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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 174 for “"Templating"”.
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Direct liquid crystal templating of mesoporous silica
… of ordered<br/>mesoporous silicas by direct templating from lyotropic liquid crystal phases of the<br/>surfactants Pluronic PI23, Pluronic F127, CTAB and Brij 78. The factors affecting the<br/>regularity, morphology, pore diameter and wall thickness of the templated mesoporous<br/>silicas …
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Block copolymer self-assembly and templating strategies
Block copolymers microphase separate to form periodic patterns with period of a few nm and above without the need for lithographic guidance. These self-assembled nanostructures have a variety of bulk geometries (alternating lamellae, gyroids, cylinder or sphere arrays, tiling patterns, core-shell …
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Cubosome and Hexosome Microparticles: Shape, Rheology, and Templating
Cubosomes and hexosomes are soft particles of cubic and hexagonal phases, formed by self-assembled amphiphilic lipids. They have attracted great attention because of applications in drug delivery. Cubosomes and hexosomes have been produced at the nanoscale, exhibiting unique shapes and symmetries, …
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Supramolecular templating of mesoporous zirconia-based nanocomposite catalysts
… through the development of supramolecular templating chemistry. The unique surface and structural properties of these zirconia-based mesoporous materials are related to their activities in solid acid catalysis. The three systems of interest, (i) phosphated zirconia, (ii) zirconia-silica, …
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Formation of Meso-Structured Multi-Scale Porous Titanium Dioxide by Combined Soft-Templating, Freeze-Casting and Hard-Templating Using Cellulose Nanocrystals
… with tunable meso-scale morphology. Three templating approaches were simultaneously utilized in achieving this; namely, soft-templating by template-free self-assembly of an aligned macroporous structure, freeze-casting for the preservation of particle dispersion found in suspension, and …
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"Reactive hard templating" : from carbon nitrides to metal nitrides
… applied. For sol-gel processes, usually “soft” templating techniques are employed, while “hard” templates are used for high temperature synthesis pathways. In classical templating approaches, the template has the unique role of structure directing agent, in the sense that it is not participating …
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Direct Templating of Semiconductor Nanostructures With Lyotropic Liquid Crystals
… Two distinct methodologies were studied---bulk templating and thin film templating. Bulk templating yields a powder of material containing the expected nanoscale features and thin film templating, a thin film with a defined nanostructure. In both systems, the structure and symmetry of the …
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Unique templating of and applications enabled through mesoporous colloids
This work describes the templating process and applications enabled by utilizing mesoporous colloids, colloidal crystals, and films. Silica colloidal crystals, having colloids of less than 300 nm, were fabricated and used as a template for silicon deposition. Brillouin Light Scattering (BLS) …
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Templating Metal Clusters via Resorcinarene- and Cyclen- Based Ligand Platforms
… I also cover the current method of developing templating ligands to drive the synthesis of clusters and their reactivity. In Chapter 2, I discuss the synthesis of a tetraamine scaffold RL(NH2)4, where L is a rigidified resorcin[4]arene ligand and R = Methyl, Phenyl and Isobutyl groups. We found …
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Crystal-Amorphous Transformation Via Defect-Templating in Phase-Change Materials
Phase-change materials (PCM) such as GeTe and Ge-Sb-Te alloys are potential candidates for non-volatile memory applications, because they can reversibly and rapidly transform between a crystalline phase and an amorphous phase with medium-range order. Traditionally, crystal-amorphous transformation …
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Templating of Metal Oxide and Oxhydroxides Nanoparticles in Surfactant Media
… of =3.3 - 5.5 nm. The Brij 97 provided a minimum templating distance of about 1.4 nm in the hexagonal phase and 1.95 nm in the lamellar. In the Neodol (l-SE)/water surfactant system, f3- & a-FeOOH particles were characterised using FT-IR, UV-VIS, PCS, TEM and AFM techniques. The -FeOOH formed …
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Synthesis and Characterization of Functional Mesostructures Using Colloidal Crystal Templating
… were synthesized via colloidal crystal templating, and their chemical, physical, and optical properties were characterized. By forming colloidal crystals through self-organization, infiltrating the interstitial space with functional materials, and removing the templates by chemical …
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Integration of System Templating into the Rapid Ship Design Environment
… ship design toolkit. In addition, the associated templating process provides a level of automation to system design, thus providing a capability for the design and analysis of ship systems much earlier in the design process than was previously possible. Research and an experimental study were …
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Fabrication of Three-Dimensionally Ordered Nanostructured Materials Through Colloidal Crystal Templating
The void spaces in colloidal crystals (opals, three-dimensional (3D) close-packed arrays of silica nanospheres) and their replicas are used as templates in the fabrication of new nanostructured materials. 3D ordered nanomeshes and nanosphere arrays are readily obtained by chemical and/or …
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Novel carbon materials with hierarchical porosity : templating strategies and advanced characterization
… using mesophase pitch as carbon precursor, two templating strategies were developed using the nanocasting approach. The synthesized (monolithic) materials combined for the first time the advantages of a hierarchical interconnected pore system in the macro- and mesorange with the advantages of …
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Fabrication of porous metal oxides for catalytic application using templating techniques
Nanostrukturierte Materialien zeichnen sich dadurch aus, dass sie aus sehr kleinen Baueinheiten zusammengesetzt sind. Typischerweise liegt die Grössenordnung dieser Bausteine im Bereich von einigen Nanometern. Ein Nanometer entspricht 10-9 Meter. Dadurch bekommen nanostrukturierte Materialien oft …
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Development of Cartilage-Derived Matrix Scaffolds via Crosslinking, Decellularization, and Ice-Templating
… collagen crosslinking techniques as well as ice-templating in order to enhance the mechanical properties of CDM scaffolds and prevent cell-mediated contraction. Furthermore, the decellularization of CDM was investigated in order to remove possible sources of immunogenicity. This work found that …
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Films minces mésoporeux d'oxydes de métaux de transition et de lithium : Influence du cation alcalin et de l'agent structurant sur la synthèse par soft templating
… au sein des films. Deux méthodes de soft templating ont été utilisées dans cette thèse. Ces méthodes consistent à ajouter à la solution de précurseurs inorganiques un copolymère amphiphile formateur de micelles, dont l'élimination ultérieure par traitement thermique permet d'obtenir des …
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Chemical and physical methods of the templated direction of block copolymers
… the research of a combined physical and chemical templating method with two BCPs. The method was not effective in templating poly(styrene-block-methyl methacrylate) (PS-b-PMMA) BCP because of limited template wettability. The method effectively templated poly(octofluro …
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Production of nano-templated surfaces for quartz crystal microbalance
… attempted to follow the "true Liquid crystalline templating" route using high concentrations of non-ionic surfactant in the liquid crystal matrix in order to fabricate a high surface area silver electrode onto the gold electrode substrate of an Electrochemical Quartz Crystal Microbalance (EQCM). …
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