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 17 of 17 for “"colloidal self-assembly"”.
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Towards Colloidal Self-Assembly for Functional Materials
… of high value products. This thesis explores how colloidal self-assembly can be used to form macroscopic functional materials with short-range order for electronic, photonic and electrochemical applications at scale. DNA-functionalized nanoparticles are versatile models for exploring colloidal …
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Colloidal Self-Assembly: Particle Synthesis, Functionalisation and Applications
… a gelled state. This dissertation explores the self-assembly of hard and soft colloidal particles into mesoscopic structures through modification and control of their surface potentials. Due to its selective binding properties and thermal reversibility, deoxyribonucleic acid (DNA) was used to …
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Assessment of colloidal self-assembly for photonic crystal
… colloids has an interesting property of self-assembling into a three-dimensional ordered structure. This crystalline material has attracted significant interest on the implementation of photonic crystals, which have practical applications in reflectors, filters, resonators, and …
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Colloidal Self-Assembly of Novel Materials Displaying Structural Colour
Self-assembly of colloids is a powerful technique for the synthesis of novel materials. While top-down manufacturing methods can also produce structures patterned on the mesoscale, they are frequently limited in resolution, slow to employ or restricted to two-dimensional systems; in contrast, …
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Cucurbit[n]uril-based colloidal self-assembly in hybrid polymeric systems
… of new functional materials. In particular, colloidal assembly via supramolecular pathway has contributed to numerous innovations in material chemistry, on account of its specific, directional and dynamic non-covalent interactions. By taking advantage of the non-covalent supramolecular …
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Novel methods for fabrication of non-close-packed structures through colloidal self-assembly
Colloidal dispersions are usually stabilized by interparticle electrostatic repulsion. However, strong electrostatic potentials prevent nucleation of new structures. When the electrostatic potential is strongly attractive, particles coagulate into a disordered structure; if it is strongly …
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Evaporation-Driven Assembly as a Route to Photonic Materials
… to the art of preparing photonic crystals by colloidal self-assembly at an evaporating solvent-air interface, a promising approach for preparing thin films of photonic material over large areas at low cost, if some defects are permissible. The simplest possible example of evaporation-driven …
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Direct-write assembly of colloidal materials
Colloidal assembly, which is the spontaneous organization of nano- and micro- sized particles, is an attractive means to create materials with properties that can be engineered via hierarchy of particle composition, size, ordering, and macroscopic form. However, while there are well-established …
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Three-dimensional periodic structures for enhancing light-matter interaction and energy storage
… to fabricate 3D meso-structured materials, colloidal self-assembly and holographic lithography are particularly attractive owing to their ability to create large, uniform templates. However, these 3D structures require extrinsic functionalities (e.g. emitters, microcavities or energy …
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Organization of Paramagnetic and Nonmagnetic Colloidal Particles in Ferrofluid
… between paramagnetic and nonmagnetic colloidal particles immersed in a magnetic fluid under the influence of an external time dependent magnetic field. These interactions play an important role in colloidal self-assembly. As a result, of these interactions different forms of …
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How water meets a hydrophobic surface: reluctantly and with fluctuations
… would have implications in such diverse areas as colloidal self-assembly, and the boundary conditions of fluid flow. However, the literature still remains divided as to whether or not such a depleted region exists. To investigate the existence of this layer, we have employed three surfacesensitive …
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Co-Assembly Of Nanostructured Hybrid Materials For Energy Applications
Self-assembly is employed in nature to build multi-dimensional hierarchical materials and represents a viable synthetic approach to construct next-generation functional materials for a large number of applications. This dissertation describes the design, synthesis and characterization of …
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Molecular-thermodynamic and simulation-assisted modeling of interfacial energetics
… froth flotation. In particular, the process of colloidal self-assembly harnesses the rich tapestry of interactions that operate at several length scales, including van der Waals and electrostatic interactions, the hydrophobic effect, and entropic considerations, to drive the autonomous …
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Inverse design of self-assembling colloids via landscape engineering
… applies machine learning to the study of colloidal self-assembly to provide insights on the microscopic mechanisms driving assembly phenomena and drive towards a design framework capable of rationally manipulating the free energy landscape for self-assembly to derive building blocks that …
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Soft Self-assembly and Densest Packings in Colloidal Models
… fulfill the increasingly various needs in life. Self-assembly, categorized into the ‘bottom-up’ method, is an important approach in building man-made crystals. Elegant and useful structures have been obtain by colloidal self-assembly, including triangular, kagome and square lattices in two- …
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Chiral self-assembly of cellulose nanocrystals for photonic films
The self-assembly of nanoscale building blocks offers a scalable route to functional materials, but understanding how the properties of the large-scale structure emerge from the behaviour of individual sub-units is a persistent challenge. A notable example is the self-assembly of cellulose …
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Cellulose photonics: designing functionality and optical appearance of natural materials
… isolated from natural fibres, can spontaneously self-assemble into architectures that resemble the one producing colouration in plants. Therefore, CNCs are an ideal candidate for the development of new photonic materials that can find use to substitute conventional pigments, which are often …