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 36 for “"Organic Molecule"”.
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Electrochemical and spectroscopic interfacial investigations of small organic molecule electrooxidation on platinum electrodes
In support of the recent interest in fuels from renewable resources for fuel cells, the intermediates of the oxidation of formic acid and ethanol to CO2 on platinum electrodes have been examined. The adsorbed carbon monoxide intermediate continues to be the cause for a decrease in efficiency and …
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Study of Triplet Exciton Dynamics in Small Organic Molecule Films Using Time Resolved Optical Spectroscopy
… can be crucial in improving the efficiency of organic light emitting devices and solar cells. This thesis reports an investigation of triplet exciton dynamics in small organic molecule single and multilayer layer films using optical time resolved nanosecond spectroscopy. A diligent step by step …
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Control of Energy Transfer and Molecular Energetics using Photonic Nanostructures
… transfer of energy between two sets of molecules where the separation is an order of magnitude higher than the traditional limit beyond which the energy transfer is usually too small to be observed. We also utilize “strong coupling” : a regime of light-matter interaction that results in …
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THE SPINTERFACE PROBLEM: AB-INITIO STUDIES OF FE-PHTHLOCYANINE ON TRANTITION-METAL OXIDES.
… between a transition-metal oxide and a metal-organic molecule, electrons form interesting hybrid electronic states that characterize what is commonly called an organic spinterface. The central idea of our study is the possibility of exciting a spin coherent wave inside the substrate through a …
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Material engineering for Li-ion capacitors and Li-ion batteries
… and scarce transitional metals. Electroactive organic molecule-based cathodes which can reversibly store Li-ions are environmentally benign alternatives. Here, we assessed electrochemical performance of a plant-based organic molecule (lawsone) and showed that its oligomer structure stabilizes …
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Surface chemistry research of electronic processes and electronic devices
… is much weaker than on Fe surface. The remaining organic groups on the Co surface show little carbanion and C-O groups after acac exposure, indicating a different mechanism comparing with the Fe surface. In the second topic, surface photovoltage (SPV) measurements using XPS was utilized for …
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Anisotropic EPR and ENDOR studies of sulfur-containing heterocyclic compounds adsorbed on silica-alumina surfaces
The physical phenomenon of an organic molecule adsorbing onto a silica-alumina surface is a topic of great interest. Many questions concerning exactly how this phenomenon occurs still remain unanswered. Although Electron Paramagnetic Resonance and Electron-Nuclear Double Resonance techniques are …
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Spin injection and manipulation in organic semiconductors
The use of organic semiconductors to enable organic spintronic devices requires the understanding of transport and control of the spin state of the carriers. This thesis deals with the above issue, focusing on the interface between the organic semiconductor and the spin source. The morphology of …
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Fabrication of Metal and Organic Nanostructures on Silicon(100) With Scanning Tunneling Microscope-Based Lithography
… this technique is applied to the fabrication of organic and metal-containing nanostructures on the Si(100) surface. Norbornadiene, an olefinic organic molecule, is shown to react selectively with STM-depassivated areas to form nanometer-sized regions with a norbornadiene adlayer. Metal CVD …
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NEW GO- AND RGO-BASED MORALS AND CARBENE-FUNCTIONALIZED GOLD NANOPARTICLES FOR HETEROGENEOUSLY CATALYZED REDUCTIONS
… The first one is MORALs, an acronym for Metal-ORganic ALloys, a class of materials composed of organic molecules embedded in metal particles. In previous studies, this class of materials has been reported to exhibit improved catalytic properties compared to the single metal or organic molecule …
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Molecular and quantum dot floating gate non-volatile memories
… flash memories. As an example, a single organic molecule of 3,4,9,10 -parylene tetracarboxylic dianhydride (PTCDA) occupies lnm2 in area and is capable of storing and retaining a single charge. If a defect is present in the tunneling oxide below the floating gate, only a few molecules of …
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Inhomogeneous 1H NMR spin-lattice relaxation in the organic superconductor κ-(BEDT-TTF)2-Cu[N(CN)2]Br
The two-dimensional superconductors based on the organic molecule “ET” have been an active area of research since their discovery over two decades ago. The member of this family with the highest critical temperature, κ-(ET)2Cu[N(CN)2]Br (Tc=11.7 K), has seen renewed interest since the observation …
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Dendrimer Modified Silica Nanoparticles as Fluorescent Chemosensors for the Detection of Copper and Cyanide Ions
… prove the applicability of the systems as small organic molecule sensors. In the future, the same SNPGx-Dye sensing system can be customized to sense additional analytes like polycyclic aromatic hydrocarbons, explosives, and amino acids.</p>
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First Principles Study Of Tribopolymerization On Conductive Material Surfaces
While tribopolymer, usually formed due to organic-molecule polymerization under contact surfaces frictions, is used to lubricate and to protect the surfaces of mechanical gears, it is considered as a major source of contamination to Micro-electro-mechanical system and Nano-electro-mechanical system …
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Quantum theory of sensing and thermoelectricity in molecular nanostructures
… properties of molecular junction single organic molecules: They include perylene Bisimide (PBIs), naphthalenediimide (NDI), metallo-porphryins and a large set of symmetric and asymmetric molecules. Two main techniques will be included in the theoretical approach, which are Density …
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Imaging Single-Electron Charging in Nanostructures by Low-Temperature Scanning Force Microscopy
… nanoparticles that are linked to a CNT by an organic molecule. While gold nanoparticles naturally exhibit single-electron charging at low temperature, it is disorder that causes the formation of quantum dots in long semiconducting CNTs at low carrier density. Our instrument of choice is a …
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Interfacial Electronic Structure of Dipolar Vanadyl Naphthalocyanine Thin Films
… of the fundamental physics of the electrode/organic molecule interface in both the ground and excited state manifolds. Systematic investigations of single systems using two-photon photoemission (TPPE) and ultraviolet photoelectron spectroscopy (UPS) were undertaken in order to assess the …
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Enhancing Stability in Quantum-Dot and Perovskite Optoelectronic Devices through Compositional Engineering and Surface Treatment
… the conventional ZnMgO ETL with a bifunctional organic molecule that passivates QD surface traps and suppresses ion migration, thereby producing InP QD-LEDs with higher efficiency and improved stability. Secondly, I stabilize the ZnMgO with an ultrathin Al2O3 coating, which extended the …
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Advances in molecular scale electronics: Synthesis and testing of nanoscale wires and devices
… The use of a discrete, highly conjugated organic molecule as a molecular scale wire to conduct an electric current has been demonstrated. We have developed molecular scale gates, from organic molecules, that can be altered "on" and "off" with the use of an electric field. Additionally, we …
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Effects of transmembrane hydraulic pressure on the performance of forward osmosis membranes, The
… pressure on water flux, reverse salt flux, inorganic ion rejection, and bidirectional solute flux. An organic feed solution in conjunction with NaCl draw solution were also used to investigate changes in membrane rejection of organic molecules. Results from this study revealed that …
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