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 26 for “"ELECTRONIC CHARGE"”.
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Electronic charge injection and transport in organic field-effect transistors
Electronic devices based on organic semiconductors, such as field-effect transistors (FETs) and light emitting diodes have attracted much interest as possible inexpensive and flexible alternatives to inorganic devices. Despite considerable improvement in device properties, a better understanding of …
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Molecular-Level Understanding of Ionic & Electronic Charge Storage Mechanisms in Rechargeable Aluminum Batteries Using Sold-State NMR
<p>Rechargeable aluminum-ion batteries are safe and low-cost alternatives to traditional lithium-ion batteries due to the high volumetric capacity (8040 mAh/cm<sup>3</sup>) of aluminum. However, very few electrode materials have shown reversible aluminum ion intercalation. Intercalation …
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Factors affecting the rate of electron transfer in mixed-valence biferrocenium cations
… process. It involves the movement of localized electronic charge from one atom, ion, or molecule to another. Despite its obvious fundamental nature, its practical importance, and several decades of active research, the factors which affect or control the electron transfer process are still not …
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Rotational spectra and molecular structures of organometallic and organic molecules
… investigates the gas phase rotational spectra, electronic charge distributions and molecular structures of organometallic and organic molecules, using high-resolution pulsed beam Fourier transform microwave spectroscopy (PBFTMS) and computational methods. High-resolution rotational spectra and …
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ΣΥΝΘΕΣΗ ΦΑΣΜΑΤΟΣΚΟΠΙΚΗ ΚΑΙ ΚΒΑΝΤΟΧΗΜΙΚΗ ΜΕΛΕΤΗ ΣΥΜΠΥΚΝΩΜΕΝΩΝ (Β) ΚΙΝΟΞΑΛΙΝΙΚΩΝ ΣΥΣΤΗΜΑΤΩΝ ΚΑΙ ΠΑΡΑΓΩΓΩΝ ΤΟΥΣ
… (1H AND 13C-NNIR) INCONNECTION WITH A CALCULATED ELECTRONIC CHARGE. POLAROGRAPHY OF 1,4-DIOXIDES AND QUINOXALINES. RELATION BETWEEN THE E1/2R AND ELUMO. SUPERDELOCALIZABILITY AND ENERGIES OF FMO WERE STUDIED.
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The synthesis of some substituted 7-(1-Naphthyl)- Benz(a)Anthracenes
… is a correlation between the calculated total electronic charge of the K-region and this carcinogenic activity. There is also ample proof that benz(a)anthracene derivatives are honed to the skin through quinoid type bonds in the K"region. However, the prediction of physiological activity of …
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Higher-order topological phases with crystalline symmetries
… displays gapless corner states and quantized 1/2 electronic charge localized at the corners of the lattice. The topologies in HOTIs are usually protected by crystalline symmetries. In this dissertation, we systematically study the charge fractionalization in 2D HOTIs under rotation symmetries. We …
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Effects of Electron-Vibron Coupling in Single-Molecule Magnet Transport Junctions Using a Hybrid Density Functional Theory and Model Hamiltonian Approach
… Vibrational modes of the SMM can couple to electronic charge and spin degrees of freedom, and this coupling also influences the magnetic and transport properties of the SMM. The effect of electron-vibron coupling on transport has been extensively studied in small molecules, but not yet for …
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Electric multipole moments and higher-order topological phases in crystalline insulators and superconductors
… in crystalline insulators. The notion that electronic wave functions of energy bands in crystalline insulators have Berry phases associated with the positions of electronic charge is at the basis of our understanding of topological band theory. We show, by using the Berry phase formulation …
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THEORETICAL PREDICTIONS OF POTENTIALS FOR INTERMEDIATE STEPS IN METHANOL AND ETHANOL ELECTROCHEMICAL OXIDATION ON Pt(111)
… the solvent, and allows adding or subtracting electronic charge to the solute or the surface with considering electrolyte response. Adsorption energies for reaction intermediates were calculated and used along with reversible potentials in bulk solution to predict surface reaction reversible …
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Synthesis of 1T-Tantalum (IV) Sulfide and observation of charge density wave using scanning tunneling microscopy
… material system for post-silicon logic and opto-electronic applications, staggering 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 …
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Electronic transport in Lithium Nickel Manganese Oxide, a high-voltage cathode material for Lithium-Ion batteries
… has a great effect on the concentrations of electronic charge carriers, and thus an effect on the DC electronic conductivity of the material. This conductivity was thus measured for both processing conditions as a function of the lithiation state, and then related to carrier concentrations …
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Optical Characterization of chemically doped and/or intercalated thin layers graphene: Raman and Contrast Study
… We analyze and model the intramolecular electronic, charge transfer, and multiple reflection electromagnetic mechanisms responsible for the unusual sensitivity. We attribute the large Raman signal from both adsorbed iodine and intercalated bromine species to intramolecular electronic …
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Theoretical study of carbon nanotubes adsorbed on the silicon (100) surface and explorations on the modulation of conductance for metallic carbon nanotubes
… for these hybrid systems as compared with the electronic gaps of their isolated constitutive components was found. This is caused by the changes in the electronic structure as the surface reconstructs due to the tube's proximity, the concomitant electronic charge transfer from the nanotubes, …
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Identities and Catalytic Functionalities of Reactive Hydrogen Species during Hydrogen Addition and Oxygen Removal Reactions of Carboxylic Acids, Carbonyls, and Phenols at Transition Metal-solvent Interfaces
… the origin, chemical identities, and electronic charge of reactive H species and connects these properties to their catalytic roles within the complex reaction network. These roles depend on the solvent and reactant identity and lead to rate equations that depend on the number of …
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The effects of ambipolar diffusion, dust, and ultraviolet radiation in the formation of cores and protostars in interstellar molecular clouds
… component of the interstellar medium, can become charged, couple to the magnetic field, and decrease the rate of ambipolar diffusion in a cloud. In this thesis we model the self-initiated formation and contraction of cloud cores due to ambipolar diffusion in axisymmetric, self-gravitating, …
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Synthesis and characterization of ruthenium complexes with (N-N)(P-P) and (N-P)2 donor sets
… influence on the NLO merit by introducing new electronic charge-transfer transitions, oxidation state and coordination sphere of the metal centers. In this work, the donor sets of the ruthenium complexes were modified from the most investigated (P-P)(P-P) to (N-N)(P-P) and (N-P)2 and a series …
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Synthesis and characterization of ruthenium complexes with (N-N)(P-P) and (N-P)2 donor sets
… influence on the NLO merit by introducing new electronic charge-transfer transitions, oxidation state and coordination sphere of the metal centers. In this work, the donor sets of the ruthenium complexes were modified from the most investigated (P-P)(P-P) to (N-N)(P-P) and (N-P)2 and a series …
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Atomic-Scale Design at the 2D/3D Interface using Electron Microscopy
… how the interface structure influences local electronic and excitonic properties. We observe reproducible moiré periodicities which vary the electronic charge density, and explain the emergence of an excitonic peak related to the 2D/3D interface via dielectric screening by the 3D contact. We …
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Optical study of InP related semiconductor alloys;spectroscopic ellipsometry
… disorder, self-ordering, strain, and dopants on electronic band structure of InxGal-xP grown on GaAs, InxGa1_xP grown on GaP substrate with composition-graded InGaP buffer layer and lattice matched (AlxGa1_x)o.sino.sP grown on GaAs semiconductor alloys with assistance from measurements of Raman …
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