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 345 for “"Core-shell"”.
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Fabrication of Core-Shell Nanoparticles
Metallic Cu and Au shells were fabricated around cobalt nanoparticles. A new technique to coat nanoparticles with carbon coatings and poly(methyl methacrylate) (PMMA) was developed. The copper shell formation is a self-limiting process. A thin copper shell (0.82 nm) around the cobalt nanoparticle …
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Core -Shell Microspheres for Biomedical Applications
… for the delivery of drugs and imaging agents. Core-shell protein or polymer microspheres are biocompatible vesicles that have been used to meet the goal of transporting drugs or contrast agents to diseased tissues via the circulatory system. They consist of a hydrophobic core surrounded by a …
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Polymeric nanocarriers with dendritic core-shell architectures
Hyperbranched polymers, polyglycerol and polyethylenimine, were functionalised in order to tailor systems that can be used in medical applications. The systems described in this thesis can be used for pH controlled release of drug molecules and were also investigated towards their gene transfection …
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Core-shell printing of functional polymer filaments
… a constant rate of travel. In the present work, core-shell printing techniques are introduced to expand the capabilities of direct-write assembly. Through the use of a viscoelastic shell ink, it is possible to print continuous filaments of a Newtonian liquid core without leakage or droplet …
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Understanding the Influence of Interfacial Chemistry in Core, Core/Shell and Core/Shell/Shell Quantum Dots on their Fluorescence Properties
… the processes at the interface, namely core-ligand, core-shell and shell-shells, to the overall quantum dots fluorescence properties are not well understood. Specifically for cores, relating surface-atoms interactions, solvents, ligands nature, density and functional groups on quantum …
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Refractory oxides based multilayered core@shell plasmonic nanostructures
… numerical, and analytical investigations of core@shell plasmonic nanostructures consist of noble metals and refractory oxides are presented. Such structures show significantly improved thermal stability due to the protective oxide layers, while retaining the excellent plasmonic properties of …
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Preparation and characterization of bimetallic core-shell nanoparticles
… two novel techniques for synthesising bimetallic core-shell nanoparticles. The first technique is the chemical deposition of transition metal salts onto gold nanoparticle seeds. The transition metals used were platinum, palladium and rhodium. Gold nanoparticle seeds were produced using published …
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Modeling analysis of core-shell Si/SiGe nanowires
… transport properties for a Si/SiGe core-shell nanowire are compared with the related properties for a Si nanowire and a SiGe nanowire. The Si/SiGe core-shell nanowire shows a better thermoelectric performance than its Si nanowire counterpart. On the other hand, by relaxing the harsh …
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Incorporation of silica into baroplastic core-shell nanoparticles
Core-shell baroplastics are nanophase materials that exhibit pressure-induced flow at low temperatures and high pressures. Core-shell baroplastics used in this work are comprised of a low Tg poly(butyl acrylate) (PBA) core and a high Tg polystyrene (PS) shell. These novel polymer systems can be …
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Determinants of Core Shell Dependent Rotavirus Polymerase Activity
… RV protein, VP2, which comprises the innermost core shell layer of the virion. Though these VP1-VP2 interactions are essential for RV replication, the mechanism by which the core shell regulates polymerase activity remains incompletely understood. Here, we sought to identify and characterize …
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Structure, Dynamics and Association of Thermosensitive Core-Shell Particles
… dynamics and association of thermosensitive core-shell particles. The particles consist of a solid core of poly(styrene) with a thin layer of poly(N-isopropylacrylamide) (PNIPAM) onto which a network of PNIPAM is affixed. The degree of crosslinking of the PNIPAM shell effected by the …
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Synthesis and Characterization of Protein-Polymer Core-Shell Structures
… all BNPs-based materials, BNPs-polymer core-shell structures with the polymer as the core and BNPs as the shell can find poteinal applications such as drug delivery and cell binding. However, no methods to form the BNPs-polymer core-shell structures have been reported.</p><p>In chapter …
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MULTISCALE MODELING OF III-NITRIDE CORE-SHELL SOLAR CELLS
… of recently reported nanostructured III-nitride core-shell MQW solar cells are governed by an intricate coupling of size-quantization, atomicity, and built-in structural and polarization fields. The core computational framework, as available in our in-house QuADS 3-D simulator, is divided into …
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pH-sensitive core-shell nanoparticles for intracellular drug delivery
… address this issue, we designed a pH-sensitive core-shell nanoparticle to segregate the functions of the particle into an endosome-disrupting pH-responsive core that would absorb protons at endolysosomal pH, and a shell whose composition could be tuned to facilitate particle targeting, cell …
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Fabrication and Characterization of ZnO/CuO Core-Shell Nanowire Arrays
… applications.</p> <p>In this thesis, ZnO/CuO core-shell nanowire arrays have been successfully fabricated by a simple three-step process. ZnO nanowire arrays were first grown by the hydrothermal method using ZnO seeded substrates. Copper then was deposited on as-grown ZnO nanowire arrays by a …
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II-VI Core-Shell Nanowires: Synthesis, Characterizations and Photovoltaic Applications
… nanowires with a coaxial structure, namely, core-shell structures have demonstrated significant advantages over other device configurations in terms of radial charge collection and cost reduction. In this dissertation, several core-shell nanowire structures, including ZnO/ZnSe, ZnO/ZnS, and …
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Development of Polymer-Biomolecule Core-Shell Particles For Biomedical Applications
… proteins and polymers to create polymer-protein core-shell nanoparticles (PPCS-NPs). Several proteins with different isoelectric points and molecular weights were employed to demonstrate a versatility of our assembly method while a series of esterified derivatives of poly(2-hydroxyethyl …
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Preparation characterisation and evaluation of core shell electrocatalysts for PEMFCs
… it has been shown that thin layers of platinum (shell)<br/>over a non-Pt core enhance the activity. In addition surface science studies have found that<br/>overlayers of one metal on another strongly modifies the electrocatalytic properties of the<br/>surface metal. The aim of this project is to …
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Preparation, characterisation and evaluation of core-shell electrocatalyst for PEMFCs
… it has been shown that thin layers of platinum (shell)<br/>over a non-Pt core enhance the activity. In addition surface science studies have found that<br/>overlayers of one metal on another strongly modifies the electrocatalytic properties of the<br/>surface metal. The aim of this project is to …
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Cs-Pb-Br Core-shell Perovskite Microcrystals for Stability Improvement
… of LHP NCs against environmental stress, core-shell NCs can be created by growing a shell on the surface of core NCs, drawing inspiration from chalcogenide semiconductor NCs. In this sense, there are multiple organic materials (e.g., phenylpropylammonium bromide and polymethyl …
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