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Showing 1 to 15 of 15 for “"colloidal assembly"”.
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Click chemistry for colloidal assembly
… (CuAAC) to develop an approach for directed colloidal assembly. Colloidal crystals are used here as an ideal model system for studying directed self assembly. This study develops a modular approach towards colloidal assembly in which click chemistry is employed as an assisting agent via a …
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Precision pipetting and crack-free colloidal assembly
… a direct-write method to build freestanding colloidal structures via capillary-driven self-assembly from a needle is reported. A scaling law is derived that governs the rate of assembly, as well as a criterion for the initiation of cracks, thereby explaining how to build crack-free structures …
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DNA Hybridization and Ligation for Directed Colloidal Assembly
Another conventional method of colloidal assembly we pursued was sedimentation via slow centrifugation. The salt requirement for DNA hybridization and ligation made it necessary to use slow salt addition through a dialysis membrane to achieve well-ordered colloidal crystals. Well-ordered …
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Directed Colloidal Assembly and Characterization of PZT -Polymer Composites
Concentrated (&phis;PZT = 0.47) PZT-5H gels were developed as inks for the robotic deposition of 3-D, mesoscale periodic structures with self-supporting features such as lattices of rod-like elements and v-shaped test structures. The gels exhibited pH dependent viscoelastic properties and …
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Colloidal metal-organic frameworks: synthesis and assembly
… as building blocks for developing anisotropic colloidal assembly system using morphology variation in general and distinct facet in particular. Our attempt to enrich the field is from two directions: synthetic development of MOF as colloidal-sized particles and mechanistic understanding of …
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Systems Materials Design of Ordered Nanocomposite Assemblies
… molecular recognition, supramolecular chemistry, colloidal assembly, and bulk processing into unified material platforms. At the molecular and nanoscale, I investigate how multivalent supramolecular interactions can be rationally programmed by controlling the architecture of polymer binders …
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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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Thermal, electrical and mechanical properties of three-dimensional functional materials
Colloidal assembly is a dynamic phenomenon where the particulates dispersed in fluids, with the size over tens of nms to several μms, form into specific spatial organization resulting from the variations in the surroundings. The general hard sphere colloids with charged surfaces can be …
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Biotemplated resin and carbon nanomaterials for energy and environmental applications
… extensively studied, with a particular focus on colloidal assembly and materials chemistry. Genetically engineered M13 bacteriophage was shown to be particularly apt at controlling the morphology and selfassembly of phenolic resin nanofibers. The properties of these nanomaterials could be …
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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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Seeing the unseen dynamics in soft matter
… of vesicle membranes, interfacial polymers, colloidal particles. Optical imaging was applied three distinct systems to reveal the underlying physical processes that were hindered by other prior indirect measurements. First, mechanical responses of both polymer and lipid vesicles were …
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Use of Spatially Non-Uniform Electric Fields for Contact-Free Assembly of Three-Dimensional Structures from Colloidal Particles
… to the use of non-uniform electric field driven colloidal assembly are described. The first relates to experimental work using dielectrophoretic and electrohydrodynamic forces (electroosmosis) to shape three-dimensional colloidal structures. Formation and stabilization of close-packed …
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Size-binary Zincblende: A Colloidal Approach to Omnidirectional Photonic Bandgaps
Binary colloidal mixtures have the potential to greatly expand the range of mesoscale structures fabricated by self-assembly, putting them at the frontier of the realization of novel photonic crystals. Currently, it is not understood how the multicomponent basis and particle size ratio of binary …
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Colloidal Self-Assembly: Particle Synthesis, Functionalisation and Applications
… 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 coat …
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Engineering layer-by-layer nanoparticles for the targeted delivery of therapeutics to ovarian cancer
… improves throughput and scalability in colloidal LbL assembly. Chapter 3 implements this improved synthetic approach to generate a small library of LbL NPs that screen for tumor-targeting properties on ovarian cancer cells, both in vitro and in vivo. Our results demonstrate that ovarian …