suggested to give arise the nonreciprocal optical response. TMDCs are known to provide unique optical properties as two-dimensional materials taking advantage of miniaturization and …
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Development of Transition Metal Dichalcogenide Memristive Materials and Devices for Neuromorphic Systems
… 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 devices remain key …
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Synthesis, Superstructure, Vacancy-Ordering of Intercalated Transition Metal Dichalcogenides
… intercalated transition metal dichalcogenides (TMDCs) 6R-CuxTa1+yS2 and 2H-CuxTa1+ySe2, as well as the compound Cu3TaSe4. Synthesis of these compounds has been performed by the method of chemical vapor transport, using iodine as a transporting agent. X-ray diffraction may reveal superlattice …
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INVESTIGATION OF PHASE TRANSFORMATIONS IN TRANSITION METAL DICHALCOGENIDES DURING SYNTHESIS AND POST GROWTH
Transition metal dichalcogenides (TMDCs) are promising candidates for use in beyond-Moore electronics, photovoltaics, sensing, and energy storage devices. The highly anisotropic crystal structure of TMDCs is characterized by chemically active edge sites and relatively inert basal plane layers, …
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Progress on 2D-MoS2: development of a scalable fabrication method and demonstration of an X-ray detector
Two-dimensional transition metal dichalcogenides (TMDCs) aroused significant interest in the last years as semiconductor materials for application in the field of electronics, due to their tunable bandgap, good carrier mobility, and strong light absorption. Among TMDCs, two-dimensional molybdenum …
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Electrical, electronic and optical properties of MoS2 & WS2
… 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 optoelectronics as light emitters, …
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Scanning tunneling microscopy investigations of transition metal dichalcogenide 1t-tantalum disulfide and zigzag-shape graphene nanoribbons in ultra-high vacuum
… 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 exfoliation of desired …
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Scanning Probe Microscopy Study of Molecular Nanostructures on 2D Materials
… thin transition-metal dichalcogenides (TMDCs) material. TMDCs are emerging 2D materials recently due to their intriguing physical properties and potential applications. In particular, our study focuses on molybdenum disulfide (MoS2) mono- to few-layers and pyramid nanostructures …
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Phase-Engineered Field-Effect Transistors Based on Two-Dimensional Transition Metal Dichalcogenides
… (2D) transition metal dichalcogenides (TMDCs) are layered materials in which each unit consists of a transition metal (Mo, and W) layer sandwiched between two chalcogen (S, Se, and Te) atomic layers. They can exist in either a semiconducting or metallic phase. Semiconducting TMDC based …
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Fabrication and integration of graphene field effect transistors for advanced biosensing platforms
… such as transition metal dichalcogenides (TMDCs) and graphene derivatives, numerous applications studies have been carried out prompted by the remarkable material properties they have. A variety of investigations have established unique potential of 2D material-based biosensors and …
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Energy Conversion Materials: Computational Design of Electrocatalysts Toward Sustainable Energy Applications
… breaking of the linear scaling relationship for TMDCs, offering lower over-potentials and high selectivity. Fabrication of the reconstructed edges were explored using a controlled atomic fabrication method, delivering realizable stable structures with calculations performed to confirm the …
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Selective area chemical vapor deposition of graphene
… graphene and transition metal dichalcogenides (TMDCs), offer great opportunities for developing “beyond CMOS” electronic devices and other future electronic and photonic devices. However, there are still several critical challenges for graphene applications, such as mass production of …
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Assembly and integration of two-dimensional nanomaterials for advanced interfaces and sensors
… graphene and transition metal dichalcogenides (TMDCs), have captivated academic and industrial attentions because of their promise in future electronics, surface coating, biosensing, as well as the compatibility with the scalable and low-cost, top-down fabrication process. In this dissertation, …
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Nanoscale light-matter interaction of ultrathin materials
… various neighbors — molecules, graphene, other TMDCs, individual metal nanoparticles and plasmonic crystals. The results are detailed for TMDC–plasmonic crystal hybrids, showing that only momentum‐dark excitons couple strongly to confined near fields. Numerical diagonalization reveals a triplet …
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Controlled doping of organic semiconductors and 2d materials with molecular reductants and oxidants
New air-stable dimeric n-dopants are synthesized and studied in detail with respect to the kinetics of both their redox reaction in solution with and their doping in the solid-state of various organic semiconductor acceptors. Detailed mechanistic studies are necessary to recognize the strengths and …
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