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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 22 for “"Morphology Control"”.
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Hybrid Devices : Morphology Control by Self-Assembly
… at the improvement of light harvesting and the control of morphology. Hybrid devices combine the advantage of excellent electronic properties of inorganic semiconductors and the convenient processability of organic materials. However, the creation of suitable morphologies which guarantee a high …
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Polymorph Selection with Morphology Control Using Solvents and Additives
… Sulphathiazole form I normally has a needlelike morphology. Form I with a modified rodlike morphology was produced by crystallization from 1-propanol with the addition of methanol in low concentration, showing that it is possible to control the morphology and selectively isolate polymorphs. …
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Drug eluting prosthetic joints through drug cluster morphology control
More than one million joint replacements are performed in the USA annually. However, around 10 % of patients require revision surgery within 10 years with prosthetic joint infections (PJI) as a common reason. PJI has a recurrence rate of 16 %, a mortality rate of 2.5 %, and end-stage treatments …
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Structure and Morphology Control in Carbon Nanomaterials for Nanoelectronics and Hydrogen Storage
… optical and electronic technologies. However, controlling these characteristics in a scalable fashion has been extremely difficult. Although some progress has been made in controlling the quality, diameter distribution and other characteristics of carbon nanotube samples, several issues still …
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First-principles modeling of thermal stability and morphology control of cathode materials in Li-ion batteries
… This thesis also studies surface properties and morphology control of olivine structure LiMPO₄ (M=Fe, Mn). The calculated surface energies and surface redox potentials are very anisotropic. With the calculated surface energies, we provide the thermodynamic equilibrium shape of a LiMPO₄ crystal …
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Formation rates of silver metal danoprisms as a function of halide concentration
<p>anosystem morphology control is proving to be vital for developing nano technologies. This control allows for the optimization of a nanoparticle’s optical and electrical properties. One form of control is the addition of defects during nanocrystal formation. Nanoprisms are highly responsive to …
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Novel Preparation of Porous Alumina using Ice Particles as Pore-Forming Agents
… in the 2-3 mm range. Amount of porosity was controlled through specifying the amount of ice added to the ceramic slurry. Samples were prepared with porosity levels ranging from 30-75%. As a completely new process, these initial results are quite promising and further development will allow …
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Molecular design for controlling morphology in organic electronics
… of photovoltaics, with an emphasis on morphology control in polymer bulk-heterojunction devices. Chapter 2 describes the synthesis of a class of polymer additives for bulk-heterojunction (BHJ) solar cells based on an extended triptycene-containing unit. The incorporation of these …
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Formation and alteration of magnetite nanoparticles
… are strongly size-dependent and achieving size control under preferably mild synthesis conditions is of interest in order to obtain particles with required properties. By using a custom-made setup, it was possible to synthesize stable single domain magnetite nanoparticles with the …
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Mesoporous ZnO/TiO2 nanowire heterojunction photo-anodes for quantum-dot sensitised solar cells
… temperatures and offer greater flexibility in morphology control, allowing for tailored architectures that optimise light harvesting and QD dot loading. This combination of excellent charge transport properties, tunable morphology and cost-effective synthesis makes ZnO NWs a highly promising …
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Rational control of hydrothermal nanowire synthesis and its applications
… thesis presents the fundamental understanding of controlled zinc oxide nanowire synthesis in a hydrothermal system based on thermodynamic / kinetic analysis of heterogeneous chemical reactions. Governing parameters of hydrothermal growth were evaluated with experimental growth rates and calculated …
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Modeling and theoretical design methods for directed self-assembly of thin film block copolymer systems
… self-assembly process to obtain greater control over long range order, the local morphology, and overall throughput of the patterns produced. This work looks at key modeling challenges in optimizing BCP DSA to achieve precision morphology control, reproducibility, and defect control. …
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Annealing for intrinsic point-defect control and enhanced solar cell performance : the case of H₂S and tin sulfide (SnS)
… in H₂S/H₂ gas mixtures will improve film morphology, control majority carrier concentration and reduce sulfur vacancy mid-gap states. Using the Kröger-Vink defect equilibria model of defect concentrations and DFT-calculated enthalpy of formations for intrinsic defects, predictions are made …
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About the role of physico-chemical properties and hydrodynamics on the progress of a precipitation reaction
The size and morphology control of precipitated solid particles is a major economic issue for numerous industries. For instance, it is interesting for the nuclear industry, concerning the recovery of radioactive species from used nuclear fuel. The precipitates features, which are a key parameter …
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Thiosemicarbazone, xanthate and dithiocarbamate single source precursors for cadmium, lead and indium sulfide nanoparticles
… a significant influence on the particle size, morphology and optical absorption properties of the nanoparticles. Different analytical tools were used to establish the properties of the nanoparticles, among them are powder X-ray diffraction, the transmission electron microscopy and UV-Vis …
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Influence of Structural Disorder on Charge Transport and Stability in Organic Field-Effect Transistors with Molecular Semiconductors
… our research underscores the importance of morphology control and process optimization in overcoming the challenges related to the solution-based self-assembly of MSC molecules. The systematic exploration of thermal effects on Ph-BTBT-C10 thin films and transistors provides critical insights …
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Synthetic Levers Enabling Control Of Phase, Size And Morphology In Transition Metal Phosphide Nanoparticles (fe, Ni)
… <p><strong>SYNTHETIC LEVERS ENABLING CONTROL OF PHASE, SIZE AND MORPHOLOGY IN TRANSITION METAL PHOSPHIDE NANOPARTICLES (FE, NI)</strong></p> <p>by</p> <p><strong>ELAYARAJA MUTHUSWAMY </strong></p> <p><strong>May 2011 </strong></p> <p><strong>Advisor:</strong>Dr. Stephanie L. Brock</p> …
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TiO2 and ZnO metal oxides lattice defects driven magnetism and their contribution in discoloring of dyes
… on the ZnO hierarchical structures morphology control which were synthesized at different times, 15, 30 and 60 minutes. We have observed rather a non-increasing trend but quite constant as the UV irradiation time is increased to maximum of 2 hours. However, the 30 and 60 minutes’ …
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Designing New Pt-Based Catalysts: Dual Manipulation of Highly-Branched Structures and Intermixed Compositions
… four sections, with a particular emphasis on the control of two aspects of anisotropic nanoparticle (NP) growth; manipulating highly-branched morphologies and also composition. This dual control of properties promises to significantly reduce Pt reliance and synthesis cost and complexity while …
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Multi-scale morphology development in solution coated conjugated polymers
… meniscus instability lead to various coating morphology and drives morphology transition during conjugated polymer deposition. We investigated the out-of-plane molecular orientation influenced by liquid crystalline mesophase and the in-plane crystalline polymer fiber alignment determined by …
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