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 45 for “"Controlled synthesis"”.
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Controlled synthesis of magnetic particles
… using external forces. For this reason, the synthesis of large, superparamagnetic particles is very important and is desirable for future applications. The purpose of this work is (1) to examine the three synthesis methods of superparamagnetic units, (2) to understand the behavior of …
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Controlled Synthesis and Characterization of Magnetic Chalcospinels Nanocrystals
… as an important approach to size and shape-controlled synthesize of nanocrystals. We have also discussed the importance of metal doping reactions as a pathway to create previously unavailable multielemental materials for high-performance applications. In this set of studies, colloidal …
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Kinetically Controlled Synthesis of Triblock Copolymer Stabilized Gold Nanoparticles
… impact of organic solvents in gold nanoparticle synthesis have motivated the search for more environmentally benign alternatives. One viable approach is the synthesis of AuNPs from tetrachloroauric(III) acid (HAuCl4) using triblock copolymers (TBPs). However, a major challenge of using TBPs is …
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CONTROLLED SYNTHESIS OF TOPOLOGICALLY TEMPLATED CATENANE AND KNOTTY POLYMER
… high yields. Chapter 1 reviews template directed synthesis of low molecular weight catenanes and the trefoil knot. In addition, recent advances in synthesis of topologically similar cyclic polymer via end-to-end cyclization of linear analogue or ring-expansion polymerization from cyclic …
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Strategies for the Controlled Synthesis of Oligomeric Natural Products
… B, Helisorin, and Helisterculin A - The total synthesis of three members of the helicterin family of natural products, helicterin B, helisorin and helisterculin A, was completed from a common, non-biomimetic intermediate. This work featured the development of a complex retro …
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Controlled synthesis and characterization of templated, magneto-responsive nanoparticle structures
Magnetic fluids are colloidal dispersions of magnetic nanoparticles that are stable with respect to gravitational and moderate magnetic fields because of their small particle size, and to unbounded aggregation due to their surface coatings. The interaction between individual magnetic nanoparticles …
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Template-Controlled Synthesis of Magnetic/Semiconducting Nanoparticles within Amphiphilic Core-Shell Cylindrical Polymer Brushes
… a combination of anionic polymerization (for the synthesis of the backbone) and atom transfer radical polymerization (ATRP, for the synthesis of the side chains). The formation of well-defined brushes was confirmed by 1H-NMR and GPC. The selective hydrolysis of the PtBA block of the side chains …
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A detailed study on controlled synthesis and device integration of monolithic graphene-graphite structures
This thesis presents the controlled synthesis and the characterization of monolithic graphene and graphite through low pressure chemical vapor deposition (LPCVD) method. Selective patterning of heterogeneous metal catalysts enables a simultaneous and controlled growth of graphene and graphite with …
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Controlled synthesis of complex organic molecules and nanomaterials: Engaging chemical properties for biological applications
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2024-09-16 without embargo terms
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Controlled synthesis of complex organic molecules and nanomaterials: Engaging chemical properties for biological applications
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2024-09-16 without embargo terms
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Morphology Controlled Synthesis of Copper Based Multimetallic Nanostructures and Their Electrocatalytic Properties for Methanol Oxidation Reaction
… research focuses on the development of shape-controlled synthesis of Cu NM, Cu-based bimetallic and trimetallic nanostructures, and their electrocatalytic properties for methanol oxidation reaction (MOR). Copper nanomaterials (Cu NM) with specific surface facets can tailor their catalytic …
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Ordered arrays of nanocrystals : synthesis, properties and applications
… emerging themes in nanoscale research are: controlled synthesis with well defined sizes and geometries; unraveling their fundamental physical properties; and assembly of these nanoscale building blocks into functional devices. Although several approaches for producing the nanoparticles have …
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Atomistic modeling and simulations of 2D materials : chemical vapor deposition, nanoporous defects, force-field development, wetting, and friction
… However, physical understanding of the controlled synthesis and interfacial behavior of 2D materials is still lacking. In this thesis: First, I construct a generalized mechanistic model for the growth of TMD monolayers using chemical vapor deposition (CVD). Combining kinetic Monte Carlo …
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Synthetic Retinoids
… vinylic C-H borylations for the stereo-controlled synthesis of stilbene-based TTNPB retinoids. Chapter three details the application of Ir-catalysed aromatic C-H borylations, Sonogashira cross-couplings and Suzuki-Miyaura cross-couplings for the synthesis of tolan-, and biaryl-based …
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A Concise, Stereocontrolled Total Synthesis of Rippertenol
… the current level of understanding regarding the controlled synthesis of these molecules in order to place the studies described in Chapters 2 and 3 in better context. A unique tricyclic polyunsaturated ketone intermediate was synthesized as a platform from which to approach cycloaddition …
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Development of x-ray luminescence detection system and characterization of x-ray irradiated quantum dots for image-guided x-ray photodynamic therapy
… modality. This study also demonstrates how well-controlled synthesis parameters of QDs such as elemental composition and dopant integration foreshow mechanisms of XL. Superimposed images of optical and XL signals are also presented to show potential fluorescence microscope imaging applications. …
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Microfluidic synthesis of colloidal nanomaterials
… focuses on microfluidics based approaches for synthesis and surface-engineering of colloidal particles. Bottom-up assembly through colloidal nucleation and growth is a popular route to the controlled synthesis of nanomaterials. Standard bench-scale synthetic chemistry techniques often involve …
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Bioinspired fabrication and assembly of hybrid materials for sensing and biomedical applications
… have to be overcome. First, control over the synthesis of nanomaterials with well tailored shapes and properties should be achieved. Second, for sensing and biomedical applications, the nanomaterials should be engineered to acquire target recognition abilities for selective targeting and …
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Novel multiphase chemical reaction systems enabled by microfabrication technology
… are fast and involve toxic intermediates: the controlled synthesis of phosgene is such a reaction and has been demonstrated in a microfabricated packed bed reactor. Owing to the high surface-to-volume ratios, micro chemical systems also have the potential to make improvements in process …
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Thermodynamically Driven (Reversible) End-Capping of Pseudorotaxanes to Produce Rotaxanes
… is an efficient method to provide a better controlled synthesis of specific structures. This synthetic approach takes advantage of a labile bond between the guest molecule and the end stopper group. The reversibility of this bond allows for threading by the host molecule via chemical …
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